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blue · cool

#a3abcf

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

Token name suggestion: Meadow Sapphire

RGB
163, 171, 207
HSL
229°, 31%, 73%
CMYK
21, 17, 0, 19
Luminance
0.4142

#a3abcf is a light soft blue, 229° on the wheel and 85/100 on the cool side. Put black text on it (9.28:1). As text it scores 2.26:1 on white — use #6371AE instead. Nearest name is Light Steel Blue, nearest Tailwind family is blue.

hsl(229 31% 73%)rgb(163 171 207)Base step 300AAA inkCool

At a glance

Every number on this page in one read: what #a3abcf is made of, how bright it looks, and which way it leans.

Hex
#a3abcf
Hue
229°
blue
Saturation
31%
soft
Lightness
73%
light
Brightness
81%
HSV value
Perceived
68%
weighted brightness
Luminance
0.4142
WCAG relative
Temperature
Cool
85/100 cool
Color family
Blue
Tone
Soft
Best ink
Black
9.28:1
Closest name
Light Steel Blue
ΔE2000 8.9
Chroma
19.8
LCH, 0–130ish
OKLCH L
0.747
perceptual lightness
Tailwind
blue
500 · ΔE 20
Web-safe
#9999CC
nearest of 216
Where it sits
Hue229° of 360°
Saturation31%
Lightness73%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #a3abcf.

Temperature
Warm ← → Cool85% 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#a3abcf
HEX (8-digit)#a3abcfff
RGBrgb(163, 171, 207)
RGBArgba(163, 171, 207, 1)
HSLhsl(229, 31%, 73%)
HSV / HSBhsv(229, 21%, 81%)
HWBhwb(229 64% 19%)
CMYKcmyk(21%, 17%, 0%, 19%)
LABlab(70.5 4.9 -19.2)
LCHlch(70.5 19.8 284.2)
OKLCHoklch(0.747 0.053 275.2)
XYZ (D65)xyz(40.93, 41.42, 64.86)
Decimal10726351
Display P3color(display-p3 0.639 0.671 0.812)
Web-safe#9999CC

Copy-ready code

every platformclick to select
/* CSS */
color: #a3abcf;
background-color: #a3abcf;
/* CSS custom property */
--brand: #a3abcf;
/* Tailwind (arbitrary) */
class="text-[#a3abcf] bg-[#a3abcf]"
/* SCSS */
$brand: #a3abcf;
/* SwiftUI */
Color(red: 0.639, green: 0.671, blue: 0.812)
/* UIKit */
UIColor(red: 0.639, green: 0.671, blue: 0.812, alpha: 1)
/* Android XML */
<color name="brand">#A3ABCF</color>
/* Android Compose */
Color(0xFFA3ABCF)
/* Flutter */
Color(0xFFA3ABCF)
/* Python / OpenCV (BGR) */
(207, 171, 163)
/* Python / PIL (RGB) */
(163, 171, 207)
/* Java AWT */
new Color(163, 171, 207)
/* .NET */
Color.FromArgb(255, 163, 171, 207)
/* OpenGL / Unity (0–1) */
(0.6392f, 0.6706f, 0.8118f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{163,171,207}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #a3abcf 85%, white);
border-color: color-mix(in oklab, #a3abcf 40%, transparent);
/* theme-aware in one line */
color: light-dark(#2C3354, #D7DAEA);
/* relative colour syntax */
--hover: hsl(from #a3abcf 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: #F5F6F9;
  --brand-100: #ECEDF3;
  --brand-200: #D5D8E7;
  --brand-300: #a3abcf;
  --brand-400: #909AC5;
  --brand-500: #6C78B2;
  --brand-600: #5462A1;
  --brand-700: #465286;
  --brand-800: #38416B;
  --brand-900: #2C324F;
  --brand-950: #1B1F31;
  --brand: #a3abcf;
  --brand-ink: #000000;
  --brand-surface: #F5F6FA;
  --brand-border: #C9CEE3;
  --brand-hover: #8B95C3;
  --brand-pressed: #7480B6;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141724;
    --brand-ink: #D7DAEA;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F5F6F9',
        100: '#ECEDF3',
        200: '#D5D8E7',
        300: '#a3abcf',
        400: '#909AC5',
        500: '#6C78B2',
        600: '#5462A1',
        700: '#465286',
        800: '#38416B',
        900: '#2C324F',
        950: '#1B1F31',
        DEFAULT: '#a3abcf',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F5F6F9,
  '100': #ECEDF3,
  '200': #D5D8E7,
  '300': #a3abcf,
  '400': #909AC5,
  '500': #6C78B2,
  '600': #5462A1,
  '700': #465286,
  '800': #38416B,
  '900': #2C324F,
  '950': #1B1F31,
);
$brand-base: #a3abcf;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F5F6F9", "$type": "color" },
      "100": { "$value": "#ECEDF3", "$type": "color" },
      "200": { "$value": "#D5D8E7", "$type": "color" },
      "300": { "$value": "#a3abcf", "$type": "color" },
      "400": { "$value": "#909AC5", "$type": "color" },
      "500": { "$value": "#6C78B2", "$type": "color" },
      "600": { "$value": "#5462A1", "$type": "color" },
      "700": { "$value": "#465286", "$type": "color" },
      "800": { "$value": "#38416B", "$type": "color" },
      "900": { "$value": "#2C324F", "$type": "color" },
      "950": { "$value": "#1B1F31", "$type": "color" }
    },
    "brandInk": { "$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 #a3abcf · 9.28:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.26:1
AA fail · AA large fail · AAA fail
Aa
Black text · 9.28:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #a3abcf as text scores 2.26:1 on white and 9.28:1 on black.
Best tinted ink on it, if plain black or white feels flat: #2C3354 at 5.43:1.

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
#6371AE · 4.66:1
AA on white−19% L
#6371AE
The quick fox
#49558B · 7.11:1
AAA on white−31% L
#49558B
The quick fox
#a3abcf · 9.28:1
AA on blackalready passes
#a3abcf
The quick fox
#a3abcf · 9.28:1
AAA on blackalready passes
#a3abcf

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #8892C1 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
#a3abcf on white: 2.26:1
AA ✗ fail · AA-large · AAA
Aa
#a3abcf on black: 9.28:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #a3abcf as text on that neutral, and that neutral as text on #a3abcf.

NeutralRatioBoth directions
White2.26:1AaAa
Slate 502.16:1AaAa
Slate 1002.06:1AaAa
Slate 2001.83:1AaAa
Slate 3001.52:1AaAa
Slate 4001.13:1AaAa
Slate 5002.10:1AaAa
Slate 6003.35:1AaAa
Slate 7004.58:1AaAa
Slate 8006.47:1AaAa
Slate 9007.89:1AaAa
Black9.28:1AaAa
Colour vision deficiency
true color
protanopia · #A1AED1
deuteranopia · #9EABCE
tritanopia · #99B2B7

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. #a3abcf 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.

#F5F6F9
#ECEDF3
#D5D8E7
#a3abcf
#909AC5
#6C78B2
#5462A1
#465286
#38416B
#2C324F
#1B1F31
Base = 300Lightest = 50 · #F5F6F9Darkest = 950 · #1B1F31Text 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 0.013 275.2);
  --brand-100: oklch(0.94 0.021 275.2);
  --brand-200: oklch(0.88 0.032 275.2);
  --brand-300: oklch(0.80 0.041 275.2);
  --brand-400: oklch(0.72 0.048 275.2);
  --brand-500: oklch(0.64 0.053 275.2);
  --brand-600: oklch(0.56 0.053 275.2);
  --brand-700: oklch(0.48 0.049 275.2);
  --brand-800: oklch(0.40 0.044 275.2);
  --brand-900: oklch(0.32 0.037 275.2);
  --brand-950: oklch(0.24 0.029 275.2);
}

Colors that work with #a3abcf

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#F5F6FA
Tinted page background
Border#C9CEE3
Hairlines and dividers
Muted text#4F5C97
Captions on the surface
Accent#8A6A42
Second voice, not a rival
Dark variant#2C3354
Hover, pressed, headers
Light variant#EEF0F6
Selected rows, tints
Dark surface#141724
Dark-mode background
Hover#8B95C3
One step down in lightness
Pressed#7480B6
Two steps down
Disabled#EEEFF4
Chroma pulled out
Focus ring#AAB3DC
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 #a3abcf

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 #2C3354
Safe as a 1px border on white
No — use #8892C1

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
  • Weight28/100
  • 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#CFC7A3
Analogous left#A3C1CF
Analogous right#B1A3CF
Split-complement 1#CFB1A3
Split-complement 2#C1CFA3
Triadic 1#CFA3AB
Triadic 2#ABCFA3
Tetradic#CFA3C1
On the wheel
Base+30°−30°+120°+240°+180°229°

#a3abcf sits at 229°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red63.9%
Green67.1%
Blue81.2%
R · 0–255
163
0xa3
G · 0–255
171
0xab
B · 0–255
207
0xcf

CMYK percentages

Cyan21.3%
Magenta17.4%
Yellow0.0%
Key (black)18.8%

Total ink coverage is 58%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#a3abcf text on a black background

contrast 9.28:1

Card sample

#a3abcf text on a white background

contrast 2.26:1

Card sample

#a3abcf on grey

2.06:1

#a3abcf on its own surface

2.09:1

#a3abcf on its dark surface

7.88:1

CSS3 live lab

Text font color

The quick brown fox

color: #a3abcf;
Background color
Panel with #a3abcf background
background-color: #a3abcf;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #a3abcf;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(163, 171, 207, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(163, 171, 207, 0.45);
Border & gradient
Gradient panel
border: 3px solid #a3abcf;
background: linear-gradient(135deg, #a3abcf, #B8A3CF);
Gradient text

Gradient headline

background: linear-gradient(90deg, #a3abcf, #C3A3CF);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #a3abcf;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #a3abcf;
caret-color: #a3abcf;
Left rule
Pull quote or callout
border-left: 4px solid #a3abcf;
Ring + tint
Selected chip
background: #EEF0F6;
box-shadow: inset 0 0 0 2px #a3abcf;
Conic badge
68%
background: conic-gradient(#a3abcf 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #a3abcf 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(163, 171, 207, 0.5)
rgb(163 171 207 / 50%)
#a3abcf80
hsl(229 31% 73% / 50%)
color-mix(in srgb, #a3abcf 50%, transparent)
Alpha8-digit hexFlat on white
10%#a3abcf1a#F6F7FA
20%#a3abcf33#EDEEF5
40%#a3abcf66#DADDEC
60%#a3abcf99#C8CDE2
80%#a3abcfcc#B5BCD9

Gradients from #a3abcf

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, #CBD0E4, #a3abcf 45%, #2C3354);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #a3abcf, #AD8FC4);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #a3abcf, #CFC7A3);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #DFE2EE 0%, #a3abcf 45%, #2C3354 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F5F6FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #C4DAE0 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #C5B7D9 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #2C3354 0%, transparent 65%), #a3abcf;

Monochromatic scale

Palettes built from #a3abcf

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.

#a3abcf 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 9.28:1.

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.

#a3abcf, answered

What color is #a3abcf?

#a3abcf is a light soft blue, closest to Light Steel Blue (ΔE2000 8.9). It sits at 229° on the hue wheel with 31% saturation and 73% lightness, which reads as cool.

What is the RGB value of #a3abcf?

rgb(163, 171, 207) — 163 red, 171 green and 207 blue out of 255, or 63.9% / 67.1% / 81.2% by channel.

What is #a3abcf in HSL and HSV?

hsl(229, 31%, 73%) and hsv(229, 21%, 81%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #a3abcf a light or a dark color?

It is a mid-tone. Relative luminance is 0.4142 and perceived brightness is 68%, so black text on it reaches 9.28:1.

Should I use black or white text on #a3abcf?

Black. It scores 9.28:1 against #a3abcf, versus 2.26:1 for white — AAA at any size.

Is #a3abcf accessible on a white background?

#a3abcf on white scores 2.26:1, which fails WCAG AA at every size. Darken it to #6371AE to reach 4.5:1, or #49558B for 7:1.

What is the complementary color of #a3abcf?

#CFC7A3 sits directly opposite on the wheel. Softer options are the split-complements #CFB1A3 and #C1CFA3, which give the same contrast with far less vibration.

What colors go well with #a3abcf?

For interface work: #F5F6FA as the surface, #C9CEE3 for borders, #4F5C97 for secondary text, #8A6A42 as an accent and #2C3354 for hover and pressed states. For a palette, the analogous pair #A3C1CF and #B1A3CF stays calm, while #CFC7A3 is the loudest partner.

What is #a3abcf in CMYK for printing?

cmyk(21%, 17%, 0%, 19%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #a3abcf warm or cool?

Cool — it scores 85 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #ABA3CF; nudged cooler, #A1B5D0.

Which Tailwind color is closest to #a3abcf?

The blue family — its 500 step is #3b82f6, ΔE2000 20 away. That is a visible difference, so define #a3abcf as a custom token rather than reaching for the built-in.

How do I use #a3abcf in Tailwind CSS?

Inline it as an arbitrary value with bg-[#a3abcf] or text-[#a3abcf], 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 #a3abcf with 50% opacity?

rgba(163, 171, 207, 0.5), or #a3abcf80 in eight-digit hex. Over white that composites to #D1D5E7; over black, #525668.

Is #a3abcf a web-safe color?

No. The nearest web-safe colour is #9999CC, ΔE2000 6.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #a3abcf 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 #a3abcf?

The safest is same-hue elevation: linear-gradient(135deg, #CBD0E4, #a3abcf 45%, #2C3354). For more colour, a short hue run to #AD8FC4 keeps it rich without turning muddy.

Work with #a3abcf in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #a3abcf at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.