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blue · cool

#acb1ba

a light, muted blue · cool · closest name: Dark Gray

Token name suggestion: Drift Cobalt

RGB
172, 177, 186
HSL
219°, 9%, 70%
CMYK
8, 5, 0, 27
Luminance
0.4376

#acb1ba is a light muted blue, 219° on the wheel and 62/100 on the cool side. Put black text on it (9.75:1). As text it scores 2.15:1 on white — use #6D7583 instead. Nearest name is Dark Gray, nearest Tailwind family is neutral.

hsl(219 9% 70%)rgb(172 177 186)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #acb1ba is made of, how bright it looks, and which way it leans.

Hex
#acb1ba
Hue
219°
blue
Saturation
9%
muted
Lightness
70%
light
Brightness
73%
HSV value
Perceived
69%
weighted brightness
Luminance
0.4376
WCAG relative
Temperature
Cool
62/100 cool
Color family
Blue
Tone
Muted
Best ink
Black
9.75:1
Closest name
Dark Gray
ΔE2000 5.1
Chroma
5.2
LCH, 0–130ish
OKLCH L
0.759
perceptual lightness
Tailwind
neutral
500 · ΔE 21.2
Web-safe
#9999CC
nearest of 216
Where it sits
Hue219° of 360°
Saturation9%
Lightness70%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #acb1ba.

Temperature
Warm ← → Cool62% 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%
Green72%
Blue8%

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

Every format

HEX#acb1ba
HEX (8-digit)#acb1baff
RGBrgb(172, 177, 186)
RGBArgba(172, 177, 186, 1)
HSLhsl(219, 9%, 70%)
HSV / HSBhsv(219, 8%, 73%)
HWBhwb(219 67% 27%)
CMYKcmyk(8%, 5%, 0%, 27%)
LABlab(72.1 0.0 -5.2)
LCHlch(72.1 5.2 270.1)
OKLCHoklch(0.759 0.014 262.4)
XYZ (D65)xyz(41.60, 43.76, 52.70)
Decimal11317690
Display P3color(display-p3 0.675 0.694 0.729)
Web-safe#9999CC

Copy-ready code

every platformclick to select
/* CSS */
color: #acb1ba;
background-color: #acb1ba;
/* CSS custom property */
--brand: #acb1ba;
/* Tailwind (arbitrary) */
class="text-[#acb1ba] bg-[#acb1ba]"
/* SCSS */
$brand: #acb1ba;
/* SwiftUI */
Color(red: 0.675, green: 0.694, blue: 0.729)
/* UIKit */
UIColor(red: 0.675, green: 0.694, blue: 0.729, alpha: 1)
/* Android XML */
<color name="brand">#ACB1BA</color>
/* Android Compose */
Color(0xFFACB1BA)
/* Flutter */
Color(0xFFACB1BA)
/* Python / OpenCV (BGR) */
(186, 177, 172)
/* Python / PIL (RGB) */
(172, 177, 186)
/* Java AWT */
new Color(172, 177, 186)
/* .NET */
Color.FromArgb(255, 172, 177, 186)
/* OpenGL / Unity (0–1) */
(0.6745f, 0.6941f, 0.7294f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{172,177,186}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #acb1ba 85%, white);
border-color: color-mix(in oklab, #acb1ba 40%, transparent);
/* theme-aware in one line */
color: light-dark(#3A3E46, #DEE0E3);
/* relative colour syntax */
--hover: hsl(from #acb1ba 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: #EFEFF1;
  --brand-200: #DBDDE1;
  --brand-300: #C2C5CC;
  --brand-400: #acb1ba;
  --brand-500: #848C99;
  --brand-600: #6F7786;
  --brand-700: #5D636F;
  --brand-800: #4A4F59;
  --brand-900: #383C42;
  --brand-950: #232529;
  --brand: #acb1ba;
  --brand-ink: #000000;
  --brand-surface: #F7F7F8;
  --brand-border: #D2D5DA;
  --brand-hover: #999FAA;
  --brand-pressed: #858C9A;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #191B1F;
    --brand-ink: #DEE0E3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F7F7F8',
        100: '#EFEFF1',
        200: '#DBDDE1',
        300: '#C2C5CC',
        400: '#acb1ba',
        500: '#848C99',
        600: '#6F7786',
        700: '#5D636F',
        800: '#4A4F59',
        900: '#383C42',
        950: '#232529',
        DEFAULT: '#acb1ba',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F7F7F8,
  '100': #EFEFF1,
  '200': #DBDDE1,
  '300': #C2C5CC,
  '400': #acb1ba,
  '500': #848C99,
  '600': #6F7786,
  '700': #5D636F,
  '800': #4A4F59,
  '900': #383C42,
  '950': #232529,
);
$brand-base: #acb1ba;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F7F7F8", "$type": "color" },
      "100": { "$value": "#EFEFF1", "$type": "color" },
      "200": { "$value": "#DBDDE1", "$type": "color" },
      "300": { "$value": "#C2C5CC", "$type": "color" },
      "400": { "$value": "#acb1ba", "$type": "color" },
      "500": { "$value": "#848C99", "$type": "color" },
      "600": { "$value": "#6F7786", "$type": "color" },
      "700": { "$value": "#5D636F", "$type": "color" },
      "800": { "$value": "#4A4F59", "$type": "color" },
      "900": { "$value": "#383C42", "$type": "color" },
      "950": { "$value": "#232529", "$type": "color" }
    },
    "brandInk": { "$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 #acb1ba · 9.75:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.15:1
AA fail · AA large fail · AAA fail
Aa
Black text · 9.75:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #acb1ba as text scores 2.15:1 on white and 9.75:1 on black.
Best tinted ink on it, if plain black or white feels flat: #3A3E46 at 4.98:1.

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
#6D7583 · 4.64:1
AA on white−23% L
#6D7583
The quick fox
#525762 · 7.25:1
AAA on white−35% L
#525762
The quick fox
#acb1ba · 9.75:1
AA on blackalready passes
#acb1ba
The quick fox
#acb1ba · 9.75:1
AAA on blackalready passes
#acb1ba

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #8D94A1 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
#acb1ba on white: 2.15:1
AA ✗ fail · AA-large · AAA
Aa
#acb1ba on black: 9.75:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #acb1ba as text on that neutral, and that neutral as text on #acb1ba.

NeutralRatioBoth directions
White2.15:1AaAa
Slate 502.06:1AaAa
Slate 1001.97:1AaAa
Slate 2001.75:1AaAa
Slate 3001.45:1AaAa
Slate 4001.19:1AaAa
Slate 5002.21:1AaAa
Slate 6003.52:1AaAa
Slate 7004.81:1AaAa
Slate 8006.79:1AaAa
Slate 9008.29:1AaAa
Black9.75:1AaAa
Colour vision deficiency
true color
protanopia · #AEB1BA
deuteranopia · #ADB0BA
tritanopia · #A9B3B4

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. #acb1ba 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.

#F7F7F8
#EFEFF1
#DBDDE1
#C2C5CC
#acb1ba
#848C99
#6F7786
#5D636F
#4A4F59
#383C42
#232529
Base = 400Lightest = 50 · #F7F7F8Darkest = 950 · #232529Text 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 0.004 262.4);
  --brand-100: oklch(0.94 0.006 262.4);
  --brand-200: oklch(0.88 0.008 262.4);
  --brand-300: oklch(0.80 0.011 262.4);
  --brand-400: oklch(0.72 0.013 262.4);
  --brand-500: oklch(0.64 0.014 262.4);
  --brand-600: oklch(0.56 0.014 262.4);
  --brand-700: oklch(0.48 0.013 262.4);
  --brand-800: oklch(0.40 0.012 262.4);
  --brand-900: oklch(0.32 0.010 262.4);
  --brand-950: oklch(0.24 0.008 262.4);
}

Colors that work with #acb1ba

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#F7F7F8
Tinted page background
Border#D2D5DA
Hairlines and dividers
Muted text#68707D
Captions on the surface
Accent#736359
Second voice, not a rival
Dark variant#3A3E46
Hover, pressed, headers
Light variant#F1F2F3
Selected rows, tints
Dark surface#191B1F
Dark-mode background
Hover#999FAA
One step down in lightness
Pressed#858C9A
Two steps down
Disabled#E9EBED
Chroma pulled out
Focus ring#B1BACA
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 #acb1ba

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

Works well for
  • Text and icons on dark surfaces
  • Borders, dividers and quiet backgrounds
  • Long-form reading surfaces
  • Card and section backgrounds
  • Brand accents, badges and data highlights
Use with care
  • Text of any size on white — fails WCAG AA
  • 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 #3A3E46
Safe as a 1px border on white
No — use #8D94A1

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 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
  • EnergyLow
  • Weight30/100
  • 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#BAB5AC
Analogous left#ACB8BA
Analogous right#AEACBA
Split-complement 1#BAAEAC
Split-complement 2#B8BAAC
Triadic 1#BAACB1
Triadic 2#B1BAAC
Tetradic#BAACB8
On the wheel
Base+30°−30°+120°+240°+180°219°

#acb1ba sits at 219°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red67.5%
Green69.4%
Blue72.9%
R · 0–255
172
0xac
G · 0–255
177
0xb1
B · 0–255
186
0xba

CMYK percentages

Cyan7.5%
Magenta4.8%
Yellow0.0%
Key (black)27.1%

Total ink coverage is 39%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#acb1ba text on a black background

contrast 9.75:1

Card sample

#acb1ba text on a white background

contrast 2.15:1

Card sample

#acb1ba on grey

1.97:1

#acb1ba on its own surface

2.01:1

#acb1ba on its dark surface

8.01:1

CSS3 live lab

Text font color

The quick brown fox

color: #acb1ba;
Background color
Panel with #acb1ba background
background-color: #acb1ba;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #acb1ba;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(172, 177, 186, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(172, 177, 186, 0.45);
Border & gradient
Gradient panel
border: 3px solid #acb1ba;
background: linear-gradient(135deg, #acb1ba, #B0ACBA);
Gradient text

Gradient headline

background: linear-gradient(90deg, #acb1ba, #B4ACBA);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #acb1ba;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #acb1ba;
caret-color: #acb1ba;
Left rule
Pull quote or callout
border-left: 4px solid #acb1ba;
Ring + tint
Selected chip
background: #F1F2F3;
box-shadow: inset 0 0 0 2px #acb1ba;
Conic badge
68%
background: conic-gradient(#acb1ba 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #acb1ba 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(172, 177, 186, 0.5)
rgb(172 177 186 / 50%)
#acb1ba80
hsl(219 9% 70% / 50%)
color-mix(in srgb, #acb1ba 50%, transparent)
Alpha8-digit hexFlat on white
10%#acb1ba1a#F7F7F8
20%#acb1ba33#EEEFF1
40%#acb1ba66#DEE0E3
60%#acb1ba99#CDD0D6
80%#acb1bacc#BDC1C8

Gradients from #acb1ba

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, #CDD0D6, #acb1ba 45%, #3A3E46);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #acb1ba, #A29BAC);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #acb1ba, #BAB5AC);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #DEE0E4 0%, #acb1ba 45%, #3A3E46 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%, #C8D1D1 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #BFBDC8 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #3A3E46 0%, transparent 65%), #acb1ba;

Monochromatic scale

Palettes built from #acb1ba

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.

#acb1ba 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

Usable as-is on a dark surface at 9.75:1.

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.

#acb1ba, answered

What color is #acb1ba?

#acb1ba is a light muted blue, closest to Dark Gray (ΔE2000 5.1). It sits at 219° on the hue wheel with 9% saturation and 70% lightness, which reads as cool.

What is the RGB value of #acb1ba?

rgb(172, 177, 186) — 172 red, 177 green and 186 blue out of 255, or 67.5% / 69.4% / 72.9% by channel.

What is #acb1ba in HSL and HSV?

hsl(219, 9%, 70%) and hsv(219, 8%, 73%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #acb1ba a light or a dark color?

It is a mid-tone. Relative luminance is 0.4376 and perceived brightness is 69%, so black text on it reaches 9.75:1.

Should I use black or white text on #acb1ba?

Black. It scores 9.75:1 against #acb1ba, versus 2.15:1 for white — AAA at any size.

Is #acb1ba accessible on a white background?

#acb1ba on white scores 2.15:1, which fails WCAG AA at every size. Darken it to #6D7583 to reach 4.5:1, or #525762 for 7:1.

What is the complementary color of #acb1ba?

#BAB5AC sits directly opposite on the wheel. Softer options are the split-complements #BAAEAC and #B8BAAC, which give the same contrast with far less vibration.

What colors go well with #acb1ba?

For interface work: #F7F7F8 as the surface, #D2D5DA for borders, #68707D for secondary text, #736359 as an accent and #3A3E46 for hover and pressed states. For a palette, the analogous pair #ACB8BA and #AEACBA stays calm, while #BAB5AC is the loudest partner.

What is #acb1ba in CMYK for printing?

cmyk(8%, 5%, 0%, 27%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #acb1ba warm or cool?

Cool — it scores 62 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #C2B7AE; nudged cooler, #A3AEB9.

Which Tailwind color is closest to #acb1ba?

The neutral family — its 500 step is #737373, ΔE2000 21.2 away. That is a visible difference, so define #acb1ba as a custom token rather than reaching for the built-in.

How do I use #acb1ba in Tailwind CSS?

Inline it as an arbitrary value with bg-[#acb1ba] or text-[#acb1ba], 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 #acb1ba with 50% opacity?

rgba(172, 177, 186, 0.5), or #acb1ba80 in eight-digit hex. Over white that composites to #D6D8DD; over black, #56595D.

Is #acb1ba a web-safe color?

No. The nearest web-safe colour is #9999CC, ΔE2000 15 away. The palette only matters for legacy displays and some email clients now.

What does the color #acb1ba 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 #acb1ba?

The safest is same-hue elevation: linear-gradient(135deg, #CDD0D6, #acb1ba 45%, #3A3E46). For more colour, a short hue run to #A29BAC keeps it rich without turning muddy.

Work with #acb1ba in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #acb1ba at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.