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blue · cool

#b5acfc

a light, electric blue · cool · closest name: Light Steel Blue

Token name suggestion: Morning Harbour

RGB
181, 172, 252
HSL
247°, 93%, 83%
CMYK
28, 32, 0, 1
Luminance
0.4636

#b5acfc is a light electric blue, 247° on the wheel and 80/100 on the cool side. Put black text on it (10.27:1). As text it scores 2.04:1 on white — use #6F5DF9 instead. Nearest name is Light Steel Blue, nearest Tailwind family is blue.

hsl(247 93% 83%)rgb(181 172 252)Base step 200AAA inkCool

At a glance

Every number on this page in one read: what #b5acfc is made of, how bright it looks, and which way it leans.

Hex
#b5acfc
Hue
247°
blue
Saturation
93%
electric
Lightness
83%
light
Brightness
99%
HSV value
Perceived
73%
weighted brightness
Luminance
0.4636
WCAG relative
Temperature
Cool
80/100 cool
Color family
Blue
Tone
Electric
Best ink
Black
10.27:1
Closest name
Light Steel Blue
ΔE2000 10
Chroma
43.6
LCH, 0–130ish
OKLCH L
0.782
perceptual lightness
Tailwind
blue
500 · ΔE 20.7
Web-safe
#CC99FF
nearest of 216
Where it sits
Hue247° of 360°
Saturation93%
Lightness83%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #b5acfc.

Temperature
Warm ← → Cool80% cool

Reads cool. Warm and cool siblings keep the same lightness, so you can swap one in without redoing your contrast maths.

Luminance by channel
Red21%
Green64%
Blue15%

Green carries most of what the eye calls brightness — that is why WCAG weights it 0.7152.

Every format

HEX#b5acfc
HEX (8-digit)#b5acfcff
RGBrgb(181, 172, 252)
RGBArgba(181, 172, 252, 1)
HSLhsl(247, 93%, 83%)
HSV / HSBhsv(247, 32%, 99%)
HWBhwb(247 67% 1%)
CMYKcmyk(28%, 32%, 0%, 1%)
LABlab(73.8 20.3 -38.5)
LCHlch(73.8 43.6 297.8)
OKLCHoklch(0.782 0.113 288.7)
XYZ (D65)xyz(51.37, 46.36, 98.32)
Decimal11906300
Display P3color(display-p3 0.710 0.675 0.988)
Web-safe#CC99FF

Copy-ready code

every platformclick to select
/* CSS */
color: #b5acfc;
background-color: #b5acfc;
/* CSS custom property */
--brand: #b5acfc;
/* Tailwind (arbitrary) */
class="text-[#b5acfc] bg-[#b5acfc]"
/* SCSS */
$brand: #b5acfc;
/* SwiftUI */
Color(red: 0.710, green: 0.675, blue: 0.988)
/* UIKit */
UIColor(red: 0.710, green: 0.675, blue: 0.988, alpha: 1)
/* Android XML */
<color name="brand">#B5ACFC</color>
/* Android Compose */
Color(0xFFB5ACFC)
/* Flutter */
Color(0xFFB5ACFC)
/* Python / OpenCV (BGR) */
(252, 172, 181)
/* Python / PIL (RGB) */
(181, 172, 252)
/* Java AWT */
new Color(181, 172, 252)
/* .NET */
Color.FromArgb(255, 181, 172, 252)
/* OpenGL / Unity (0–1) */
(0.7098f, 0.6745f, 0.9882f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{181,172,252}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #b5acfc 85%, white);
border-color: color-mix(in oklab, #b5acfc 40%, transparent);
/* theme-aware in one line */
color: light-dark(#12047B, #D6D3EE);
/* relative colour syntax */
--hover: hsl(from #b5acfc h s calc(l - 7));

Design tokens

The same ramp in the four formats a team actually needs. Paste one and the whole palette lands with it.

css custom propertiesclick to select
:root {
  --brand-50: #F3F2FD;
  --brand-100: #E7E4FB;
  --brand-200: #b5acfc;
  --brand-300: #9F93FB;
  --brand-400: #6E5DF9;
  --brand-500: #3E26F7;
  --brand-600: #2209EC;
  --brand-700: #1D07C5;
  --brand-800: #17069D;
  --brand-900: #150972;
  --brand-950: #0D0647;
  --brand: #b5acfc;
  --brand-ink: #000000;
  --brand-surface: #F5F4FA;
  --brand-border: #C5C0ED;
  --brand-hover: #9689FB;
  --brand-pressed: #7867F9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #161424;
    --brand-ink: #D6D3EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F3F2FD',
        100: '#E7E4FB',
        200: '#b5acfc',
        300: '#9F93FB',
        400: '#6E5DF9',
        500: '#3E26F7',
        600: '#2209EC',
        700: '#1D07C5',
        800: '#17069D',
        900: '#150972',
        950: '#0D0647',
        DEFAULT: '#b5acfc',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F3F2FD,
  '100': #E7E4FB,
  '200': #b5acfc,
  '300': #9F93FB,
  '400': #6E5DF9,
  '500': #3E26F7,
  '600': #2209EC,
  '700': #1D07C5,
  '800': #17069D,
  '900': #150972,
  '950': #0D0647,
);
$brand-base: #b5acfc;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F3F2FD", "$type": "color" },
      "100": { "$value": "#E7E4FB", "$type": "color" },
      "200": { "$value": "#b5acfc", "$type": "color" },
      "300": { "$value": "#9F93FB", "$type": "color" },
      "400": { "$value": "#6E5DF9", "$type": "color" },
      "500": { "$value": "#3E26F7", "$type": "color" },
      "600": { "$value": "#2209EC", "$type": "color" },
      "700": { "$value": "#1D07C5", "$type": "color" },
      "800": { "$value": "#17069D", "$type": "color" },
      "900": { "$value": "#150972", "$type": "color" },
      "950": { "$value": "#0D0647", "$type": "color" }
    },
    "brandInk": { "$value": "#000000", "$type": "color" }
  }
}

Best text color

Only one of black and white can be right. This is the one, with the number that proves it.

Readable at a glance#000000 on #b5acfc · 10.27:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.04:1
AA fail · AA large fail · AAA fail
Aa
Black text · 10.27:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #b5acfc as text scores 2.04:1 on white and 10.27:1 on black.
Best tinted ink on it, if plain black or white feels flat: #12047B at 7.73:1.

Make it accessible

A contrast checker tells you that you failed. This tells you what to ship instead — same hue, same saturation, lightness moved only as far as WCAG demands.

The quick fox
#6F5DF9 · 4.56:1
AA on white−16% L
#6F5DF9
The quick fox
#432CF7 · 7.14:1
AAA on white−26% L
#432CF7
The quick fox
#b5acfc · 10.27:1
AA on blackalready passes
#b5acfc
The quick fox
#b5acfc · 10.27:1
AAA on blackalready passes
#b5acfc

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #9284FB is enough for headings on white. Non-text elements such as icons, chart strokes and focus rings also sit at 3:1 under WCAG 2.2 (1.4.11).

Accessibility — WCAG contrast

Aa
#b5acfc on white: 2.04:1
AA ✗ fail · AA-large · AAA
Aa
#b5acfc on black: 10.27:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #b5acfc as text on that neutral, and that neutral as text on #b5acfc.

NeutralRatioBoth directions
White2.04:1AaAa
Slate 501.95:1AaAa
Slate 1001.87:1AaAa
Slate 2001.66:1AaAa
Slate 3001.38:1AaAa
Slate 4001.25:1AaAa
Slate 5002.33:1AaAa
Slate 6003.71:1AaAa
Slate 7005.06:1AaAa
Slate 8007.16:1AaAa
Slate 9008.73:1AaAa
Black10.27:1AaAa
Colour vision deficiency
true color
protanopia · #96B7FF
deuteranopia · #96B3FA
tritanopia · #A5BAC9

Roughly one man in twelve has some form of colour vision deficiency. If any of the three panels above is hard to tell apart from a neighbouring colour in your palette, add a shape, an icon or a label so the meaning does not rest on hue alone.

Color scale — 50 to 950

A Tailwind-shaped ramp built around this exact hex. #b5acfc is pinned to step 200; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F3F2FD
#E7E4FB
#b5acfc
#9F93FB
#6E5DF9
#3E26F7
#2209EC
#1D07C5
#17069D
#150972
#0D0647
Base = 200Lightest = 50 · #F3F2FDDarkest = 950 · #0D0647Text step on white = 400
Perceptual ramp — OKLCH

The same eleven steps expressed in OKLCH, where equal lightness numbers actually look equally spaced. HSL ramps go muddy in the yellows and washed out in the blues; this one does not. Modern browsers render it natively — the hex ramp above is the fallback.

50100200300400500600700800900950
oklch tokensclick to select
:root {
  --brand-50: oklch(0.97 0.028 288.7);
  --brand-100: oklch(0.94 0.045 288.7);
  --brand-200: oklch(0.88 0.068 288.7);
  --brand-300: oklch(0.80 0.088 288.7);
  --brand-400: oklch(0.72 0.104 288.7);
  --brand-500: oklch(0.64 0.113 288.7);
  --brand-600: oklch(0.56 0.113 288.7);
  --brand-700: oklch(0.48 0.106 288.7);
  --brand-800: oklch(0.40 0.095 288.7);
  --brand-900: oklch(0.32 0.079 288.7);
  --brand-950: oklch(0.24 0.062 288.7);
}

Colors that work with #b5acfc

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#000000
Black wins here
Surface#F5F4FA
Tinted page background
Border#C5C0ED
Hairlines and dividers
Muted text#544B9B
Captions on the surface
Accent#CAAD02
Second voice, not a rival
Dark variant#12047B
Hover, pressed, headers
Light variant#E9E6FE
Selected rows, tints
Dark surface#161424
Dark-mode background
Hover#9689FB
One step down in lightness
Pressed#7867F9
Two steps down
Disabled#F3F3F7
Chroma pulled out
Focus ring#C5BDFF
Offset from the fill so it reads
Light mode
Everything in its place

Surface, border, heading and body all derive from this one hue, so the screen stays coherent without a second palette.

Primary actionSecondaryBadge
Dark mode
Same hue, inverted

Lightness flips, hue holds. The accent stays the anchor in both themes.

Primary actionSecondaryAccent

In real components

The same eight roles, wired into the interface patterns you will actually build with them. Every state below is a computed value, not a mock-up.

Buttons and states
Save changesHoverPressedDisabled
OutlineSubtleLinkFocused
Form field
you@company.com

Focus ring uses the light variant so the field still reads as one shape.

Send me product updates
Notice
Your export is ready

The file stays available for seven days. Download it before it expires.

NewBetaDraft
Data
Storage used68%
Acme LtdActive
NorthwindTrial
GlobexActive

How to use #b5acfc

Derived from its contrast, chroma and lightness — not from taste.

Works well for
  • Text and icons on dark surfaces
  • Primary buttons and calls to action
  • Focus rings, active and selected states
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • Full-page backgrounds — tiring over long sessions
  • White text placed on it
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Not as text
Safe as a fill behind white type
No — use #12047B
Safe as a 1px border on white
No — use #9284FB

Meaning and mood

What a colour in this family tends to signal, and how this particular chroma and lightness change the reading.

trustedcalmcompetentcorporate

The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed.

At this chroma the association is amplified — it will dominate anything placed beside it, so give it space and use it sparingly. The lightness keeps it airy and approachable.

Worth knowing

It is also the most crowded hue on the web. Distinctiveness has to come from your other choices.

Reads as
  • FormalityLow
  • EnergyHigh
  • Weight17/100
  • TemperatureCool
  • ApproachabilityReserved

Colour associations are cultural and vary by market. Treat these as a starting point for a conversation with your audience, not a finding about them.

Similar colors

One move away from this hex in each direction. Every swatch is its own page.

Color relationships

The wheel positions with their names attached, so you can grab the one you actually need.

Complementary#F3FCAC
Analogous left#ACCBFC
Analogous right#DDACFC
Split-complement 1#FCDDAC
Split-complement 2#CBFCAC
Triadic 1#FCB5AC
Triadic 2#ACFCB5
Tetradic#FCACCB
On the wheel
Base+30°−30°+120°+240°+180°247°

#b5acfc sits at 247°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red71.0%
Green67.5%
Blue98.8%
R · 0–255
181
0xb5
G · 0–255
172
0xac
B · 0–255
252
0xfc

CMYK percentages

Cyan28.2%
Magenta31.7%
Yellow0.0%
Key (black)1.2%

Total ink coverage is 61%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#b5acfc text on a black background

contrast 10.27:1

Card sample

#b5acfc text on a white background

contrast 2.04:1

Card sample

#b5acfc on grey

1.87:1

#b5acfc on its own surface

1.87:1

#b5acfc on its dark surface

8.86:1

CSS3 live lab

Text font color

The quick brown fox

color: #b5acfc;
Background color
Panel with #b5acfc background
background-color: #b5acfc;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #b5acfc;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(181, 172, 252, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(181, 172, 252, 0.45);
Border & gradient
Gradient panel
border: 3px solid #b5acfc;
background: linear-gradient(135deg, #b5acfc, #EAACFC);
Gradient text

Gradient headline

background: linear-gradient(90deg, #b5acfc, #FCACFA);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #b5acfc;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #b5acfc;
caret-color: #b5acfc;
Left rule
Pull quote or callout
border-left: 4px solid #b5acfc;
Ring + tint
Selected chip
background: #E9E6FE;
box-shadow: inset 0 0 0 2px #b5acfc;
Conic badge
68%
background: conic-gradient(#b5acfc 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #b5acfc over white; the bottom row is the same alpha over a checkerboard, so you can see what survives on a photo or a video.

Bottom row of hexes is the flattened result over white — use those when a design tool refuses transparency, or when you need a solid fallback.

alpha in every syntaxclick to select
rgba(181, 172, 252, 0.5)
rgb(181 172 252 / 50%)
#b5acfc80
hsl(247 93% 83% / 50%)
color-mix(in srgb, #b5acfc 50%, transparent)
Alpha8-digit hexFlat on white
10%#b5acfc1a#F8F7FF
20%#b5acfc33#F0EEFE
40%#b5acfc66#E1DEFE
60%#b5acfc99#D3CDFD
80%#b5acfccc#C4BDFD

Gradients from #b5acfc

Six recipes, each built from this hex and shown with the exact CSS that produced it.

Elevation
Same hue, three lightnesses — safe anywhere
background: linear-gradient(135deg, #EAE7FE, #b5acfc 45%, #12047B);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #b5acfc, #EC8EFB);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #b5acfc, #F3FCAC);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F2F0FE 0%, #b5acfc 45%, #12047B 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F5F4FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #DDECFE 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #EDC9FD 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #12047B 0%, transparent 65%), #b5acfc;

Monochromatic scale

Palettes built from #b5acfc

Shades — darker

Tints — lighter

Tones — desaturated

Color harmonies

Nearest named colors

Ranked with CIEDE2000 across all 139 CSS keywords. Under ΔE 2 the eye stops telling them apart; over ΔE 10 they are plainly different colors.

#b5acfc in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyFinanceHealthcareEnterprise SaaS
Common UI roles
SurfacesBadgesHighlightsEmpty states
Print note

Sits outside most CMYK gamuts — expect a duller press result, or specify a spot ink.

On screens

Holds up across typical panel gamma. Still worth checking on an uncalibrated laptop, where mid-tones shift most.

In dark mode

Usable as-is on a dark surface at 10.27:1.

Explore nearby colors

Small, deliberate steps away from this hex — useful when you are hunting for the version of a colour that finally feels right.

#b5acfc, answered

What color is #b5acfc?

#b5acfc is a light electric blue, closest to Light Steel Blue (ΔE2000 10). It sits at 247° on the hue wheel with 93% saturation and 83% lightness, which reads as cool.

What is the RGB value of #b5acfc?

rgb(181, 172, 252) — 181 red, 172 green and 252 blue out of 255, or 71% / 67.5% / 98.8% by channel.

What is #b5acfc in HSL and HSV?

hsl(247, 93%, 83%) and hsv(247, 32%, 99%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #b5acfc a light or a dark color?

It is a mid-tone. Relative luminance is 0.4636 and perceived brightness is 73%, so black text on it reaches 10.27:1.

Should I use black or white text on #b5acfc?

Black. It scores 10.27:1 against #b5acfc, versus 2.04:1 for white — AAA at any size.

Is #b5acfc accessible on a white background?

#b5acfc on white scores 2.04:1, which fails WCAG AA at every size. Darken it to #6F5DF9 to reach 4.5:1, or #432CF7 for 7:1.

What is the complementary color of #b5acfc?

#F3FCAC sits directly opposite on the wheel. Softer options are the split-complements #FCDDAC and #CBFCAC, which give the same contrast with far less vibration.

What colors go well with #b5acfc?

For interface work: #F5F4FA as the surface, #C5C0ED for borders, #544B9B for secondary text, #CAAD02 as an accent and #12047B for hover and pressed states. For a palette, the analogous pair #ACCBFC and #DDACFC stays calm, while #F3FCAC is the loudest partner.

What is #b5acfc in CMYK for printing?

cmyk(28%, 32%, 0%, 1%). This is a screen-to-ink approximation — a color this saturated sits outside most CMYK gamuts and will print duller than it looks here.

Is #b5acfc warm or cool?

Cool — it scores 80 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #D2ACFC; nudged cooler, #ABC0FD.

Which Tailwind color is closest to #b5acfc?

The blue family — its 500 step is #3b82f6, ΔE2000 20.7 away. That is a visible difference, so define #b5acfc as a custom token rather than reaching for the built-in.

How do I use #b5acfc in Tailwind CSS?

Inline it as an arbitrary value with bg-[#b5acfc] or text-[#b5acfc], or register the whole ramp under theme.extend.colors.brand so you get bg-brand-500 and friends. The generated 50–950 scale on this page is ready to paste into your config.

What is #b5acfc with 50% opacity?

rgba(181, 172, 252, 0.5), or #b5acfc80 in eight-digit hex. Over white that composites to #DAD6FE; over black, #5B567E.

Is #b5acfc a web-safe color?

No. The nearest web-safe colour is #CC99FF, ΔE2000 8.4 away. The palette only matters for legacy displays and some email clients now.

What does the color #b5acfc mean?

As a blue, it reads trusted, calm, competent. The default of institutions for a reason: blue is read as stable and safe across nearly every culture that has been surveyed. At this chroma the effect is amplified — it will dominate whatever sits beside it.

What gradient works with #b5acfc?

The safest is same-hue elevation: linear-gradient(135deg, #EAE7FE, #b5acfc 45%, #12047B). For more colour, a short hue run to #EC8EFB keeps it rich without turning muddy.

Work with #b5acfc in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #b5acfc at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.