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blue · cool

#a2c9df

a light, vivid blue · cool · closest name: Light Blue

Token name suggestion: Meadow Cobalt

RGB
162, 201, 223
HSL
202°, 49%, 76%
CMYK
27, 10, 0, 13
Luminance
0.5478

#a2c9df is a light vivid blue, 202° on the wheel and 97/100 on the cool side. Put black text on it (11.96:1). As text it scores 1.76:1 on white — use #377BA1 instead. Nearest name is Light Blue, nearest Tailwind family is cyan.

hsl(202 49% 76%)rgb(162 201 223)Base step 300AAA inkCool

At a glance

Every number on this page in one read: what #a2c9df is made of, how bright it looks, and which way it leans.

Hex
#a2c9df
Hue
202°
blue
Saturation
49%
vivid
Lightness
76%
light
Brightness
87%
HSV value
Perceived
76%
weighted brightness
Luminance
0.5478
WCAG relative
Temperature
Cool
97/100 cool
Color family
Blue
Tone
Vivid
Best ink
Black
11.96:1
Closest name
Light Blue
ΔE2000 5.1
Chroma
17.1
LCH, 0–130ish
OKLCH L
0.815
perceptual lightness
Tailwind
cyan
500 · ΔE 13.8
Web-safe
#99CCCC
nearest of 216
Where it sits
Hue202° of 360°
Saturation49%
Lightness76%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #a2c9df.

Temperature
Warm ← → Cool97% 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
Red14%
Green76%
Blue10%

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

Every format

HEX#a2c9df
HEX (8-digit)#a2c9dfff
RGBrgb(162, 201, 223)
RGBArgba(162, 201, 223, 1)
HSLhsl(202, 49%, 76%)
HSV / HSBhsv(202, 27%, 87%)
HWBhwb(202 64% 13%)
CMYKcmyk(27%, 10%, 0%, 13%)
LABlab(78.9 -7.9 -15.1)
LCHlch(78.9 17.1 242.4)
OKLCHoklch(0.815 0.052 233.0)
XYZ (D65)xyz(49.10, 54.78, 77.78)
Decimal10668511
Display P3color(display-p3 0.635 0.788 0.875)
Web-safe#99CCCC

Copy-ready code

every platformclick to select
/* CSS */
color: #a2c9df;
background-color: #a2c9df;
/* CSS custom property */
--brand: #a2c9df;
/* Tailwind (arbitrary) */
class="text-[#a2c9df] bg-[#a2c9df]"
/* SCSS */
$brand: #a2c9df;
/* SwiftUI */
Color(red: 0.635, green: 0.788, blue: 0.875)
/* UIKit */
UIColor(red: 0.635, green: 0.788, blue: 0.875, alpha: 1)
/* Android XML */
<color name="brand">#A2C9DF</color>
/* Android Compose */
Color(0xFFA2C9DF)
/* Flutter */
Color(0xFFA2C9DF)
/* Python / OpenCV (BGR) */
(223, 201, 162)
/* Python / PIL (RGB) */
(162, 201, 223)
/* Java AWT */
new Color(162, 201, 223)
/* .NET */
Color.FromArgb(255, 162, 201, 223)
/* OpenGL / Unity (0–1) */
(0.6353f, 0.7882f, 0.8745f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{162,201,223}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #a2c9df 85%, white);
border-color: color-mix(in oklab, #a2c9df 40%, transparent);
/* theme-aware in one line */
color: light-dark(#21485F, #D3E4EE);
/* relative colour syntax */
--hover: hsl(from #a2c9df 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: #F4F8FA;
  --brand-100: #EAF1F6;
  --brand-200: #D0E2EC;
  --brand-300: #a2c9df;
  --brand-400: #82B6D4;
  --brand-500: #589EC6;
  --brand-600: #3F8BB6;
  --brand-700: #347498;
  --brand-800: #2A5D79;
  --brand-900: #224559;
  --brand-950: #152B37;
  --brand: #a2c9df;
  --brand-ink: #000000;
  --brand-surface: #F4F8FA;
  --brand-border: #C2DCEA;
  --brand-hover: #87BAD6;
  --brand-pressed: #6DAACD;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141E24;
    --brand-ink: #D3E4EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4F8FA',
        100: '#EAF1F6',
        200: '#D0E2EC',
        300: '#a2c9df',
        400: '#82B6D4',
        500: '#589EC6',
        600: '#3F8BB6',
        700: '#347498',
        800: '#2A5D79',
        900: '#224559',
        950: '#152B37',
        DEFAULT: '#a2c9df',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4F8FA,
  '100': #EAF1F6,
  '200': #D0E2EC,
  '300': #a2c9df,
  '400': #82B6D4,
  '500': #589EC6,
  '600': #3F8BB6,
  '700': #347498,
  '800': #2A5D79,
  '900': #224559,
  '950': #152B37,
);
$brand-base: #a2c9df;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4F8FA", "$type": "color" },
      "100": { "$value": "#EAF1F6", "$type": "color" },
      "200": { "$value": "#D0E2EC", "$type": "color" },
      "300": { "$value": "#a2c9df", "$type": "color" },
      "400": { "$value": "#82B6D4", "$type": "color" },
      "500": { "$value": "#589EC6", "$type": "color" },
      "600": { "$value": "#3F8BB6", "$type": "color" },
      "700": { "$value": "#347498", "$type": "color" },
      "800": { "$value": "#2A5D79", "$type": "color" },
      "900": { "$value": "#224559", "$type": "color" },
      "950": { "$value": "#152B37", "$type": "color" }
    },
    "brandInk": { "$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 #a2c9df · 11.96:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.76:1
AA fail · AA large fail · AAA fail
Aa
Black text · 11.96:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #a2c9df as text scores 1.76:1 on white and 11.96:1 on black.
Best tinted ink on it, if plain black or white feels flat: #21485F at 5.54:1.

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
#377BA1 · 4.66:1
AA on white−33% L
#377BA1
The quick fox
#2A5E7B · 7.03:1
AAA on white−43% L
#2A5E7B
The quick fox
#a2c9df · 11.96:1
AA on blackalready passes
#a2c9df
The quick fox
#a2c9df · 11.96:1
AAA on blackalready passes
#a2c9df

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #529BC4 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
#a2c9df on white: 1.76:1
AA ✗ fail · AA-large · AAA
Aa
#a2c9df on black: 11.96:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #a2c9df as text on that neutral, and that neutral as text on #a2c9df.

NeutralRatioBoth directions
White1.76:1AaAa
Slate 501.68:1AaAa
Slate 1001.60:1AaAa
Slate 2001.42:1AaAa
Slate 3001.18:1AaAa
Slate 4001.46:1AaAa
Slate 5002.71:1AaAa
Slate 6004.31:1AaAa
Slate 7005.90:1AaAa
Slate 8008.33:1AaAa
Slate 90010.16:1AaAa
Black11.96:1AaAa
Colour vision deficiency
true color
protanopia · #BFC7E0
deuteranopia · #B6C0DF
tritanopia · #90CFD0

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. #a2c9df 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.

#F4F8FA
#EAF1F6
#D0E2EC
#a2c9df
#82B6D4
#589EC6
#3F8BB6
#347498
#2A5D79
#224559
#152B37
Base = 300Lightest = 50 · #F4F8FADarkest = 950 · #152B37Text step on white = 700
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 0.013 233.0);
  --brand-100: oklch(0.94 0.021 233.0);
  --brand-200: oklch(0.88 0.031 233.0);
  --brand-300: oklch(0.80 0.040 233.0);
  --brand-400: oklch(0.72 0.048 233.0);
  --brand-500: oklch(0.64 0.052 233.0);
  --brand-600: oklch(0.56 0.052 233.0);
  --brand-700: oklch(0.48 0.049 233.0);
  --brand-800: oklch(0.40 0.044 233.0);
  --brand-900: oklch(0.32 0.036 233.0);
  --brand-950: oklch(0.24 0.028 233.0);
}

Colors that work with #a2c9df

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#F4F8FA
Tinted page background
Border#C2DCEA
Hairlines and dividers
Muted text#4B7E9B
Captions on the surface
Accent#9C3B30
Second voice, not a rival
Dark variant#21485F
Hover, pressed, headers
Light variant#ECF4F8
Selected rows, tints
Dark surface#141E24
Dark-mode background
Hover#87BAD6
One step down in lightness
Pressed#6DAACD
Two steps down
Disabled#F3F5F7
Chroma pulled out
Focus ring#ACD3E9
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 #a2c9df

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 #21485F
Safe as a 1px border on white
No — use #529BC4

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.

This is a confident chroma: strong enough to lead a brand, restrained enough to live in an interface all day. 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-high
  • Weight25/100
  • 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#DFB8A2
Analogous left#A2DFD6
Analogous right#A2ABDF
Split-complement 1#DFA2AB
Split-complement 2#DFD6A2
Triadic 1#DFA2C9
Triadic 2#C9DFA2
Tetradic#D6A2DF
On the wheel
Base+30°−30°+120°+240°+180°202°

#a2c9df sits at 202°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red63.5%
Green78.8%
Blue87.5%
R · 0–255
162
0xa2
G · 0–255
201
0xc9
B · 0–255
223
0xdf

CMYK percentages

Cyan27.4%
Magenta9.9%
Yellow0.0%
Key (black)12.5%

Total ink coverage is 50%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#a2c9df text on a black background

contrast 11.96:1

Card sample

#a2c9df text on a white background

contrast 1.76:1

Card sample

#a2c9df on grey

1.60:1

#a2c9df on its own surface

1.64:1

#a2c9df on its dark surface

9.64:1

CSS3 live lab

Text font color

The quick brown fox

color: #a2c9df;
Background color
Panel with #a2c9df background
background-color: #a2c9df;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #a2c9df;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(162, 201, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(162, 201, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #a2c9df;
background: linear-gradient(135deg, #a2c9df, #A4A2DF);
Gradient text

Gradient headline

background: linear-gradient(90deg, #a2c9df, #B3A2DF);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #a2c9df;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #a2c9df;
caret-color: #a2c9df;
Left rule
Pull quote or callout
border-left: 4px solid #a2c9df;
Ring + tint
Selected chip
background: #ECF4F8;
box-shadow: inset 0 0 0 2px #a2c9df;
Conic badge
68%
background: conic-gradient(#a2c9df 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #a2c9df 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(162, 201, 223, 0.5)
rgb(162 201 223 / 50%)
#a2c9df80
hsl(202 49% 76% / 50%)
color-mix(in srgb, #a2c9df 50%, transparent)
Alpha8-digit hexFlat on white
10%#a2c9df1a#F6FAFC
20%#a2c9df33#ECF4F9
40%#a2c9df66#DAE9F2
60%#a2c9df99#C7DFEC
80%#a2c9dfcc#B5D4E5

Gradients from #a2c9df

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, #D0E3EF, #a2c9df 45%, #21485F);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #a2c9df, #948BD7);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #a2c9df, #DFB8A2);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #E6F1F7 0%, #a2c9df 45%, #21485F 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F8FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #C8ECE4 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #B9BBE7 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #21485F 0%, transparent 65%), #a2c9df;

Monochromatic scale

Palettes built from #a2c9df

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.

#a2c9df 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 11.96:1.

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.

#a2c9df, answered

What color is #a2c9df?

#a2c9df is a light vivid blue, closest to Light Blue (ΔE2000 5.1). It sits at 202° on the hue wheel with 49% saturation and 76% lightness, which reads as cool.

What is the RGB value of #a2c9df?

rgb(162, 201, 223) — 162 red, 201 green and 223 blue out of 255, or 63.5% / 78.8% / 87.5% by channel.

What is #a2c9df in HSL and HSV?

hsl(202, 49%, 76%) and hsv(202, 27%, 87%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #a2c9df a light or a dark color?

It is a light color. Relative luminance is 0.5478 and perceived brightness is 76%, so black text on it reaches 11.96:1.

Should I use black or white text on #a2c9df?

Black. It scores 11.96:1 against #a2c9df, versus 1.76:1 for white — AAA at any size.

Is #a2c9df accessible on a white background?

#a2c9df on white scores 1.76:1, which fails WCAG AA at every size. Darken it to #377BA1 to reach 4.5:1, or #2A5E7B for 7:1.

What is the complementary color of #a2c9df?

#DFB8A2 sits directly opposite on the wheel. Softer options are the split-complements #DFA2AB and #DFD6A2, which give the same contrast with far less vibration.

What colors go well with #a2c9df?

For interface work: #F4F8FA as the surface, #C2DCEA for borders, #4B7E9B for secondary text, #9C3B30 as an accent and #21485F for hover and pressed states. For a palette, the analogous pair #A2DFD6 and #A2ABDF stays calm, while #DFB8A2 is the loudest partner.

What is #a2c9df in CMYK for printing?

cmyk(27%, 10%, 0%, 13%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #a2c9df warm or cool?

Cool — it scores 97 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #A2DFDF; nudged cooler, #A1C1E0.

Which Tailwind color is closest to #a2c9df?

The cyan family — its 500 step is #06b6d4, ΔE2000 13.8 away. That is a visible difference, so define #a2c9df as a custom token rather than reaching for the built-in.

How do I use #a2c9df in Tailwind CSS?

Inline it as an arbitrary value with bg-[#a2c9df] or text-[#a2c9df], 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 #a2c9df with 50% opacity?

rgba(162, 201, 223, 0.5), or #a2c9df80 in eight-digit hex. Over white that composites to #D1E4EF; over black, #516570.

Is #a2c9df a web-safe color?

No. The nearest web-safe colour is #99CCCC, ΔE2000 10.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #a2c9df 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 #a2c9df?

The safest is same-hue elevation: linear-gradient(135deg, #D0E3EF, #a2c9df 45%, #21485F). For more colour, a short hue run to #948BD7 keeps it rich without turning muddy.

Work with #a2c9df in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #a2c9df at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.