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blue · cool

#accef0

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

Token name suggestion: Morning Denim

RGB
172, 206, 240
HSL
210°, 69%, 81%
CMYK
28, 14, 0, 6
Luminance
0.5920

#accef0 is a light vivid blue, 210° on the wheel and 100/100 on the cool side. Put black text on it (12.84:1). As text it scores 1.64:1 on white — use #2577CA instead. Nearest name is Light Steel Blue, nearest Tailwind family is sky.

hsl(210 69% 81%)rgb(172 206 240)Base step 300AAA inkCool

At a glance

Every number on this page in one read: what #accef0 is made of, how bright it looks, and which way it leans.

Hex
#accef0
Hue
210°
blue
Saturation
69%
vivid
Lightness
81%
light
Brightness
94%
HSV value
Perceived
79%
weighted brightness
Luminance
0.5920
WCAG relative
Temperature
Cool
100/100 cool
Color family
Blue
Tone
Vivid
Best ink
Black
12.84:1
Closest name
Light Steel Blue
ΔE2000 4.4
Chroma
20.8
LCH, 0–130ish
OKLCH L
0.838
perceptual lightness
Tailwind
sky
500 · ΔE 16.8
Web-safe
#99CCFF
nearest of 216
Where it sits
Hue210° of 360°
Saturation69%
Lightness81%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #accef0.

Temperature
Warm ← → Cool100% 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
Red15%
Green75%
Blue11%

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

Every format

HEX#accef0
HEX (8-digit)#accef0ff
RGBrgb(172, 206, 240)
RGBArgba(172, 206, 240, 1)
HSLhsl(210, 69%, 81%)
HSV / HSBhsv(210, 28%, 94%)
HWBhwb(210 67% 6%)
CMYKcmyk(28%, 14%, 0%, 6%)
LABlab(81.4 -3.7 -20.4)
LCHlch(81.4 20.8 259.8)
OKLCHoklch(0.838 0.060 248.5)
XYZ (D65)xyz(54.81, 59.20, 90.96)
Decimal11325168
Display P3color(display-p3 0.675 0.808 0.941)
Web-safe#99CCFF

Copy-ready code

every platformclick to select
/* CSS */
color: #accef0;
background-color: #accef0;
/* CSS custom property */
--brand: #accef0;
/* Tailwind (arbitrary) */
class="text-[#accef0] bg-[#accef0]"
/* SCSS */
$brand: #accef0;
/* SwiftUI */
Color(red: 0.675, green: 0.808, blue: 0.941)
/* UIKit */
UIColor(red: 0.675, green: 0.808, blue: 0.941, alpha: 1)
/* Android XML */
<color name="brand">#ACCEF0</color>
/* Android Compose */
Color(0xFFACCEF0)
/* Flutter */
Color(0xFFACCEF0)
/* Python / OpenCV (BGR) */
(240, 206, 172)
/* Python / PIL (RGB) */
(172, 206, 240)
/* Java AWT */
new Color(172, 206, 240)
/* .NET */
Color.FromArgb(255, 172, 206, 240)
/* OpenGL / Unity (0–1) */
(0.6745f, 0.8078f, 0.9412f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{172,206,240}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #accef0 85%, white);
border-color: color-mix(in oklab, #accef0 40%, transparent);
/* theme-aware in one line */
color: light-dark(#14406C, #D3E0EE);
/* relative colour syntax */
--hover: hsl(from #accef0 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: #F3F7FB;
  --brand-100: #E7F0F8;
  --brand-200: #CADEF2;
  --brand-300: #accef0;
  --brand-400: #70ABE5;
  --brand-500: #418FDD;
  --brand-600: #257ACF;
  --brand-700: #1F66AD;
  --brand-800: #19528A;
  --brand-900: #163D64;
  --brand-950: #0E263F;
  --brand: #accef0;
  --brand-ink: #000000;
  --brand-surface: #F4F7FA;
  --brand-border: #C0D6ED;
  --brand-hover: #8EBCEB;
  --brand-pressed: #70AAE5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141C24;
    --brand-ink: #D3E0EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F3F7FB',
        100: '#E7F0F8',
        200: '#CADEF2',
        300: '#accef0',
        400: '#70ABE5',
        500: '#418FDD',
        600: '#257ACF',
        700: '#1F66AD',
        800: '#19528A',
        900: '#163D64',
        950: '#0E263F',
        DEFAULT: '#accef0',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F3F7FB,
  '100': #E7F0F8,
  '200': #CADEF2,
  '300': #accef0,
  '400': #70ABE5,
  '500': #418FDD,
  '600': #257ACF,
  '700': #1F66AD,
  '800': #19528A,
  '900': #163D64,
  '950': #0E263F,
);
$brand-base: #accef0;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F3F7FB", "$type": "color" },
      "100": { "$value": "#E7F0F8", "$type": "color" },
      "200": { "$value": "#CADEF2", "$type": "color" },
      "300": { "$value": "#accef0", "$type": "color" },
      "400": { "$value": "#70ABE5", "$type": "color" },
      "500": { "$value": "#418FDD", "$type": "color" },
      "600": { "$value": "#257ACF", "$type": "color" },
      "700": { "$value": "#1F66AD", "$type": "color" },
      "800": { "$value": "#19528A", "$type": "color" },
      "900": { "$value": "#163D64", "$type": "color" },
      "950": { "$value": "#0E263F", "$type": "color" }
    },
    "brandInk": { "$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 #accef0 · 12.84:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 1.64:1
AA fail · AA large fail · AAA fail
Aa
Black text · 12.84:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #accef0 as text scores 1.64:1 on white and 12.84:1 on black.
Best tinted ink on it, if plain black or white feels flat: #14406C at 6.49:1.

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
#2577CA · 4.59:1
AA on white−34% L
#2577CA
The quick fox
#1B5996 · 7.20:1
AAA on white−46% L
#1B5996
The quick fox
#accef0 · 12.84:1
AA on blackalready passes
#accef0
The quick fox
#accef0 · 12.84:1
AAA on blackalready passes
#accef0

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #5198E0 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
#accef0 on white: 1.64:1
AA ✗ fail · AA-large · AAA
Aa
#accef0 on black: 12.84:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #accef0 as text on that neutral, and that neutral as text on #accef0.

NeutralRatioBoth directions
White1.64:1AaAa
Slate 501.56:1AaAa
Slate 1001.49:1AaAa
Slate 2001.33:1AaAa
Slate 3001.10:1AaAa
Slate 4001.57:1AaAa
Slate 5002.91:1AaAa
Slate 6004.63:1AaAa
Slate 7006.33:1AaAa
Slate 8008.95:1AaAa
Slate 90010.92:1AaAa
Black12.84:1AaAa
Colour vision deficiency
true color
protanopia · #C1CEF2
deuteranopia · #B9C7EF
tritanopia · #98D6D9

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. #accef0 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.

#F3F7FB
#E7F0F8
#CADEF2
#accef0
#70ABE5
#418FDD
#257ACF
#1F66AD
#19528A
#163D64
#0E263F
Base = 300Lightest = 50 · #F3F7FBDarkest = 950 · #0E263FText 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 0.015 248.5);
  --brand-100: oklch(0.94 0.024 248.5);
  --brand-200: oklch(0.88 0.036 248.5);
  --brand-300: oklch(0.80 0.047 248.5);
  --brand-400: oklch(0.72 0.055 248.5);
  --brand-500: oklch(0.64 0.060 248.5);
  --brand-600: oklch(0.56 0.060 248.5);
  --brand-700: oklch(0.48 0.056 248.5);
  --brand-800: oklch(0.40 0.050 248.5);
  --brand-900: oklch(0.32 0.042 248.5);
  --brand-950: oklch(0.24 0.033 248.5);
}

Colors that work with #accef0

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#F4F7FA
Tinted page background
Border#C0D6ED
Hairlines and dividers
Muted text#4B739B
Captions on the surface
Accent#B1411B
Second voice, not a rival
Dark variant#14406C
Hover, pressed, headers
Light variant#E9F2FB
Selected rows, tints
Dark surface#141C24
Dark-mode background
Hover#8EBCEB
One step down in lightness
Pressed#70AAE5
Two steps down
Disabled#F3F5F7
Chroma pulled out
Focus ring#B9D8F7
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 #accef0

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 #14406C
Safe as a 1px border on white
No — use #5198E0

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
  • Weight19/100
  • 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#F0CEAC
Analogous left#ACF0F0
Analogous right#ACACF0
Split-complement 1#F0ACAC
Split-complement 2#F0F0AC
Triadic 1#F0ACCE
Triadic 2#CEF0AC
Tetradic#F0ACF0
On the wheel
Base+30°−30°+120°+240°+180°210°

#accef0 sits at 210°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red67.5%
Green80.8%
Blue94.1%
R · 0–255
172
0xac
G · 0–255
206
0xce
B · 0–255
240
0xf0

CMYK percentages

Cyan28.3%
Magenta14.2%
Yellow0.0%
Key (black)5.9%

Total ink coverage is 48%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#accef0 text on a black background

contrast 12.84:1

Card sample

#accef0 text on a white background

contrast 1.64:1

Card sample

#accef0 on grey

1.49:1

#accef0 on its own surface

1.52:1

#accef0 on its dark surface

10.51:1

CSS3 live lab

Text font color

The quick brown fox

color: #accef0;
Background color
Panel with #accef0 background
background-color: #accef0;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #accef0;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(172, 206, 240, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(172, 206, 240, 0.45);
Border & gradient
Gradient panel
border: 3px solid #accef0;
background: linear-gradient(135deg, #accef0, #B7ACF0);
Gradient text

Gradient headline

background: linear-gradient(90deg, #accef0, #C8ACF0);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #accef0;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #accef0;
caret-color: #accef0;
Left rule
Pull quote or callout
border-left: 4px solid #accef0;
Ring + tint
Selected chip
background: #E9F2FB;
box-shadow: inset 0 0 0 2px #accef0;
Conic badge
68%
background: conic-gradient(#accef0 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #accef0 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, 206, 240, 0.5)
rgb(172 206 240 / 50%)
#accef080
hsl(210 69% 81% / 50%)
color-mix(in srgb, #accef0 50%, transparent)
Alpha8-digit hexFlat on white
10%#accef01a#F7FAFE
20%#accef033#EEF5FC
40%#accef066#DEEBF9
60%#accef099#CDE2F6
80%#accef0cc#BDD8F3

Gradients from #accef0

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, #E0EDF9, #accef0 45%, #14406C);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #accef0, #A892EB);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #accef0, #F0CEAC);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F2F7FD 0%, #accef0 45%, #14406C 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F7FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #D7F8F5 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #CAC6F5 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #14406C 0%, transparent 65%), #accef0;

Monochromatic scale

Palettes built from #accef0

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.

#accef0 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 12.84:1.

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.

#accef0, answered

What color is #accef0?

#accef0 is a light vivid blue, closest to Light Steel Blue (ΔE2000 4.4). It sits at 210° on the hue wheel with 69% saturation and 81% lightness, which reads as cool.

What is the RGB value of #accef0?

rgb(172, 206, 240) — 172 red, 206 green and 240 blue out of 255, or 67.5% / 80.8% / 94.1% by channel.

What is #accef0 in HSL and HSV?

hsl(210, 69%, 81%) and hsv(210, 28%, 94%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #accef0 a light or a dark color?

It is a light color. Relative luminance is 0.5920 and perceived brightness is 79%, so black text on it reaches 12.84:1.

Should I use black or white text on #accef0?

Black. It scores 12.84:1 against #accef0, versus 1.64:1 for white — AAA at any size.

Is #accef0 accessible on a white background?

#accef0 on white scores 1.64:1, which fails WCAG AA at every size. Darken it to #2577CA to reach 4.5:1, or #1B5996 for 7:1.

What is the complementary color of #accef0?

#F0CEAC sits directly opposite on the wheel. Softer options are the split-complements #F0ACAC and #F0F0AC, which give the same contrast with far less vibration.

What colors go well with #accef0?

For interface work: #F4F7FA as the surface, #C0D6ED for borders, #4B739B for secondary text, #B1411B as an accent and #14406C for hover and pressed states. For a palette, the analogous pair #ACF0F0 and #ACACF0 stays calm, while #F0CEAC is the loudest partner.

What is #accef0 in CMYK for printing?

cmyk(28%, 14%, 0%, 6%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #accef0 warm or cool?

Cool — it scores 100 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #ACB5F0; nudged cooler, #95BFED.

Which Tailwind color is closest to #accef0?

The sky family — its 500 step is #0ea5e9, ΔE2000 16.8 away. That is a visible difference, so define #accef0 as a custom token rather than reaching for the built-in.

How do I use #accef0 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#accef0] or text-[#accef0], 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 #accef0 with 50% opacity?

rgba(172, 206, 240, 0.5), or #accef080 in eight-digit hex. Over white that composites to #D6E7F8; over black, #566778.

Is #accef0 a web-safe color?

No. The nearest web-safe colour is #99CCFF, ΔE2000 4.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #accef0 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 #accef0?

The safest is same-hue elevation: linear-gradient(135deg, #E0EDF9, #accef0 45%, #14406C). For more colour, a short hue run to #A892EB keeps it rich without turning muddy.

Work with #accef0 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #accef0 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.