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blue · cool

#aeace9

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

Token name suggestion: Linen Harbour

RGB
174, 172, 233
HSL
242°, 58%, 79%
CMYK
25, 26, 0, 9
Luminance
0.4439

#aeace9 is a light vivid blue, 242° on the wheel and 82/100 on the cool side. Put black text on it (9.88:1). As text it scores 2.13:1 on white — use #6B67D7 instead. Nearest name is Light Steel Blue, nearest Tailwind family is blue.

hsl(242 58% 79%)rgb(174 172 233)Base step 300AAA inkCool

At a glance

Every number on this page in one read: what #aeace9 is made of, how bright it looks, and which way it leans.

Hex
#aeace9
Hue
242°
blue
Saturation
58%
vivid
Lightness
79%
light
Brightness
91%
HSV value
Perceived
71%
weighted brightness
Luminance
0.4439
WCAG relative
Temperature
Cool
82/100 cool
Color family
Blue
Tone
Vivid
Best ink
Black
9.88:1
Closest name
Light Steel Blue
ΔE2000 10.5
Chroma
33.2
LCH, 0–130ish
OKLCH L
0.768
perceptual lightness
Tailwind
blue
500 · ΔE 20.5
Web-safe
#9999FF
nearest of 216
Where it sits
Hue242° of 360°
Saturation58%
Lightness79%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #aeace9.

Temperature
Warm ← → Cool82% 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
Red20%
Green66%
Blue13%

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

Every format

HEX#aeace9
HEX (8-digit)#aeace9ff
RGBrgb(174, 172, 233)
RGBArgba(174, 172, 233, 1)
HSLhsl(242, 58%, 79%)
HSV / HSBhsv(242, 26%, 91%)
HWBhwb(242 67% 9%)
CMYKcmyk(25%, 26%, 0%, 9%)
LABlab(72.5 13.7 -30.3)
LCHlch(72.5 33.2 294.4)
OKLCHoklch(0.768 0.087 285.7)
XYZ (D65)xyz(46.91, 44.39, 83.17)
Decimal11447529
Display P3color(display-p3 0.682 0.675 0.914)
Web-safe#9999FF

Copy-ready code

every platformclick to select
/* CSS */
color: #aeace9;
background-color: #aeace9;
/* CSS custom property */
--brand: #aeace9;
/* Tailwind (arbitrary) */
class="text-[#aeace9] bg-[#aeace9]"
/* SCSS */
$brand: #aeace9;
/* SwiftUI */
Color(red: 0.682, green: 0.675, blue: 0.914)
/* UIKit */
UIColor(red: 0.682, green: 0.675, blue: 0.914, alpha: 1)
/* Android XML */
<color name="brand">#AEACE9</color>
/* Android Compose */
Color(0xFFAEACE9)
/* Flutter */
Color(0xFFAEACE9)
/* Python / OpenCV (BGR) */
(233, 172, 174)
/* Python / PIL (RGB) */
(174, 172, 233)
/* Java AWT */
new Color(174, 172, 233)
/* .NET */
Color.FromArgb(255, 174, 172, 233)
/* OpenGL / Unity (0–1) */
(0.6824f, 0.6745f, 0.9137f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{174,172,233}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #aeace9 85%, white);
border-color: color-mix(in oklab, #aeace9 40%, transparent);
/* theme-aware in one line */
color: light-dark(#1D1B65, #D4D3EE);
/* relative colour syntax */
--hover: hsl(from #aeace9 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: #F4F4FB;
  --brand-100: #E9E9F7;
  --brand-200: #CECDEF;
  --brand-300: #aeace9;
  --brand-400: #7D7ADC;
  --brand-500: #524ED0;
  --brand-600: #3833C2;
  --brand-700: #2F2BA1;
  --brand-800: #252281;
  --brand-900: #1F1C5E;
  --brand-950: #13123B;
  --brand: #aeace9;
  --brand-ink: #000000;
  --brand-surface: #F4F4FA;
  --brand-border: #C1C0ED;
  --brand-hover: #9290E2;
  --brand-pressed: #7774DA;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #141424;
    --brand-ink: #D4D3EE;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F4F4FB',
        100: '#E9E9F7',
        200: '#CECDEF',
        300: '#aeace9',
        400: '#7D7ADC',
        500: '#524ED0',
        600: '#3833C2',
        700: '#2F2BA1',
        800: '#252281',
        900: '#1F1C5E',
        950: '#13123B',
        DEFAULT: '#aeace9',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F4F4FB,
  '100': #E9E9F7,
  '200': #CECDEF,
  '300': #aeace9,
  '400': #7D7ADC,
  '500': #524ED0,
  '600': #3833C2,
  '700': #2F2BA1,
  '800': #252281,
  '900': #1F1C5E,
  '950': #13123B,
);
$brand-base: #aeace9;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F4F4FB", "$type": "color" },
      "100": { "$value": "#E9E9F7", "$type": "color" },
      "200": { "$value": "#CECDEF", "$type": "color" },
      "300": { "$value": "#aeace9", "$type": "color" },
      "400": { "$value": "#7D7ADC", "$type": "color" },
      "500": { "$value": "#524ED0", "$type": "color" },
      "600": { "$value": "#3833C2", "$type": "color" },
      "700": { "$value": "#2F2BA1", "$type": "color" },
      "800": { "$value": "#252281", "$type": "color" },
      "900": { "$value": "#1F1C5E", "$type": "color" },
      "950": { "$value": "#13123B", "$type": "color" }
    },
    "brandInk": { "$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 #aeace9 · 9.88:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.13:1
AA fail · AA large fail · AAA fail
Aa
Black text · 9.88:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #aeace9 as text scores 2.13:1 on white and 9.88:1 on black.
Best tinted ink on it, if plain black or white feels flat: #1D1B65 at 7.07:1.

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
#6B67D7 · 4.62:1
AA on white−17% L
#6B67D7
The quick fox
#4843CD · 7.09:1
AAA on white−26% L
#4843CD
The quick fox
#aeace9 · 9.88:1
AA on blackalready passes
#aeace9
The quick fox
#aeace9 · 9.88:1
AAA on blackalready passes
#aeace9

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #8F8CE0 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
#aeace9 on white: 2.13:1
AA ✗ fail · AA-large · AAA
Aa
#aeace9 on black: 9.88:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #aeace9 as text on that neutral, and that neutral as text on #aeace9.

NeutralRatioBoth directions
White2.13:1AaAa
Slate 502.03:1AaAa
Slate 1001.94:1AaAa
Slate 2001.72:1AaAa
Slate 3001.43:1AaAa
Slate 4001.21:1AaAa
Slate 5002.24:1AaAa
Slate 6003.56:1AaAa
Slate 7004.87:1AaAa
Slate 8006.88:1AaAa
Slate 9008.40:1AaAa
Black9.88:1AaAa
Colour vision deficiency
true color
protanopia · #9CB4EC
deuteranopia · #9AB0E7
tritanopia · #A1B7C1

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. #aeace9 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.

#F4F4FB
#E9E9F7
#CECDEF
#aeace9
#7D7ADC
#524ED0
#3833C2
#2F2BA1
#252281
#1F1C5E
#13123B
Base = 300Lightest = 50 · #F4F4FBDarkest = 950 · #13123BText step on white = 500
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 0.022 285.7);
  --brand-100: oklch(0.94 0.035 285.7);
  --brand-200: oklch(0.88 0.052 285.7);
  --brand-300: oklch(0.80 0.068 285.7);
  --brand-400: oklch(0.72 0.080 285.7);
  --brand-500: oklch(0.64 0.087 285.7);
  --brand-600: oklch(0.56 0.087 285.7);
  --brand-700: oklch(0.48 0.081 285.7);
  --brand-800: oklch(0.40 0.073 285.7);
  --brand-900: oklch(0.32 0.061 285.7);
  --brand-950: oklch(0.24 0.048 285.7);
}

Colors that work with #aeace9

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#F4F4FA
Tinted page background
Border#C1C0ED
Hairlines and dividers
Muted text#4D4B9B
Captions on the surface
Accent#A58A27
Second voice, not a rival
Dark variant#1D1B65
Hover, pressed, headers
Light variant#EBEBFA
Selected rows, tints
Dark surface#141424
Dark-mode background
Hover#9290E2
One step down in lightness
Pressed#7774DA
Two steps down
Disabled#F3F3F7
Chroma pulled out
Focus ring#BAB8F1
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 #aeace9

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 #1D1B65
Safe as a 1px border on white
No — use #8F8CE0

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
  • Weight21/100
  • 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#E7E9AC
Analogous left#ACC8E9
Analogous right#CDACE9
Split-complement 1#E9CDAC
Split-complement 2#C8E9AC
Triadic 1#E9AEAC
Triadic 2#ACE9AE
Tetradic#E9ACC8
On the wheel
Base+30°−30°+120°+240°+180°242°

#aeace9 sits at 242°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red68.2%
Green67.5%
Blue91.4%
R · 0–255
174
0xae
G · 0–255
172
0xac
B · 0–255
233
0xe9

CMYK percentages

Cyan25.3%
Magenta26.2%
Yellow0.0%
Key (black)8.6%

Total ink coverage is 60%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#aeace9 text on a black background

contrast 9.88:1

Card sample

#aeace9 text on a white background

contrast 2.13:1

Card sample

#aeace9 on grey

1.94:1

#aeace9 on its own surface

1.94:1

#aeace9 on its dark surface

8.55:1

CSS3 live lab

Text font color

The quick brown fox

color: #aeace9;
Background color
Panel with #aeace9 background
background-color: #aeace9;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #aeace9;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(174, 172, 233, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(174, 172, 233, 0.45);
Border & gradient
Gradient panel
border: 3px solid #aeace9;
background: linear-gradient(135deg, #aeace9, #D7ACE9);
Gradient text

Gradient headline

background: linear-gradient(90deg, #aeace9, #E6ACE9);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #aeace9;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #aeace9;
caret-color: #aeace9;
Left rule
Pull quote or callout
border-left: 4px solid #aeace9;
Ring + tint
Selected chip
background: #EBEBFA;
box-shadow: inset 0 0 0 2px #aeace9;
Conic badge
68%
background: conic-gradient(#aeace9 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #aeace9 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(174, 172, 233, 0.5)
rgb(174 172 233 / 50%)
#aeace980
hsl(242 58% 79% / 50%)
color-mix(in srgb, #aeace9 50%, transparent)
Alpha8-digit hexFlat on white
10%#aeace91a#F7F7FD
20%#aeace933#EFEEFB
40%#aeace966#DFDEF6
60%#aeace999#CECDF2
80%#aeace9cc#BEBDED

Gradients from #aeace9

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, #DDDCF6, #aeace9 45%, #1D1B65);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #aeace9, #D294E3);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #aeace9, #E7E9AC);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #F3F3FC 0%, #aeace9 45%, #1D1B65 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F4F4FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #D4E6F4 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #DFC4EF 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #1D1B65 0%, transparent 65%), #aeace9;

Monochromatic scale

Palettes built from #aeace9

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.

#aeace9 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 9.88:1.

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.

#aeace9, answered

What color is #aeace9?

#aeace9 is a light vivid blue, closest to Light Steel Blue (ΔE2000 10.5). It sits at 242° on the hue wheel with 58% saturation and 79% lightness, which reads as cool.

What is the RGB value of #aeace9?

rgb(174, 172, 233) — 174 red, 172 green and 233 blue out of 255, or 68.2% / 67.5% / 91.4% by channel.

What is #aeace9 in HSL and HSV?

hsl(242, 58%, 79%) and hsv(242, 26%, 91%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #aeace9 a light or a dark color?

It is a mid-tone. Relative luminance is 0.4439 and perceived brightness is 71%, so black text on it reaches 9.88:1.

Should I use black or white text on #aeace9?

Black. It scores 9.88:1 against #aeace9, versus 2.13:1 for white — AAA at any size.

Is #aeace9 accessible on a white background?

#aeace9 on white scores 2.13:1, which fails WCAG AA at every size. Darken it to #6B67D7 to reach 4.5:1, or #4843CD for 7:1.

What is the complementary color of #aeace9?

#E7E9AC sits directly opposite on the wheel. Softer options are the split-complements #E9CDAC and #C8E9AC, which give the same contrast with far less vibration.

What colors go well with #aeace9?

For interface work: #F4F4FA as the surface, #C1C0ED for borders, #4D4B9B for secondary text, #A58A27 as an accent and #1D1B65 for hover and pressed states. For a palette, the analogous pair #ACC8E9 and #CDACE9 stays calm, while #E7E9AC is the loudest partner.

What is #aeace9 in CMYK for printing?

cmyk(25%, 26%, 0%, 9%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #aeace9 warm or cool?

Cool — it scores 82 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #C4ACE9; nudged cooler, #ABC0EA.

Which Tailwind color is closest to #aeace9?

The blue family — its 500 step is #3b82f6, ΔE2000 20.5 away. That is a visible difference, so define #aeace9 as a custom token rather than reaching for the built-in.

How do I use #aeace9 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#aeace9] or text-[#aeace9], 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 #aeace9 with 50% opacity?

rgba(174, 172, 233, 0.5), or #aeace980 in eight-digit hex. Over white that composites to #D7D6F4; over black, #575675.

Is #aeace9 a web-safe color?

No. The nearest web-safe colour is #9999FF, ΔE2000 8.4 away. The palette only matters for legacy displays and some email clients now.

What does the color #aeace9 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 #aeace9?

The safest is same-hue elevation: linear-gradient(135deg, #DDDCF6, #aeace9 45%, #1D1B65). For more colour, a short hue run to #D294E3 keeps it rich without turning muddy.

Work with #aeace9 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #aeace9 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.