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blue · cool

#525966

a dark, muted blue · cool · closest name: Dim Gray

Token name suggestion: Forest Cobalt

RGB
82, 89, 102
HSL
219°, 11%, 36%
CMYK
20, 13, 0, 60
Luminance
0.0990

#525966 is a dark muted blue, 219° on the wheel and 64/100 on the cool side. Put white text on it (7.05:1). As text it scores 7.05:1 on white — safe at any size. Nearest name is Dim Gray, nearest Tailwind family is gray.

hsl(219 11% 36%)rgb(82 89 102)Base step 700AAA inkCool

At a glance

Every number on this page in one read: what #525966 is made of, how bright it looks, and which way it leans.

Hex
#525966
Hue
219°
blue
Saturation
11%
muted
Lightness
36%
dark
Brightness
40%
HSV value
Perceived
35%
weighted brightness
Luminance
0.0990
WCAG relative
Temperature
Cool
64/100 cool
Color family
Blue
Tone
Muted
Best ink
White
7.05:1
Closest name
Dim Gray
ΔE2000 9.3
Chroma
8.4
LCH, 0–130ish
OKLCH L
0.463
perceptual lightness
Tailwind
gray
500 · ΔE 9.4
Web-safe
#666666
nearest of 216
Where it sits
Hue219° of 360°
Saturation11%
Lightness36%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #525966.

Temperature
Warm ← → Cool64% 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
Red18%
Green72%
Blue10%

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

Every format

HEX#525966
HEX (8-digit)#525966ff
RGBrgb(82, 89, 102)
RGBArgba(82, 89, 102, 1)
HSLhsl(219, 11%, 36%)
HSV / HSBhsv(219, 20%, 40%)
HWBhwb(219 32% 60%)
CMYKcmyk(20%, 13%, 0%, 60%)
LABlab(37.7 0.3 -8.4)
LCHlch(37.7 8.4 272.4)
OKLCHoklch(0.463 0.023 262.9)
XYZ (D65)xyz(9.45, 9.90, 13.98)
Decimal5396838
Display P3color(display-p3 0.322 0.349 0.400)
Web-safe#666666

Copy-ready code

every platformclick to select
/* CSS */
color: #525966;
background-color: #525966;
/* CSS custom property */
--brand: #525966;
/* Tailwind (arbitrary) */
class="text-[#525966] bg-[#525966]"
/* SCSS */
$brand: #525966;
/* SwiftUI */
Color(red: 0.322, green: 0.349, blue: 0.400)
/* UIKit */
UIColor(red: 0.322, green: 0.349, blue: 0.400, alpha: 1)
/* Android XML */
<color name="brand">#525966</color>
/* Android Compose */
Color(0xFF525966)
/* Flutter */
Color(0xFF525966)
/* Python / OpenCV (BGR) */
(102, 89, 82)
/* Python / PIL (RGB) */
(82, 89, 102)
/* Java AWT */
new Color(82, 89, 102)
/* .NET */
Color.FromArgb(255, 82, 89, 102)
/* OpenGL / Unity (0–1) */
(0.3216f, 0.3490f, 0.4000f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{82,89,102}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #525966 85%, white);
border-color: color-mix(in oklab, #525966 40%, transparent);
/* theme-aware in one line */
color: light-dark(#393E47, #DDDFE4);
/* relative colour syntax */
--hover: hsl(from #525966 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: #F7F7F8;
  --brand-100: #EEEFF1;
  --brand-200: #DBDDE1;
  --brand-300: #C1C5CD;
  --brand-400: #A2A8B4;
  --brand-500: #838B9B;
  --brand-600: #6D7688;
  --brand-700: #525966;
  --brand-800: #494F5A;
  --brand-900: #373B43;
  --brand-950: #22252A;
  --brand: #525966;
  --brand-ink: #ffffff;
  --brand-surface: #F7F7F8;
  --brand-border: #D2D5DB;
  --brand-hover: #424852;
  --brand-pressed: #32373E;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #191B1F;
    --brand-ink: #DDDFE4;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F7F7F8',
        100: '#EEEFF1',
        200: '#DBDDE1',
        300: '#C1C5CD',
        400: '#A2A8B4',
        500: '#838B9B',
        600: '#6D7688',
        700: '#525966',
        800: '#494F5A',
        900: '#373B43',
        950: '#22252A',
        DEFAULT: '#525966',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F7F7F8,
  '100': #EEEFF1,
  '200': #DBDDE1,
  '300': #C1C5CD,
  '400': #A2A8B4,
  '500': #838B9B,
  '600': #6D7688,
  '700': #525966,
  '800': #494F5A,
  '900': #373B43,
  '950': #22252A,
);
$brand-base: #525966;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F7F7F8", "$type": "color" },
      "100": { "$value": "#EEEFF1", "$type": "color" },
      "200": { "$value": "#DBDDE1", "$type": "color" },
      "300": { "$value": "#C1C5CD", "$type": "color" },
      "400": { "$value": "#A2A8B4", "$type": "color" },
      "500": { "$value": "#838B9B", "$type": "color" },
      "600": { "$value": "#6D7688", "$type": "color" },
      "700": { "$value": "#525966", "$type": "color" },
      "800": { "$value": "#494F5A", "$type": "color" },
      "900": { "$value": "#373B43", "$type": "color" },
      "950": { "$value": "#22252A", "$type": "color" }
    },
    "brandInk": { "$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 #525966 · 7.05:1
Use #ffffffAAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 7.05:1 · recommended
AA pass · AA large pass · AAA pass
Aa
Black text · 2.98:1
AA fail · AA large fail · AAA fail
Reading the other direction: #525966 as text scores 7.05:1 on white and 2.98:1 on black.
Best tinted ink on it, if plain black or white feels flat: #F1F2F4 at 6.29:1.

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
#525966 · 7.05:1
AA on whitealready passes
#525966
The quick fox
#525966 · 7.05:1
AAA on whitealready passes
#525966
The quick fox
#6D7788 · 4.64:1
AA on black+12% L
#6D7788
The quick fox
#8E96A4 · 7.05:1
AAA on black+24% L
#8E96A4

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #525966 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
#525966 on white: 7.05:1
AA ✓ pass · AA-large · AAA
Aa
#525966 on black: 2.98:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #525966 as text on that neutral, and that neutral as text on #525966.

NeutralRatioBoth directions
White7.05:1AaAa
Slate 506.74:1AaAa
Slate 1006.43:1AaAa
Slate 2005.72:1AaAa
Slate 3004.75:1AaAa
Slate 4002.75:1AaAa
Slate 5001.48:1AaAa
Slate 6001.08:1AaAa
Slate 7001.47:1AaAa
Slate 8002.08:1AaAa
Slate 9002.53:1AaAa
Black2.98:1AaAa
Colour vision deficiency
true color
protanopia · #555A67
deuteranopia · #535866
tritanopia · #4D5C5D

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. #525966 is pinned to step 700; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F7F7F8
#EEEFF1
#DBDDE1
#C1C5CD
#A2A8B4
#838B9B
#6D7688
#525966
#494F5A
#373B43
#22252A
Base = 700Lightest = 50 · #F7F7F8Darkest = 950 · #22252AText 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 0.006 262.9);
  --brand-100: oklch(0.94 0.009 262.9);
  --brand-200: oklch(0.88 0.014 262.9);
  --brand-300: oklch(0.80 0.018 262.9);
  --brand-400: oklch(0.72 0.021 262.9);
  --brand-500: oklch(0.64 0.023 262.9);
  --brand-600: oklch(0.56 0.023 262.9);
  --brand-700: oklch(0.48 0.022 262.9);
  --brand-800: oklch(0.40 0.019 262.9);
  --brand-900: oklch(0.32 0.016 262.9);
  --brand-950: oklch(0.24 0.013 262.9);
}

Colors that work with #525966

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#F7F7F8
Tinted page background
Border#D2D5DB
Hairlines and dividers
Muted text#666F7F
Captions on the surface
Accent#6A594E
Second voice, not a rival
Dark variant#393E47
Hover, pressed, headers
Light variant#F1F2F4
Selected rows, tints
Dark surface#191B1F
Dark-mode background
Hover#424852
One step down in lightness
Pressed#32373E
Two steps down
Disabled#8991A0
Chroma pulled out
Focus ring#51607C
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 #525966

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

Works well for
  • Body text and links on white
  • Borders, dividers and quiet backgrounds
  • Long-form reading surfaces
  • Headers, footers and dark-mode surfaces
  • Brand accents, badges and data highlights
Use with care
  • Text on black or near-black surfaces
  • Black text placed on it
  • 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.

With almost no chroma left, the family association is barely present; treat it as a neutral that happens to lean this way. The low lightness adds weight and formality.

Worth knowing

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

Reads as
  • FormalityHigh
  • EnergyLow
  • Weight64/100
  • TemperatureCool
  • ApproachabilityBalanced

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#665F52
Analogous left#526366
Analogous right#555266
Split-complement 1#665552
Split-complement 2#636652
Triadic 1#665259
Triadic 2#596652
Tetradic#665263
On the wheel
Base+30°−30°+120°+240°+180°219°

#525966 sits at 219°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red32.2%
Green34.9%
Blue40.0%
R · 0–255
82
0x52
G · 0–255
89
0x59
B · 0–255
102
0x66

CMYK percentages

Cyan19.6%
Magenta12.7%
Yellow0.0%
Key (black)60.0%

Total ink coverage is 92%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#525966 text on a black background

contrast 2.98:1

Card sample

#525966 text on a white background

contrast 7.05:1

Card sample

#525966 on grey

6.43:1

#525966 on its own surface

6.58:1

#525966 on its dark surface

2.45:1

CSS3 live lab

Text font color

The quick brown fox

color: #525966;
Background color
Panel with #525966 background
background-color: #525966;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #525966;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(82, 89, 102, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(82, 89, 102, 0.45);
Border & gradient
Gradient panel
border: 3px solid #525966;
background: linear-gradient(135deg, #525966, #585266);
Gradient text

Gradient headline

background: linear-gradient(90deg, #525966, #5D5266);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #525966;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #525966;
caret-color: #525966;
Left rule
Pull quote or callout
border-left: 4px solid #525966;
Ring + tint
Selected chip
background: #F1F2F4;
box-shadow: inset 0 0 0 2px #525966;
Conic badge
68%
background: conic-gradient(#525966 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #525966 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(82, 89, 102, 0.5)
rgb(82 89 102 / 50%)
#52596680
hsl(219 11% 36% / 50%)
color-mix(in srgb, #525966 50%, transparent)
Alpha8-digit hexFlat on white
10%#5259661a#EEEEF0
20%#52596633#DCDEE0
40%#52596666#BABDC2
60%#52596699#979BA3
80%#525966cc#757A85

Gradients from #525966

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, #6D7788, #525966 45%, #393E47);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #525966, #4B4455);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #525966, #665F52);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #7D8697 0%, #525966 45%, #393E47 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F7F7F8, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #698182 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #656077 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #393E47 0%, transparent 65%), #525966;

Monochromatic scale

Palettes built from #525966

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.

#525966 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
BackgroundsBordersBody textDividers
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 2.98:1 — lift it to #6D7788 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.

#525966, answered

What color is #525966?

#525966 is a dark muted blue, closest to Dim Gray (ΔE2000 9.3). It sits at 219° on the hue wheel with 11% saturation and 36% lightness, which reads as cool.

What is the RGB value of #525966?

rgb(82, 89, 102) — 82 red, 89 green and 102 blue out of 255, or 32.2% / 34.9% / 40% by channel.

What is #525966 in HSL and HSV?

hsl(219, 11%, 36%) and hsv(219, 20%, 40%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #525966 a light or a dark color?

It is a dark color. Relative luminance is 0.0990 and perceived brightness is 35%, so white text on it reaches 7.05:1.

Should I use black or white text on #525966?

White. It scores 7.05:1 against #525966, versus 2.98:1 for black — AAA at any size.

Is #525966 accessible on a white background?

#525966 on white scores 7.05:1, which clears AAA at every size.

What is the complementary color of #525966?

#665F52 sits directly opposite on the wheel. Softer options are the split-complements #665552 and #636652, which give the same contrast with far less vibration.

What colors go well with #525966?

For interface work: #F7F7F8 as the surface, #D2D5DB for borders, #666F7F for secondary text, #6A594E as an accent and #393E47 for hover and pressed states. For a palette, the analogous pair #526366 and #555266 stays calm, while #665F52 is the loudest partner.

What is #525966 in CMYK for printing?

cmyk(20%, 13%, 0%, 60%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #525966 warm or cool?

Cool — it scores 64 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #525266; nudged cooler, #505B68.

Which Tailwind color is closest to #525966?

The gray family — its 500 step is #6b7280, ΔE2000 9.4 away. That is a visible difference, so define #525966 as a custom token rather than reaching for the built-in.

How do I use #525966 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#525966] or text-[#525966], 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 #525966 with 50% opacity?

rgba(82, 89, 102, 0.5), or #52596680 in eight-digit hex. Over white that composites to #A9ACB3; over black, #292D33.

Is #525966 a web-safe color?

No. The nearest web-safe colour is #666666, ΔE2000 8.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #525966 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 low chroma the association is faint; it behaves more like a neutral.

What gradient works with #525966?

The safest is same-hue elevation: linear-gradient(135deg, #6D7788, #525966 45%, #393E47). For more colour, a short hue run to #4B4455 keeps it rich without turning muddy.

Work with #525966 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #525966 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.