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cyan · cool

#5b686b

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

Token name suggestion: Slate Lagoon

RGB
91, 104, 107
HSL
191°, 8%, 39%
CMYK
15, 3, 0, 58
Luminance
0.1319

#5b686b is a dark muted cyan, 191° on the wheel and 60/100 on the cool side. Put white text on it (5.77:1). As text it scores 5.77:1 on white — safe at any size. Nearest name is Dim Gray, nearest Tailwind family is neutral.

hsl(191 8% 39%)rgb(91 104 107)Base step 700AA inkCool

At a glance

Every number on this page in one read: what #5b686b is made of, how bright it looks, and which way it leans.

Hex
#5b686b
Hue
191°
cyan
Saturation
8%
muted
Lightness
39%
dark
Brightness
42%
HSV value
Perceived
39%
weighted brightness
Luminance
0.1319
WCAG relative
Temperature
Cool
60/100 cool
Color family
Cyan
Tone
Muted
Best ink
White
5.77:1
Closest name
Dim Gray
ΔE2000 6.3
Chroma
5.4
LCH, 0–130ish
OKLCH L
0.507
perceptual lightness
Tailwind
neutral
500 · ΔE 8.1
Web-safe
#666666
nearest of 216
Where it sits
Hue191° of 360°
Saturation8%
Lightness39%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #5b686b.

Temperature
Warm ← → Cool60% 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%
Green75%
Blue8%

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

Every format

HEX#5b686b
HEX (8-digit)#5b686bff
RGBrgb(91, 104, 107)
RGBArgba(91, 104, 107, 1)
HSLhsl(191, 8%, 39%)
HSV / HSBhsv(191, 15%, 42%)
HWBhwb(191 36% 58%)
CMYKcmyk(15%, 3%, 0%, 58%)
LABlab(43.0 -4.2 -3.4)
LCHlch(43.0 5.4 218.5)
OKLCHoklch(0.507 0.017 213.2)
XYZ (D65)xyz(11.92, 13.19, 15.82)
Decimal5990507
Display P3color(display-p3 0.357 0.408 0.420)
Web-safe#666666

Copy-ready code

every platformclick to select
/* CSS */
color: #5b686b;
background-color: #5b686b;
/* CSS custom property */
--brand: #5b686b;
/* Tailwind (arbitrary) */
class="text-[#5b686b] bg-[#5b686b]"
/* SCSS */
$brand: #5b686b;
/* SwiftUI */
Color(red: 0.357, green: 0.408, blue: 0.420)
/* UIKit */
UIColor(red: 0.357, green: 0.408, blue: 0.420, alpha: 1)
/* Android XML */
<color name="brand">#5B686B</color>
/* Android Compose */
Color(0xFF5B686B)
/* Flutter */
Color(0xFF5B686B)
/* Python / OpenCV (BGR) */
(107, 104, 91)
/* Python / PIL (RGB) */
(91, 104, 107)
/* Java AWT */
new Color(91, 104, 107)
/* .NET */
Color.FromArgb(255, 91, 104, 107)
/* OpenGL / Unity (0–1) */
(0.3569f, 0.4078f, 0.4196f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{91,104,107}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #5b686b 85%, white);
border-color: color-mix(in oklab, #5b686b 40%, transparent);
/* theme-aware in one line */
color: light-dark(#3B4345, #DEE2E3);
/* relative colour syntax */
--hover: hsl(from #5b686b 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: #F7F8F8;
  --brand-100: #EFF0F1;
  --brand-200: #DBDFE0;
  --brand-300: #C2CACB;
  --brand-400: #A4AFB2;
  --brand-500: #869498;
  --brand-600: #708184;
  --brand-700: #5b686b;
  --brand-800: #4B5658;
  --brand-900: #394042;
  --brand-950: #232829;
  --brand: #5b686b;
  --brand-ink: #ffffff;
  --brand-surface: #F7F8F8;
  --brand-border: #D3D8DA;
  --brand-hover: #4B5558;
  --brand-pressed: #3A4244;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #1A1D1E;
    --brand-ink: #DEE2E3;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F7F8F8',
        100: '#EFF0F1',
        200: '#DBDFE0',
        300: '#C2CACB',
        400: '#A4AFB2',
        500: '#869498',
        600: '#708184',
        700: '#5b686b',
        800: '#4B5658',
        900: '#394042',
        950: '#232829',
        DEFAULT: '#5b686b',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F7F8F8,
  '100': #EFF0F1,
  '200': #DBDFE0,
  '300': #C2CACB,
  '400': #A4AFB2,
  '500': #869498,
  '600': #708184,
  '700': #5b686b,
  '800': #4B5658,
  '900': #394042,
  '950': #232829,
);
$brand-base: #5b686b;
$brand-ink: #ffffff;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F7F8F8", "$type": "color" },
      "100": { "$value": "#EFF0F1", "$type": "color" },
      "200": { "$value": "#DBDFE0", "$type": "color" },
      "300": { "$value": "#C2CACB", "$type": "color" },
      "400": { "$value": "#A4AFB2", "$type": "color" },
      "500": { "$value": "#869498", "$type": "color" },
      "600": { "$value": "#708184", "$type": "color" },
      "700": { "$value": "#5b686b", "$type": "color" },
      "800": { "$value": "#4B5658", "$type": "color" },
      "900": { "$value": "#394042", "$type": "color" },
      "950": { "$value": "#232829", "$type": "color" }
    },
    "brandInk": { "$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 #5b686b · 5.77:1
Use #ffffffAA at every size, AAA for large text only.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 5.77:1 · recommended
AA pass · AA large pass · AAA fail
Aa
Black text · 3.64:1
AA fail · AA large pass · AAA fail
Reading the other direction: #5b686b as text scores 5.77:1 on white and 3.64:1 on black.
Best tinted ink on it, if plain black or white feels flat: #F1F3F3 at 5.18:1.

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
#5b686b · 5.77:1
AA on whitealready passes
#5b686b
The quick fox
#4F5B5D · 7.03:1
AAA on white−5% L
#4F5B5D
The quick fox
#69787B · 4.57:1
AA on black+6% L
#69787B
The quick fox
#8B999C · 7.13:1
AAA on black+19% L
#8B999C

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #5B686B 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
#5b686b on white: 5.77:1
AA ✓ pass · AA-large · AAA
Aa
#5b686b on black: 3.64:1
AA ✗ fail · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #5b686b as text on that neutral, and that neutral as text on #5b686b.

NeutralRatioBoth directions
White5.77:1AaAa
Slate 505.52:1AaAa
Slate 1005.27:1AaAa
Slate 2004.68:1AaAa
Slate 3003.89:1AaAa
Slate 4002.25:1AaAa
Slate 5001.21:1AaAa
Slate 6001.31:1AaAa
Slate 7001.79:1AaAa
Slate 8002.53:1AaAa
Slate 9003.09:1AaAa
Black3.64:1AaAa
Colour vision deficiency
true color
protanopia · #66676B
deuteranopia · #63656B
tritanopia · #576969

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. #5b686b 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.

#F7F8F8
#EFF0F1
#DBDFE0
#C2CACB
#A4AFB2
#869498
#708184
#5b686b
#4B5658
#394042
#232829
Base = 700Lightest = 50 · #F7F8F8Darkest = 950 · #232829Text step on white = 700
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 0.004 213.2);
  --brand-100: oklch(0.94 0.007 213.2);
  --brand-200: oklch(0.88 0.010 213.2);
  --brand-300: oklch(0.80 0.013 213.2);
  --brand-400: oklch(0.72 0.015 213.2);
  --brand-500: oklch(0.64 0.017 213.2);
  --brand-600: oklch(0.56 0.017 213.2);
  --brand-700: oklch(0.48 0.016 213.2);
  --brand-800: oklch(0.40 0.014 213.2);
  --brand-900: oklch(0.32 0.012 213.2);
  --brand-950: oklch(0.24 0.009 213.2);
}

Colors that work with #5b686b

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#F7F8F8
Tinted page background
Border#D3D8DA
Hairlines and dividers
Muted text#69797C
Captions on the surface
Accent#6F5758
Second voice, not a rival
Dark variant#3B4345
Hover, pressed, headers
Light variant#F1F3F3
Selected rows, tints
Dark surface#1A1D1E
Dark-mode background
Hover#4B5558
One step down in lightness
Pressed#3A4244
Two steps down
Disabled#93A0A3
Chroma pulled out
Focus ring#597981
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 #5b686b

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
  • Black text placed on it
  • Thin strokes and 1px borders — they disappear on light UI
  • 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.

cleantechnicalfreshclinical

Cyan reads as water, air and infrastructure: cool, hygienic, engineered.

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

At high lightness it disappears into white surfaces and thin strokes vanish entirely.

Reads as
  • FormalityHigh
  • EnergyLow
  • Weight61/100
  • 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#6B5E5B
Analogous left#5B6B66
Analogous right#5B606B
Split-complement 1#6B5B60
Split-complement 2#6B665B
Triadic 1#6B5B68
Triadic 2#686B5B
Tetradic#665B6B
On the wheel
Base+30°−30°+120°+240°+180°191°

#5b686b sits at 191°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red35.7%
Green40.8%
Blue42.0%
R · 0–255
91
0x5b
G · 0–255
104
0x68
B · 0–255
107
0x6b

CMYK percentages

Cyan15.0%
Magenta2.8%
Yellow0.0%
Key (black)58.0%

Total ink coverage is 76%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#5b686b text on a black background

contrast 3.64:1

Card sample

#5b686b text on a white background

contrast 5.77:1

Card sample

#5b686b on grey

5.27:1

#5b686b on its own surface

5.43:1

#5b686b on its dark surface

2.94:1

CSS3 live lab

Text font color

The quick brown fox

color: #5b686b;
Background color
Panel with #5b686b background
background-color: #5b686b;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #5b686b;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(91, 104, 107, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(91, 104, 107, 0.45);
Border & gradient
Gradient panel
border: 3px solid #5b686b;
background: linear-gradient(135deg, #5b686b, #5B5D6B);
Gradient text

Gradient headline

background: linear-gradient(90deg, #5b686b, #5D5B6B);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #5b686b;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #5b686b;
caret-color: #5b686b;
Left rule
Pull quote or callout
border-left: 4px solid #5b686b;
Ring + tint
Selected chip
background: #F1F3F3;
box-shadow: inset 0 0 0 2px #5b686b;
Conic badge
68%
background: conic-gradient(#5b686b 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #5b686b 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(91, 104, 107, 0.5)
rgb(91 104 107 / 50%)
#5b686b80
hsl(191 8% 39% / 50%)
color-mix(in srgb, #5b686b 50%, transparent)
Alpha8-digit hexFlat on white
10%#5b686b1a#EFF0F0
20%#5b686b33#DEE1E1
40%#5b686b66#BDC3C4
60%#5b686b99#9DA4A6
80%#5b686bcc#7C8689

Gradients from #5b686b

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, #77888C, #5b686b 45%, #3B4345);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #5b686b, #4D4E5A);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #5b686b, #6B5E5B);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #88969A 0%, #5b686b 45%, #3B4345 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F7F8F8, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #72877F 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #696D7B 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #3B4345 0%, transparent 65%), #5b686b;

Monochromatic scale

Palettes built from #5b686b

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.

#5b686b in the real world

Where a color in this family tends to land, and the interface roles it is usually asked to play.

Industries
TechnologyTravelHealthcareMedia
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 3.64:1 — lift it to #69787B 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.

#5b686b, answered

What color is #5b686b?

#5b686b is a dark muted cyan, closest to Dim Gray (ΔE2000 6.3). It sits at 191° on the hue wheel with 8% saturation and 39% lightness, which reads as cool.

What is the RGB value of #5b686b?

rgb(91, 104, 107) — 91 red, 104 green and 107 blue out of 255, or 35.7% / 40.8% / 42% by channel.

What is #5b686b in HSL and HSV?

hsl(191, 8%, 39%) and hsv(191, 15%, 42%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #5b686b a light or a dark color?

It is a dark color. Relative luminance is 0.1319 and perceived brightness is 39%, so white text on it reaches 5.77:1.

Should I use black or white text on #5b686b?

White. It scores 5.77:1 against #5b686b, versus 3.64:1 for black — AA at any size.

Is #5b686b accessible on a white background?

#5b686b on white scores 5.77:1, which clears AA at every size but not AAA.

What is the complementary color of #5b686b?

#6B5E5B sits directly opposite on the wheel. Softer options are the split-complements #6B5B60 and #6B665B, which give the same contrast with far less vibration.

What colors go well with #5b686b?

For interface work: #F7F8F8 as the surface, #D3D8DA for borders, #69797C for secondary text, #6F5758 as an accent and #3B4345 for hover and pressed states. For a palette, the analogous pair #5B6B66 and #5B606B stays calm, while #6B5E5B is the loudest partner.

What is #5b686b in CMYK for printing?

cmyk(15%, 3%, 0%, 58%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #5b686b warm or cool?

Cool — it scores 60 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #776659; nudged cooler, #515D6B.

Which Tailwind color is closest to #5b686b?

The neutral family — its 500 step is #737373, ΔE2000 8.1 away. That is a visible difference, so define #5b686b as a custom token rather than reaching for the built-in.

How do I use #5b686b in Tailwind CSS?

Inline it as an arbitrary value with bg-[#5b686b] or text-[#5b686b], 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 #5b686b with 50% opacity?

rgba(91, 104, 107, 0.5), or #5b686b80 in eight-digit hex. Over white that composites to #ADB4B5; over black, #2E3436.

Is #5b686b a web-safe color?

No. The nearest web-safe colour is #666666, ΔE2000 6.2 away. The palette only matters for legacy displays and some email clients now.

What does the color #5b686b mean?

As a cyan, it reads clean, technical, fresh. Cyan reads as water, air and infrastructure: cool, hygienic, engineered. At this low chroma the association is faint; it behaves more like a neutral.

What gradient works with #5b686b?

The safest is same-hue elevation: linear-gradient(135deg, #77888C, #5b686b 45%, #3B4345). For more colour, a short hue run to #4D4E5A keeps it rich without turning muddy.

Work with #5b686b in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #5b686b at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.