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Cool Gray Core
Color detail

Cool Gray Core

Neutral gray · Hue 210
Metrics
S 6% · L 48%
Contrast (WCAG)
on white4.3:1AA Largeon black4.8:1AA
Save to journalSign in to saveStart palette from thisRecent trail

About this color

Cool Gray Core (#737A82) belongs to the neutral grays — hue 210°, 6% saturation, 48% lightness. Copy the hex, RGB, or HSL value above, or paste the CSS custom property below into your stylesheet to reference this color directly.

CSS
:root {
  --colorarchive-cool-gray-core: #737A82;
  --colorarchive-cool-gray-core-hsl: hsl(210, 6%, 48%);
  --colorarchive-cool-gray-core-rgb: rgb(115, 122, 130);
}

AI Color Names

Let AI suggest alternative poetic names for this color in English and Chinese.

Color Origins

Neutral family

Not a color, but the canvas every color lives on.

Heritage

Bone black, lamp black, and ivory black are the classical pigment lineage of black, with Mars black a 20th-century addition; lead white (now heavily restricted), zinc white, and titanium white are the whites; and every gray sits between them. Charcoal and graphite extend the lineage. Painters historically mixed their warm and cool grays rather than taking them from a tube — Vermeer tinted grays of lead white, black, and umber with ultramarine. Scandinavian and Japanese design traditions have refined the use of pure neutrals to the point of philosophy.

Across cultures

In Western culture black is mourning (since the Roman Empire), formal (since late-medieval European courts), and rebellious (since 20th-century counterculture). In China and much of East Asia white is the traditional funeral color, though Japan has worn black since the Meiji era. Black-and-white photography defined visual journalism for a century. Concrete gray, since Brutalism, has come to read as both serious-civic and dystopian, depending on context. Scandinavian interiors often lean on the calibration of warm vs cool grays.

In the wild

Apple's restraint is essentially a religion of neutrals — white packaging and, since it dropped the rainbow logo in 1999, a single-color Apple mark. Chanel built a fashion empire on black-and-white. Muji's identity is the absence of identity — the name means 'no-brand quality goods', and its color range is deliberately limited. Vercel, Linear, GitHub, and many modern developer tools dial the saturation way down to make their content shine. The film noir aesthetic and modern minimalist branding both converge on neutrals.

How it reads

Pure neutrals (true gray) are eye-rest colors — they carry no hue of their own. Warm neutrals (taupe, warm gray) read as inviting, hospitality-friendly, soft. Cool neutrals (cool gray, slate) read as technical, premium, slightly distant. Off-whites and creams are heritage-luxury colors; near-blacks (charcoal, ink) read as serious without the harshness of pure black. Designers often choose a slightly warm or slightly cool neutral over true gray because it feels more deliberate and human.

This particular tone

A grounded mid-tone — sober, considered, well-suited to body text accents, editorial layouts, or any context where restraint reads as quality.

Lightness band: At mid-lightness the hue carries its full character. This is the band where many identity colors live: bright enough to be distinctive at small sizes, deep enough to sit cleanly on a white canvas.

Saturation band: The low saturation pulls this color toward earthen, vintage, or editorial palettes. It reads as confident and grown-up rather than playful, and it tolerates being used in large blocks without becoming visually noisy.

Brands using a similar color

Within the public brand-guidelines reference catalog, these are the closest matches to #737A82.

  • Notionneutral
    Notion Gray · #787774
    →
  • Microsoftneutral
    Slate Gray · #737373
    →
  • Anthropicaccent
    Anthropic Green · #788C5D
    →

Cultures using a similar color

From the cultural-palette catalog, these regions feature a color close to #737A82.

  • France (Paris)Seine Steel
    #7E8A93 · River reflectivity in winter
    →
  • England (London)Plane Tree Green
    #5C7A5A · Platanus × hispanica, London street tree
    →
  • IrelandAtlantic Slate
    #5A6770 · Cliff face + winter sea
    →

Color guides

Go deeper on using color in design.

UI/UX DesignNeutral Color Palettes: Warm vs Cool and How to ChooseInterface SystemsBuilding Neutral Color Palettes for Design SystemsColor SystemsChromatic Neutrals: Why Gray Is Never Actually Gray in Professional Design

Tonal strip

All lightness levels at this hue and saturation. Click any to navigate.

Palette moves

Instead of stopping at one swatch, use nearby, opposite, and tonal neighbors to branch into a broader palette.

Lighter companion
Cool Gray Radiant
#838A91 · hsl(210, 6%, 54%)
Darker companion
Cool Gray Velvet
#656B72 · hsl(210, 6%, 42%)
Complementary counterpoint
Warm Gray Core
#827A73 · hsl(30, 6%, 48%)
Analogous lead
Indigo Core Faint
#6E7287 · hsl(230, 10%, 48%)
Analogous echo
Cerulean Core Faint
#6E8387 · hsl(190, 10%, 48%)
Triadic +120°
Blush Core Faint
#876E7A · hsl(330, 10%, 48%)
Triadic +240°
Lime Core Faint
#7A876E · hsl(90, 10%, 48%)
Split-comp +150°
Crimson Core Faint
#876E6E · hsl(0, 10%, 48%)
Split-comp +210°
Citrine Core Faint
#87876E · hsl(60, 10%, 48%)
Export preview
Base: Cool Gray Core #737A82
Lighter companion: Cool Gray Radiant #838A91
Darker companion: Cool Gray Velvet #656B72
Complementary counterpoint: Warm Gray Core #827A73
Analogous lead: Indigo Core Faint #6E7287
Analogous echo: Cerulean Core Faint #6E8387
Triadic +120°: Blush Core Faint #876E7A
Triadic +240°: Lime Core Faint #7A876E
Split-comp +150°: Crimson Core Faint #876E6E
Split-comp +210°: Citrine Core Faint #87876E

Compare

See how Cool Gray Core compares side by side with related colors.

vsCool Gray RadiantvsCool Gray VelvetvsWarm Gray CorevsIndigo Core FaintvsCerulean Core FaintvsBlush Core Faint

Nearest neighbors

The closest archive matches by hue, saturation, and lightness.

Search by hex
Nearby match
Sapphire Core Faint
#6E7A87 · hsl(210, 10%, 48%)
Nearby match
Cool Gray Velvet
#656B72 · hsl(210, 6%, 42%)
Nearby match
Cool Gray Radiant
#838A91 · hsl(210, 6%, 54%)
Nearby match
Sapphire Core Muted
#647A90 · hsl(210, 18%, 48%)
Nearby match
Sapphire Velvet Faint
#606B76 · hsl(210, 10%, 42%)
Nearby match
Sapphire Radiant Faint
#7E8A95 · hsl(210, 10%, 54%)

Accessible pairings

Archive colors that meet WCAG contrast standards when paired with this color. Use as text-on-background or background-on-text.

Contrast checker
AA Large4.2:1
Coral Veil Faint
#FAFAF9
AA Large4.2:1
Coral Veil Muted
#FBFAF9
AA Large4.2:1
Coral Veil Dust
#FBFAF9
AA Large4.2:1
Coral Veil Soft
#FCFAF8
AA Large4.2:1
Coral Veil Clear
#FDFAF7
AA Large4.2:1
Coral Veil Vivid
#FEFAF6

Color Vision Simulation

How this color appears with different color vision deficiencies.

Full simulator
Deuteranopia
#767580
Protanopia
#767680
Tritanopia
#737F7E
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Saturation ladder

Same hue and lightness, from gray to pure

Search
Cool Gray Core#737A82 · hsl(210, 6%, 48%)Sapphire Core Faint#6E7A87 · hsl(210, 10%, 48%)Sapphire Core Muted#647A90 · hsl(210, 18%, 48%)Sapphire Core Dust#5B7A9A · hsl(210, 26%, 48%)Sapphire Core Soft#517AA4 · hsl(210, 34%, 48%)Sapphire Core Clear#387ABC · hsl(210, 54%, 48%)Sapphire Core Vivid#207AD5 · hsl(210, 74%, 48%)Sapphire Core Bright#147AE1 · hsl(210, 84%, 48%)Sapphire Core Pure#0A7AEB · hsl(210, 92%, 48%)
Appears in collections
Transit AuthorityDark Mode UI Surfaces