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blue · cool

#8c9baf

a balanced, soft blue · cool · closest name: Light Slate Gray

Token name suggestion: Atlas Sapphire

RGB
140, 155, 175
HSL
214°, 18%, 62%
CMYK
20, 11, 0, 31
Luminance
0.3211

#8c9baf is a balanced soft blue, 214° on the wheel and 74/100 on the cool side. Put black text on it (7.42:1). As text it scores 2.83:1 on white — use #647790 instead. Nearest name is Light Slate Gray, nearest Tailwind family is slate.

hsl(214 18% 62%)rgb(140 155 175)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #8c9baf is made of, how bright it looks, and which way it leans.

Hex
#8c9baf
Hue
214°
blue
Saturation
18%
soft
Lightness
62%
balanced
Brightness
69%
HSV value
Perceived
60%
weighted brightness
Luminance
0.3211
WCAG relative
Temperature
Cool
74/100 cool
Color family
Blue
Tone
Soft
Best ink
Black
7.42:1
Closest name
Light Slate Gray
ΔE2000 6.9
Chroma
12.2
LCH, 0–130ish
OKLCH L
0.684
perceptual lightness
Tailwind
slate
500 · ΔE 14.2
Web-safe
#999999
nearest of 216
Where it sits
Hue214° of 360°
Saturation18%
Lightness62%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #8c9baf.

Temperature
Warm ← → Cool74% 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
Red17%
Green73%
Blue10%

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

Every format

HEX#8c9baf
HEX (8-digit)#8c9bafff
RGBrgb(140, 155, 175)
RGBArgba(140, 155, 175, 1)
HSLhsl(214, 18%, 62%)
HSV / HSBhsv(214, 20%, 69%)
HWBhwb(214 55% 31%)
CMYKcmyk(20%, 11%, 0%, 31%)
LABlab(63.4 -0.9 -12.2)
LCHlch(63.4 12.2 265.6)
OKLCHoklch(0.684 0.034 255.6)
XYZ (D65)xyz(30.27, 32.11, 45.15)
Decimal9214895
Display P3color(display-p3 0.549 0.608 0.686)
Web-safe#999999

Copy-ready code

every platformclick to select
/* CSS */
color: #8c9baf;
background-color: #8c9baf;
/* CSS custom property */
--brand: #8c9baf;
/* Tailwind (arbitrary) */
class="text-[#8c9baf] bg-[#8c9baf]"
/* SCSS */
$brand: #8c9baf;
/* SwiftUI */
Color(red: 0.549, green: 0.608, blue: 0.686)
/* UIKit */
UIColor(red: 0.549, green: 0.608, blue: 0.686, alpha: 1)
/* Android XML */
<color name="brand">#8C9BAF</color>
/* Android Compose */
Color(0xFF8C9BAF)
/* Flutter */
Color(0xFF8C9BAF)
/* Python / OpenCV (BGR) */
(175, 155, 140)
/* Python / PIL (RGB) */
(140, 155, 175)
/* Java AWT */
new Color(140, 155, 175)
/* .NET */
Color.FromArgb(255, 140, 155, 175)
/* OpenGL / Unity (0–1) */
(0.5490f, 0.6078f, 0.6863f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{140,155,175}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #8c9baf 85%, white);
border-color: color-mix(in oklab, #8c9baf 40%, transparent);
/* theme-aware in one line */
color: light-dark(#343E4B, #DBE0E6);
/* relative colour syntax */
--hover: hsl(from #8c9baf 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: #F6F7F8;
  --brand-100: #EEEFF2;
  --brand-200: #D9DDE3;
  --brand-300: #BDC5D1;
  --brand-400: #8c9baf;
  --brand-500: #7B8CA3;
  --brand-600: #647790;
  --brand-700: #546378;
  --brand-800: #435060;
  --brand-900: #333C47;
  --brand-950: #20252D;
  --brand: #8c9baf;
  --brand-ink: #000000;
  --brand-surface: #F6F7F9;
  --brand-border: #CFD5DE;
  --brand-hover: #7789A0;
  --brand-pressed: #647790;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #171B21;
    --brand-ink: #DBE0E6;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F6F7F8',
        100: '#EEEFF2',
        200: '#D9DDE3',
        300: '#BDC5D1',
        400: '#8c9baf',
        500: '#7B8CA3',
        600: '#647790',
        700: '#546378',
        800: '#435060',
        900: '#333C47',
        950: '#20252D',
        DEFAULT: '#8c9baf',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F6F7F8,
  '100': #EEEFF2,
  '200': #D9DDE3,
  '300': #BDC5D1,
  '400': #8c9baf,
  '500': #7B8CA3,
  '600': #647790,
  '700': #546378,
  '800': #435060,
  '900': #333C47,
  '950': #20252D,
);
$brand-base: #8c9baf;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F6F7F8", "$type": "color" },
      "100": { "$value": "#EEEFF2", "$type": "color" },
      "200": { "$value": "#D9DDE3", "$type": "color" },
      "300": { "$value": "#BDC5D1", "$type": "color" },
      "400": { "$value": "#8c9baf", "$type": "color" },
      "500": { "$value": "#7B8CA3", "$type": "color" },
      "600": { "$value": "#647790", "$type": "color" },
      "700": { "$value": "#546378", "$type": "color" },
      "800": { "$value": "#435060", "$type": "color" },
      "900": { "$value": "#333C47", "$type": "color" },
      "950": { "$value": "#20252D", "$type": "color" }
    },
    "brandInk": { "$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 #8c9baf · 7.42:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.83:1
AA fail · AA large fail · AAA fail
Aa
Black text · 7.42:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #8c9baf as text scores 2.83:1 on white and 7.42:1 on black.
Best tinted ink on it, if plain black or white feels flat: #343E4B at 3.83:1.

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
#647790 · 4.58:1
AA on white−14% L
#647790
The quick fox
#4B596C · 7.13:1
AAA on white−26% L
#4B596C
The quick fox
#8c9baf · 7.42:1
AA on blackalready passes
#8c9baf
The quick fox
#8c9baf · 7.42:1
AAA on blackalready passes
#8c9baf

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #8696AB 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
#8c9baf on white: 2.83:1
AA ✗ fail · AA-large · AAA
Aa
#8c9baf on black: 7.42:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #8c9baf as text on that neutral, and that neutral as text on #8c9baf.

NeutralRatioBoth directions
White2.83:1AaAa
Slate 502.70:1AaAa
Slate 1002.58:1AaAa
Slate 2002.29:1AaAa
Slate 3001.91:1AaAa
Slate 4001.10:1AaAa
Slate 5001.68:1AaAa
Slate 6002.68:1AaAa
Slate 7003.66:1AaAa
Slate 8005.17:1AaAa
Slate 9006.31:1AaAa
Black7.42:1AaAa
Colour vision deficiency
true color
protanopia · #949CB0
deuteranopia · #9098AF
tritanopia · #839FA1

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. #8c9baf is pinned to step 400; the rest hold its hue and let saturation ease off at the extremes so the pale end never turns neon.

#F6F7F8
#EEEFF2
#D9DDE3
#BDC5D1
#8c9baf
#7B8CA3
#647790
#546378
#435060
#333C47
#20252D
Base = 400Lightest = 50 · #F6F7F8Darkest = 950 · #20252DText 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 0.009 255.6);
  --brand-100: oklch(0.94 0.014 255.6);
  --brand-200: oklch(0.88 0.021 255.6);
  --brand-300: oklch(0.80 0.027 255.6);
  --brand-400: oklch(0.72 0.031 255.6);
  --brand-500: oklch(0.64 0.034 255.6);
  --brand-600: oklch(0.56 0.034 255.6);
  --brand-700: oklch(0.48 0.032 255.6);
  --brand-800: oklch(0.40 0.029 255.6);
  --brand-900: oklch(0.32 0.024 255.6);
  --brand-950: oklch(0.24 0.019 255.6);
}

Colors that work with #8c9baf

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#F6F7F9
Tinted page background
Border#CFD5DE
Hairlines and dividers
Muted text#5E7087
Captions on the surface
Accent#7D5E4F
Second voice, not a rival
Dark variant#343E4B
Hover, pressed, headers
Light variant#F0F2F5
Selected rows, tints
Dark surface#171B21
Dark-mode background
Hover#7789A0
One step down in lightness
Pressed#647790
Two steps down
Disabled#CED5DD
Chroma pulled out
Focus ring#8FA4C0
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 #8c9baf

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

Works well for
  • Text and icons on dark surfaces
  • Charts, tags and secondary surfaces
  • Brand accents, badges and data highlights
  • Chart series and data categories
Use with care
  • Text of any size on white — fails WCAG AA
  • 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 #343E4B
Safe as a 1px border on white
No — use #8696AB

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
  • Weight38/100
  • 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#AFA08C
Analogous left#8CADAF
Analogous right#8F8CAF
Split-complement 1#AF8F8C
Split-complement 2#ADAF8C
Triadic 1#AF8C9B
Triadic 2#9BAF8C
Tetradic#AF8CAD
On the wheel
Base+30°−30°+120°+240°+180°214°

#8c9baf sits at 214°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red54.9%
Green60.8%
Blue68.6%
R · 0–255
140
0x8c
G · 0–255
155
0x9b
B · 0–255
175
0xaf

CMYK percentages

Cyan20.0%
Magenta11.4%
Yellow0.0%
Key (black)31.4%

Total ink coverage is 63%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#8c9baf text on a black background

contrast 7.42:1

Card sample

#8c9baf text on a white background

contrast 2.83:1

Card sample

#8c9baf on grey

2.58:1

#8c9baf on its own surface

2.64:1

#8c9baf on its dark surface

6.11:1

CSS3 live lab

Text font color

The quick brown fox

color: #8c9baf;
Background color
Panel with #8c9baf background
background-color: #8c9baf;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #8c9baf;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(140, 155, 175, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(140, 155, 175, 0.45);
Border & gradient
Gradient panel
border: 3px solid #8c9baf;
background: linear-gradient(135deg, #8c9baf, #948CAF);
Gradient text

Gradient headline

background: linear-gradient(90deg, #8c9baf, #9D8CAF);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #8c9baf;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #8c9baf;
caret-color: #8c9baf;
Left rule
Pull quote or callout
border-left: 4px solid #8c9baf;
Ring + tint
Selected chip
background: #F0F2F5;
box-shadow: inset 0 0 0 2px #8c9baf;
Conic badge
68%
background: conic-gradient(#8c9baf 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #8c9baf 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(140, 155, 175, 0.5)
rgb(140 155 175 / 50%)
#8c9baf80
hsl(214 18% 62% / 50%)
color-mix(in srgb, #8c9baf 50%, transparent)
Alpha8-digit hexFlat on white
10%#8c9baf1a#F4F5F7
20%#8c9baf33#E8EBEF
40%#8c9baf66#D1D7DF
60%#8c9baf99#BAC3CF
80%#8c9bafcc#A3AFBF

Gradients from #8c9baf

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, #B0BAC8, #8c9baf 45%, #343E4B);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #8c9baf, #877AA2);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #8c9baf, #AFA08C);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #C2CAD5 0%, #8c9baf 45%, #343E4B 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F6F7F9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #AAC4C4 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #A39EBC 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #343E4B 0%, transparent 65%), #8c9baf;

Monochromatic scale

Palettes built from #8c9baf

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.

#8c9baf 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

Usable as-is on a dark surface at 7.42:1.

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.

#8c9baf, answered

What color is #8c9baf?

#8c9baf is a balanced soft blue, closest to Light Slate Gray (ΔE2000 6.9). It sits at 214° on the hue wheel with 18% saturation and 62% lightness, which reads as cool.

What is the RGB value of #8c9baf?

rgb(140, 155, 175) — 140 red, 155 green and 175 blue out of 255, or 54.9% / 60.8% / 68.6% by channel.

What is #8c9baf in HSL and HSV?

hsl(214, 18%, 62%) and hsv(214, 20%, 69%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #8c9baf a light or a dark color?

It is a mid-tone. Relative luminance is 0.3211 and perceived brightness is 60%, so black text on it reaches 7.42:1.

Should I use black or white text on #8c9baf?

Black. It scores 7.42:1 against #8c9baf, versus 2.83:1 for white — AAA at any size.

Is #8c9baf accessible on a white background?

#8c9baf on white scores 2.83:1, which fails WCAG AA at every size. Darken it to #647790 to reach 4.5:1, or #4B596C for 7:1.

What is the complementary color of #8c9baf?

#AFA08C sits directly opposite on the wheel. Softer options are the split-complements #AF8F8C and #ADAF8C, which give the same contrast with far less vibration.

What colors go well with #8c9baf?

For interface work: #F6F7F9 as the surface, #CFD5DE for borders, #5E7087 for secondary text, #7D5E4F as an accent and #343E4B for hover and pressed states. For a palette, the analogous pair #8CADAF and #8F8CAF stays calm, while #AFA08C is the loudest partner.

What is #8c9baf in CMYK for printing?

cmyk(20%, 11%, 0%, 31%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #8c9baf warm or cool?

Cool — it scores 74 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #8C8EAF; nudged cooler, #7B8FA7.

Which Tailwind color is closest to #8c9baf?

The slate family — its 500 step is #64748b, ΔE2000 14.2 away. That is a visible difference, so define #8c9baf as a custom token rather than reaching for the built-in.

How do I use #8c9baf in Tailwind CSS?

Inline it as an arbitrary value with bg-[#8c9baf] or text-[#8c9baf], 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 #8c9baf with 50% opacity?

rgba(140, 155, 175, 0.5), or #8c9baf80 in eight-digit hex. Over white that composites to #C6CDD7; over black, #464E58.

Is #8c9baf a web-safe color?

No. The nearest web-safe colour is #999999, ΔE2000 9.6 away. The palette only matters for legacy displays and some email clients now.

What does the color #8c9baf 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 #8c9baf?

The safest is same-hue elevation: linear-gradient(135deg, #B0BAC8, #8c9baf 45%, #343E4B). For more colour, a short hue run to #877AA2 keeps it rich without turning muddy.

Work with #8c9baf in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #8c9baf at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.