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blue · cool

#554daf

a balanced, soft blue · cool · closest name: Slate Blue

Token name suggestion: Atlas Cobalt

RGB
85, 77, 175
HSL
245°, 39%, 49%
CMYK
51, 56, 0, 31
Luminance
0.1033

#554daf is a balanced soft blue, 245° on the wheel and 81/100 on the cool side. Put white text on it (6.85:1). As text it scores 6.85:1 on white — safe at any size. Nearest name is Slate Blue, nearest Tailwind family is indigo.

hsl(245 39% 49%)rgb(85 77 175)Base step 600AA inkCool

At a glance

Every number on this page in one read: what #554daf is made of, how bright it looks, and which way it leans.

Hex
#554daf
Hue
245°
blue
Saturation
39%
soft
Lightness
49%
balanced
Brightness
69%
HSV value
Perceived
37%
weighted brightness
Luminance
0.1033
WCAG relative
Temperature
Cool
81/100 cool
Color family
Blue
Tone
Soft
Best ink
White
6.85:1
Closest name
Slate Blue
ΔE2000 6.6
Chroma
59.7
LCH, 0–130ish
OKLCH L
0.482
perceptual lightness
Tailwind
indigo
500 · ΔE 12.3
Web-safe
#666699
nearest of 216
Where it sits
Hue245° of 360°
Saturation39%
Lightness49%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #554daf.

Temperature
Warm ← → Cool81% 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%
Green51%
Blue30%

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

Every format

HEX#554daf
HEX (8-digit)#554dafff
RGBrgb(85, 77, 175)
RGBArgba(85, 77, 175, 1)
HSLhsl(245, 39%, 49%)
HSV / HSBhsv(245, 56%, 69%)
HWBhwb(245 30% 31%)
CMYKcmyk(51%, 56%, 0%, 31%)
LABlab(38.4 30.3 -51.5)
LCHlch(38.4 59.7 300.5)
OKLCHoklch(0.482 0.151 282.8)
XYZ (D65)xyz(14.14, 10.33, 41.80)
Decimal5590447
Display P3color(display-p3 0.333 0.302 0.686)
Web-safe#666699

Copy-ready code

every platformclick to select
/* CSS */
color: #554daf;
background-color: #554daf;
/* CSS custom property */
--brand: #554daf;
/* Tailwind (arbitrary) */
class="text-[#554daf] bg-[#554daf]"
/* SCSS */
$brand: #554daf;
/* SwiftUI */
Color(red: 0.333, green: 0.302, blue: 0.686)
/* UIKit */
UIColor(red: 0.333, green: 0.302, blue: 0.686, alpha: 1)
/* Android XML */
<color name="brand">#554DAF</color>
/* Android Compose */
Color(0xFF554DAF)
/* Flutter */
Color(0xFF554DAF)
/* Python / OpenCV (BGR) */
(175, 77, 85)
/* Python / PIL (RGB) */
(85, 77, 175)
/* Java AWT */
new Color(85, 77, 175)
/* .NET */
Color.FromArgb(255, 85, 77, 175)
/* OpenGL / Unity (0–1) */
(0.3333f, 0.3020f, 0.6863f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{85,77,175}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #554daf 85%, white);
border-color: color-mix(in oklab, #554daf 40%, transparent);
/* theme-aware in one line */
color: light-dark(#2B2759, #D6D4EC);
/* relative colour syntax */
--hover: hsl(from #554daf 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: #F5F5FA;
  --brand-100: #ECEBF4;
  --brand-200: #D4D3E9;
  --brand-300: #B5B1DD;
  --brand-400: #8F8ACC;
  --brand-500: #6A63BA;
  --brand-600: #554daf;
  --brand-700: #453E8E;
  --brand-800: #373271;
  --brand-900: #2B2753;
  --brand-950: #1B1934;
  --brand: #554daf;
  --brand-ink: #ffffff;
  --brand-surface: #F5F4FA;
  --brand-border: #C9C6E6;
  --brand-hover: #494296;
  --brand-pressed: #3D377D;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #151424;
    --brand-ink: #D6D4EC;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F5F5FA',
        100: '#ECEBF4',
        200: '#D4D3E9',
        300: '#B5B1DD',
        400: '#8F8ACC',
        500: '#6A63BA',
        600: '#554daf',
        700: '#453E8E',
        800: '#373271',
        900: '#2B2753',
        950: '#1B1934',
        DEFAULT: '#554daf',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F5F5FA,
  '100': #ECEBF4,
  '200': #D4D3E9,
  '300': #B5B1DD,
  '400': #8F8ACC,
  '500': #6A63BA,
  '600': #554daf,
  '700': #453E8E,
  '800': #373271,
  '900': #2B2753,
  '950': #1B1934,
);
$brand-base: #554daf;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F5F5FA", "$type": "color" },
      "100": { "$value": "#ECEBF4", "$type": "color" },
      "200": { "$value": "#D4D3E9", "$type": "color" },
      "300": { "$value": "#B5B1DD", "$type": "color" },
      "400": { "$value": "#8F8ACC", "$type": "color" },
      "500": { "$value": "#6A63BA", "$type": "color" },
      "600": { "$value": "#554daf", "$type": "color" },
      "700": { "$value": "#453E8E", "$type": "color" },
      "800": { "$value": "#373271", "$type": "color" },
      "900": { "$value": "#2B2753", "$type": "color" },
      "950": { "$value": "#1B1934", "$type": "color" }
    },
    "brandInk": { "$value": "#ffffff", "$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#ffffff on #554daf · 6.85:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 6.85:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.07:1
AA fail · AA large pass · AAA fail
Reading the other direction: #554daf as text scores 6.85:1 on white and 3.07:1 on black.
Best tinted ink on it, if plain black or white feels flat: #EEEDF7 at 5.90:1.

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
#554daf · 6.85:1
AA on whitealready passes
#554daf
The quick fox
#534BAB · 7.09:1
AAA on white−1% L
#534BAB
The quick fox
#726CBE · 4.60:1
AA on black+9% L
#726CBE
The quick fox
#948FCE · 7.08:1
AAA on black+19% L
#948FCE

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #554DAF 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
#554daf on white: 6.85:1
AA ✓ pass · AA-large · AAA
Aa
#554daf on black: 3.07:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #554daf as text on that neutral, and that neutral as text on #554daf.

NeutralRatioBoth directions
White6.85:1AaAa
Slate 506.54:1AaAa
Slate 1006.25:1AaAa
Slate 2005.55:1AaAa
Slate 3004.61:1AaAa
Slate 4002.67:1AaAa
Slate 5001.44:1AaAa
Slate 6001.11:1AaAa
Slate 7001.51:1AaAa
Slate 8002.14:1AaAa
Slate 9002.61:1AaAa
Black3.07:1AaAa
Colour vision deficiency
true color
protanopia · #0D5EB2
deuteranopia · #0057AD
tritanopia · #326376

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. #554daf is pinned to step 600; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F5F5FA
#ECEBF4
#D4D3E9
#B5B1DD
#8F8ACC
#6A63BA
#554daf
#453E8E
#373271
#2B2753
#1B1934
Base = 600Lightest = 50 · #F5F5FADarkest = 950 · #1B1934Text 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 0.038 282.8);
  --brand-100: oklch(0.94 0.060 282.8);
  --brand-200: oklch(0.88 0.091 282.8);
  --brand-300: oklch(0.80 0.118 282.8);
  --brand-400: oklch(0.72 0.139 282.8);
  --brand-500: oklch(0.64 0.151 282.8);
  --brand-600: oklch(0.56 0.151 282.8);
  --brand-700: oklch(0.48 0.142 282.8);
  --brand-800: oklch(0.40 0.127 282.8);
  --brand-900: oklch(0.32 0.106 282.8);
  --brand-950: oklch(0.24 0.083 282.8);
}

Colors that work with #554daf

Not a palette — a role sheet. Each swatch answers one question you will hit while building the component.

Text on it#ffffff
White wins here
Surface#F5F4FA
Tinted page background
Border#C9C6E6
Hairlines and dividers
Muted text#514B9B
Captions on the surface
Accent#92833A
Second voice, not a rival
Dark variant#2B2759
Hover, pressed, headers
Light variant#EEEDF7
Selected rows, tints
Dark surface#151424
Dark-mode background
Hover#494296
One step down in lightness
Pressed#3D377D
Two steps down
Disabled#A9A6C6
Chroma pulled out
Focus ring#584EC2
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 #554daf

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

Works well for
  • Body text and links on white
  • Charts, tags and secondary surfaces
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Pairing with a same-lightness hue — edges vibrate
Minimum size as text on white
Any size
Safe as a fill behind white type
Yes
Safe as a 1px border on white
Yes

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 mid lightness keeps it versatile in both themes.

Worth knowing

It is also the most crowded hue on the web. Distinctiveness has to come from your other choices.

Reads as
  • FormalityMedium
  • EnergyMedium
  • Weight51/100
  • 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#A7AF4D
Analogous left#4D76AF
Analogous right#864DAF
Split-complement 1#AF864D
Split-complement 2#76AF4D
Triadic 1#AF554D
Triadic 2#4DAF55
Tetradic#AF4D76
On the wheel
Base+30°−30°+120°+240°+180°245°

#554daf sits at 245°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red33.3%
Green30.2%
Blue68.6%
R · 0–255
85
0x55
G · 0–255
77
0x4d
B · 0–255
175
0xaf

CMYK percentages

Cyan51.4%
Magenta56.0%
Yellow0.0%
Key (black)31.4%

Total ink coverage is 139%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#554daf text on a black background

contrast 3.07:1

Card sample

#554daf text on a white background

contrast 6.85:1

Card sample

#554daf on grey

6.25:1

#554daf on its own surface

6.26:1

#554daf on its dark surface

2.65:1

CSS3 live lab

Text font color

The quick brown fox

color: #554daf;
Background color
Panel with #554daf background
background-color: #554daf;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #554daf;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(85, 77, 175, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(85, 77, 175, 0.45);
Border & gradient
Gradient panel
border: 3px solid #554daf;
background: linear-gradient(135deg, #554daf, #964DAF);
Gradient text

Gradient headline

background: linear-gradient(90deg, #554daf, #AF4DAF);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #554daf;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #554daf;
caret-color: #554daf;
Left rule
Pull quote or callout
border-left: 4px solid #554daf;
Ring + tint
Selected chip
background: #EEEDF7;
box-shadow: inset 0 0 0 2px #554daf;
Conic badge
68%
background: conic-gradient(#554daf 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #554daf 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(85, 77, 175, 0.5)
rgb(85 77 175 / 50%)
#554daf80
hsl(245 39% 49% / 50%)
color-mix(in srgb, #554daf 50%, transparent)
Alpha8-digit hexFlat on white
10%#554daf1a#EEEDF7
20%#554daf33#DDDBEF
40%#554daf66#BBB8DF
60%#554daf99#9994CF
80%#554dafcc#7771BF

Gradients from #554daf

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, #7D76C3, #554daf 45%, #2B2759);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #554daf, #8B449A);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #554daf, #A7AF4D);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #918CCC 0%, #554daf 45%, #2B2759 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F5F4FA, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #6F98C0 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #9C61BA 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #2B2759 0%, transparent 65%), #554daf;

Monochromatic scale

Palettes built from #554daf

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.

#554daf 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
ButtonsLinksFocus statesCharts
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

Too dim on dark surfaces at 3.07:1 — lift it to #726CBE for body text, or reserve it for fills.

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.

#554daf, answered

What color is #554daf?

#554daf is a balanced soft blue, closest to Slate Blue (ΔE2000 6.6). It sits at 245° on the hue wheel with 39% saturation and 49% lightness, which reads as cool.

What is the RGB value of #554daf?

rgb(85, 77, 175) — 85 red, 77 green and 175 blue out of 255, or 33.3% / 30.2% / 68.6% by channel.

What is #554daf in HSL and HSV?

hsl(245, 39%, 49%) and hsv(245, 56%, 69%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #554daf a light or a dark color?

It is a dark color. Relative luminance is 0.1033 and perceived brightness is 37%, so white text on it reaches 6.85:1.

Should I use black or white text on #554daf?

White. It scores 6.85:1 against #554daf, versus 3.07:1 for black — AA at any size.

Is #554daf accessible on a white background?

#554daf on white scores 6.85:1, which clears AA at every size but not AAA.

What is the complementary color of #554daf?

#A7AF4D sits directly opposite on the wheel. Softer options are the split-complements #AF864D and #76AF4D, which give the same contrast with far less vibration.

What colors go well with #554daf?

For interface work: #F5F4FA as the surface, #C9C6E6 for borders, #514B9B for secondary text, #92833A as an accent and #2B2759 for hover and pressed states. For a palette, the analogous pair #4D76AF and #864DAF stays calm, while #A7AF4D is the loudest partner.

What is #554daf in CMYK for printing?

cmyk(51%, 56%, 0%, 31%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #554daf warm or cool?

Cool — it scores 81 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #794DAF; nudged cooler, #4A68B1.

Which Tailwind color is closest to #554daf?

The indigo family — its 500 step is #6366f1, ΔE2000 12.3 away. That is a visible difference, so define #554daf as a custom token rather than reaching for the built-in.

How do I use #554daf in Tailwind CSS?

Inline it as an arbitrary value with bg-[#554daf] or text-[#554daf], 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 #554daf with 50% opacity?

rgba(85, 77, 175, 0.5), or #554daf80 in eight-digit hex. Over white that composites to #AAA6D7; over black, #2B2758.

Is #554daf a web-safe color?

No. The nearest web-safe colour is #666699, ΔE2000 10.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #554daf 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 #554daf?

The safest is same-hue elevation: linear-gradient(135deg, #7D76C3, #554daf 45%, #2B2759). For more colour, a short hue run to #8B449A keeps it rich without turning muddy.

Work with #554daf in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #554daf at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.