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blue · cool

#acb4da

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

Token name suggestion: Drift Harbour

RGB
172, 180, 218
HSL
230°, 38%, 77%
CMYK
21, 17, 0, 15
Luminance
0.4648

#acb4da is a light soft blue, 230° on the wheel and 89/100 on the cool side. Put black text on it (10.30:1). As text it scores 2.04:1 on white — use #6271B9 instead. Nearest name is Light Steel Blue, nearest Tailwind family is blue.

hsl(230 38% 77%)rgb(172 180 218)Base step 300AAA inkCool

At a glance

Every number on this page in one read: what #acb4da is made of, how bright it looks, and which way it leans.

Hex
#acb4da
Hue
230°
blue
Saturation
38%
soft
Lightness
77%
light
Brightness
85%
HSV value
Perceived
72%
weighted brightness
Luminance
0.4648
WCAG relative
Temperature
Cool
89/100 cool
Color family
Blue
Tone
Soft
Best ink
Black
10.30:1
Closest name
Light Steel Blue
ΔE2000 7.7
Chroma
20.7
LCH, 0–130ish
OKLCH L
0.776
perceptual lightness
Tailwind
blue
500 · ΔE 21.4
Web-safe
#99CCCC
nearest of 216
Where it sits
Hue230° of 360°
Saturation38%
Lightness77%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #acb4da.

Temperature
Warm ← → Cool89% 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
Red19%
Green70%
Blue11%

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

Every format

HEX#acb4da
HEX (8-digit)#acb4daff
RGBrgb(172, 180, 218)
RGBArgba(172, 180, 218, 1)
HSLhsl(230, 38%, 77%)
HSV / HSBhsv(230, 21%, 85%)
HWBhwb(230 67% 15%)
CMYKcmyk(21%, 17%, 0%, 15%)
LABlab(73.8 5.2 -20.0)
LCHlch(73.8 20.7 284.6)
OKLCHoklch(0.776 0.055 275.7)
XYZ (D65)xyz(45.99, 46.47, 72.86)
Decimal11318490
Display P3color(display-p3 0.675 0.706 0.855)
Web-safe#99CCCC

Copy-ready code

every platformclick to select
/* CSS */
color: #acb4da;
background-color: #acb4da;
/* CSS custom property */
--brand: #acb4da;
/* Tailwind (arbitrary) */
class="text-[#acb4da] bg-[#acb4da]"
/* SCSS */
$brand: #acb4da;
/* SwiftUI */
Color(red: 0.675, green: 0.706, blue: 0.855)
/* UIKit */
UIColor(red: 0.675, green: 0.706, blue: 0.855, alpha: 1)
/* Android XML */
<color name="brand">#ACB4DA</color>
/* Android Compose */
Color(0xFFACB4DA)
/* Flutter */
Color(0xFFACB4DA)
/* Python / OpenCV (BGR) */
(218, 180, 172)
/* Python / PIL (RGB) */
(172, 180, 218)
/* Java AWT */
new Color(172, 180, 218)
/* .NET */
Color.FromArgb(255, 172, 180, 218)
/* OpenGL / Unity (0–1) */
(0.6745f, 0.7059f, 0.8549f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{172,180,218}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #acb4da 85%, white);
border-color: color-mix(in oklab, #acb4da 40%, transparent);
/* theme-aware in one line */
color: light-dark(#273058, #D5D9EC);
/* relative colour syntax */
--hover: hsl(from #acb4da 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: #F5F6FA;
  --brand-100: #EBEDF4;
  --brand-200: #D3D7E9;
  --brand-300: #acb4da;
  --brand-400: #8B96CB;
  --brand-500: #6473BA;
  --brand-600: #4C5CA9;
  --brand-700: #3F4C8D;
  --brand-800: #323D71;
  --brand-900: #282F53;
  --brand-950: #191D34;
  --brand: #acb4da;
  --brand-ink: #000000;
  --brand-surface: #F4F5FA;
  --brand-border: #C7CCE6;
  --brand-hover: #939ECF;
  --brand-pressed: #7B87C4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141724;
    --brand-ink: #D5D9EC;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F5F6FA',
        100: '#EBEDF4',
        200: '#D3D7E9',
        300: '#acb4da',
        400: '#8B96CB',
        500: '#6473BA',
        600: '#4C5CA9',
        700: '#3F4C8D',
        800: '#323D71',
        900: '#282F53',
        950: '#191D34',
        DEFAULT: '#acb4da',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F5F6FA,
  '100': #EBEDF4,
  '200': #D3D7E9,
  '300': #acb4da,
  '400': #8B96CB,
  '500': #6473BA,
  '600': #4C5CA9,
  '700': #3F4C8D,
  '800': #323D71,
  '900': #282F53,
  '950': #191D34,
);
$brand-base: #acb4da;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F5F6FA", "$type": "color" },
      "100": { "$value": "#EBEDF4", "$type": "color" },
      "200": { "$value": "#D3D7E9", "$type": "color" },
      "300": { "$value": "#acb4da", "$type": "color" },
      "400": { "$value": "#8B96CB", "$type": "color" },
      "500": { "$value": "#6473BA", "$type": "color" },
      "600": { "$value": "#4C5CA9", "$type": "color" },
      "700": { "$value": "#3F4C8D", "$type": "color" },
      "800": { "$value": "#323D71", "$type": "color" },
      "900": { "$value": "#282F53", "$type": "color" },
      "950": { "$value": "#191D34", "$type": "color" }
    },
    "brandInk": { "$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 #acb4da · 10.30:1
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 · 10.30:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #acb4da as text scores 2.04:1 on white and 10.30:1 on black.
Best tinted ink on it, if plain black or white feels flat: #273058 at 6.24:1.

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
#6271B9 · 4.58:1
AA on white−21% L
#6271B9
The quick fox
#445399 · 7.14:1
AAA on white−33% L
#445399
The quick fox
#acb4da · 10.30:1
AA on blackalready passes
#acb4da
The quick fox
#acb4da · 10.30:1
AAA on blackalready passes
#acb4da

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #8591C9 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
#acb4da on white: 2.04:1
AA ✗ fail · AA-large · AAA
Aa
#acb4da on black: 10.30:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #acb4da as text on that neutral, and that neutral as text on #acb4da.

NeutralRatioBoth directions
White2.04:1AaAa
Slate 501.95:1AaAa
Slate 1001.86:1AaAa
Slate 2001.65:1AaAa
Slate 3001.37:1AaAa
Slate 4001.26:1AaAa
Slate 5002.33:1AaAa
Slate 6003.71:1AaAa
Slate 7005.08:1AaAa
Slate 8007.17:1AaAa
Slate 9008.75:1AaAa
Black10.30:1AaAa
Colour vision deficiency
true color
protanopia · #AAB7DC
deuteranopia · #A7B4D9
tritanopia · #A1BBC1

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. #acb4da is pinned to step 300; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F5F6FA
#EBEDF4
#D3D7E9
#acb4da
#8B96CB
#6473BA
#4C5CA9
#3F4C8D
#323D71
#282F53
#191D34
Base = 300Lightest = 50 · #F5F6FADarkest = 950 · #191D34Text step on white = 600
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 0.014 275.7);
  --brand-100: oklch(0.94 0.022 275.7);
  --brand-200: oklch(0.88 0.033 275.7);
  --brand-300: oklch(0.80 0.043 275.7);
  --brand-400: oklch(0.72 0.051 275.7);
  --brand-500: oklch(0.64 0.055 275.7);
  --brand-600: oklch(0.56 0.055 275.7);
  --brand-700: oklch(0.48 0.052 275.7);
  --brand-800: oklch(0.40 0.046 275.7);
  --brand-900: oklch(0.32 0.038 275.7);
  --brand-950: oklch(0.24 0.030 275.7);
}

Colors that work with #acb4da

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#F4F5FA
Tinted page background
Border#C7CCE6
Hairlines and dividers
Muted text#4B599B
Captions on the surface
Accent#916D3B
Second voice, not a rival
Dark variant#273058
Hover, pressed, headers
Light variant#EDEFF7
Selected rows, tints
Dark surface#141724
Dark-mode background
Hover#939ECF
One step down in lightness
Pressed#7B87C4
Two steps down
Disabled#F3F3F7
Chroma pulled out
Focus ring#B5BEE5
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 #acb4da

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

Works well for
  • Text and icons on dark surfaces
  • Charts, tags and secondary surfaces
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • 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 #273058
Safe as a 1px border on white
No — use #8591C9

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.

The muted chroma softens the association — it reads considered rather than loud, which suits long-form and data-heavy screens. 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
  • FormalityMedium
  • EnergyMedium
  • Weight24/100
  • 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#DAD2AC
Analogous left#ACCBDA
Analogous right#BBACDA
Split-complement 1#DABBAC
Split-complement 2#CBDAAC
Triadic 1#DAACB4
Triadic 2#B4DAAC
Tetradic#DAACCB
On the wheel
Base+30°−30°+120°+240°+180°230°

#acb4da sits at 230°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red67.5%
Green70.6%
Blue85.5%
R · 0–255
172
0xac
G · 0–255
180
0xb4
B · 0–255
218
0xda

CMYK percentages

Cyan21.1%
Magenta17.4%
Yellow0.0%
Key (black)14.5%

Total ink coverage is 53%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#acb4da text on a black background

contrast 10.30:1

Card sample

#acb4da text on a white background

contrast 2.04:1

Card sample

#acb4da on grey

1.86:1

#acb4da on its own surface

1.87:1

#acb4da on its dark surface

8.74:1

CSS3 live lab

Text font color

The quick brown fox

color: #acb4da;
Background color
Panel with #acb4da background
background-color: #acb4da;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #acb4da;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(172, 180, 218, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(172, 180, 218, 0.45);
Border & gradient
Gradient panel
border: 3px solid #acb4da;
background: linear-gradient(135deg, #acb4da, #C3ACDA);
Gradient text

Gradient headline

background: linear-gradient(90deg, #acb4da, #CEACDA);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #acb4da;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #acb4da;
caret-color: #acb4da;
Left rule
Pull quote or callout
border-left: 4px solid #acb4da;
Ring + tint
Selected chip
background: #EDEFF7;
box-shadow: inset 0 0 0 2px #acb4da;
Conic badge
68%
background: conic-gradient(#acb4da 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #acb4da 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(172, 180, 218, 0.5)
rgb(172 180 218 / 50%)
#acb4da80
hsl(230 38% 77% / 50%)
color-mix(in srgb, #acb4da 50%, transparent)
Alpha8-digit hexFlat on white
10%#acb4da1a#F7F8FB
20%#acb4da33#EEF0F8
40%#acb4da66#DEE1F0
60%#acb4da99#CDD2E9
80%#acb4dacc#BDC3E1

Gradients from #acb4da

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, #D6DAED, #acb4da 45%, #273058);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #acb4da, #B897D1);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #acb4da, #DAD2AC);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #ECEDF6 0%, #acb4da 45%, #273058 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F5FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #CFE3EA 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #CFC1E3 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #273058 0%, transparent 65%), #acb4da;

Monochromatic scale

Palettes built from #acb4da

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.

#acb4da 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

Converts to four-color process without much drama. Proof it anyway.

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 10.30:1.

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.

#acb4da, answered

What color is #acb4da?

#acb4da is a light soft blue, closest to Light Steel Blue (ΔE2000 7.7). It sits at 230° on the hue wheel with 38% saturation and 77% lightness, which reads as cool.

What is the RGB value of #acb4da?

rgb(172, 180, 218) — 172 red, 180 green and 218 blue out of 255, or 67.5% / 70.6% / 85.5% by channel.

What is #acb4da in HSL and HSV?

hsl(230, 38%, 77%) and hsv(230, 21%, 85%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #acb4da a light or a dark color?

It is a mid-tone. Relative luminance is 0.4648 and perceived brightness is 72%, so black text on it reaches 10.30:1.

Should I use black or white text on #acb4da?

Black. It scores 10.30:1 against #acb4da, versus 2.04:1 for white — AAA at any size.

Is #acb4da accessible on a white background?

#acb4da on white scores 2.04:1, which fails WCAG AA at every size. Darken it to #6271B9 to reach 4.5:1, or #445399 for 7:1.

What is the complementary color of #acb4da?

#DAD2AC sits directly opposite on the wheel. Softer options are the split-complements #DABBAC and #CBDAAC, which give the same contrast with far less vibration.

What colors go well with #acb4da?

For interface work: #F4F5FA as the surface, #C7CCE6 for borders, #4B599B for secondary text, #916D3B as an accent and #273058 for hover and pressed states. For a palette, the analogous pair #ACCBDA and #BBACDA stays calm, while #DAD2AC is the loudest partner.

What is #acb4da in CMYK for printing?

cmyk(21%, 17%, 0%, 15%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #acb4da warm or cool?

Cool — it scores 89 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #B5ACDA; nudged cooler, #ABBFDB.

Which Tailwind color is closest to #acb4da?

The blue family — its 500 step is #3b82f6, ΔE2000 21.4 away. That is a visible difference, so define #acb4da as a custom token rather than reaching for the built-in.

How do I use #acb4da in Tailwind CSS?

Inline it as an arbitrary value with bg-[#acb4da] or text-[#acb4da], 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 #acb4da with 50% opacity?

rgba(172, 180, 218, 0.5), or #acb4da80 in eight-digit hex. Over white that composites to #D6DAED; over black, #565A6D.

Is #acb4da a web-safe color?

No. The nearest web-safe colour is #99CCCC, ΔE2000 21.8 away. The palette only matters for legacy displays and some email clients now.

What does the color #acb4da 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 moderate chroma the association is present but not shouted.

What gradient works with #acb4da?

The safest is same-hue elevation: linear-gradient(135deg, #D6DAED, #acb4da 45%, #273058). For more colour, a short hue run to #B897D1 keeps it rich without turning muddy.

Work with #acb4da in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #acb4da at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.