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cyan · cool

#91afb5

a balanced, soft cyan · cool · closest name: Cadet Blue

Token name suggestion: Studio Teal

RGB
145, 175, 181
HSL
190°, 20%, 64%
CMYK
20, 3, 0, 29
Luminance
0.4002

#91afb5 is a balanced soft cyan, 190° on the wheel and 73/100 on the cool side. Put black text on it (9.00:1). As text it scores 2.33:1 on white — use #587C83 instead. Nearest name is Cadet Blue, nearest Tailwind family is cyan.

hsl(190 20% 64%)rgb(145 175 181)Base step 400AAA inkCool

At a glance

Every number on this page in one read: what #91afb5 is made of, how bright it looks, and which way it leans.

Hex
#91afb5
Hue
190°
cyan
Saturation
20%
soft
Lightness
64%
balanced
Brightness
71%
HSV value
Perceived
66%
weighted brightness
Luminance
0.4002
WCAG relative
Temperature
Cool
73/100 cool
Color family
Cyan
Tone
Soft
Best ink
Black
9.00:1
Closest name
Cadet Blue
ΔE2000 10.6
Chroma
11.0
LCH, 0–130ish
OKLCH L
0.734
perceptual lightness
Tailwind
cyan
500 · ΔE 13.3
Web-safe
#9999CC
nearest of 216
Where it sits
Hue190° of 360°
Saturation20%
Lightness64%
Saturation × lightness field

Left edge is grey, right edge is full chroma; top is white, bottom is black. The dot is #91afb5.

Temperature
Warm ← → Cool73% 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
Red15%
Green77%
Blue8%

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

Every format

HEX#91afb5
HEX (8-digit)#91afb5ff
RGBrgb(145, 175, 181)
RGBArgba(145, 175, 181, 1)
HSLhsl(190, 20%, 64%)
HSV / HSBhsv(190, 20%, 71%)
HWBhwb(190 57% 29%)
CMYKcmyk(20%, 3%, 0%, 29%)
LABlab(69.5 -8.9 -6.5)
LCHlch(69.5 11.0 216.1)
OKLCHoklch(0.734 0.034 211.1)
XYZ (D65)xyz(35.35, 40.01, 49.57)
Decimal9547701
Display P3color(display-p3 0.569 0.686 0.710)
Web-safe#9999CC

Copy-ready code

every platformclick to select
/* CSS */
color: #91afb5;
background-color: #91afb5;
/* CSS custom property */
--brand: #91afb5;
/* Tailwind (arbitrary) */
class="text-[#91afb5] bg-[#91afb5]"
/* SCSS */
$brand: #91afb5;
/* SwiftUI */
Color(red: 0.569, green: 0.686, blue: 0.710)
/* UIKit */
UIColor(red: 0.569, green: 0.686, blue: 0.710, alpha: 1)
/* Android XML */
<color name="brand">#91AFB5</color>
/* Android Compose */
Color(0xFF91AFB5)
/* Flutter */
Color(0xFF91AFB5)
/* Python / OpenCV (BGR) */
(181, 175, 145)
/* Python / PIL (RGB) */
(145, 175, 181)
/* Java AWT */
new Color(145, 175, 181)
/* .NET */
Color.FromArgb(255, 145, 175, 181)
/* OpenGL / Unity (0–1) */
(0.5686f, 0.6863f, 0.7098f, 1f)
/* LaTeX */
\definecolor{brand}{RGB}{145,175,181}
modern cssclick to select
/* mix without leaving CSS */
background: color-mix(in oklab, #91afb5 85%, white);
border-color: color-mix(in oklab, #91afb5 40%, transparent);
/* theme-aware in one line */
color: light-dark(#33484C, #DAE4E6);
/* relative colour syntax */
--hover: hsl(from #91afb5 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: #F6F8F9;
  --brand-100: #EDF1F2;
  --brand-200: #D8E2E4;
  --brand-300: #BCCED2;
  --brand-400: #91afb5;
  --brand-500: #799DA5;
  --brand-600: #628A92;
  --brand-700: #52737A;
  --brand-800: #425C62;
  --brand-900: #324548;
  --brand-950: #1F2B2D;
  --brand: #91afb5;
  --brand-ink: #000000;
  --brand-surface: #F6F8F9;
  --brand-border: #CEDCDE;
  --brand-hover: #7C9FA7;
  --brand-pressed: #669098;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand-surface: #172022;
    --brand-ink: #DAE4E6;
  }
}
tailwind.config.jsclick to select
theme: {
  extend: {
    colors: {
      brand: {
        50: '#F6F8F9',
        100: '#EDF1F2',
        200: '#D8E2E4',
        300: '#BCCED2',
        400: '#91afb5',
        500: '#799DA5',
        600: '#628A92',
        700: '#52737A',
        800: '#425C62',
        900: '#324548',
        950: '#1F2B2D',
        DEFAULT: '#91afb5',
      },
    },
  },
}
scss mapclick to select
$brand: (
  '50': #F6F8F9,
  '100': #EDF1F2,
  '200': #D8E2E4,
  '300': #BCCED2,
  '400': #91afb5,
  '500': #799DA5,
  '600': #628A92,
  '700': #52737A,
  '800': #425C62,
  '900': #324548,
  '950': #1F2B2D,
);
$brand-base: #91afb5;
$brand-ink: #000000;

@function brand($step) { @return map-get($brand, $step); }
w3c design tokens (json)click to select
{
  "color": {
    "brand": {
      "50": { "$value": "#F6F8F9", "$type": "color" },
      "100": { "$value": "#EDF1F2", "$type": "color" },
      "200": { "$value": "#D8E2E4", "$type": "color" },
      "300": { "$value": "#BCCED2", "$type": "color" },
      "400": { "$value": "#91afb5", "$type": "color" },
      "500": { "$value": "#799DA5", "$type": "color" },
      "600": { "$value": "#628A92", "$type": "color" },
      "700": { "$value": "#52737A", "$type": "color" },
      "800": { "$value": "#425C62", "$type": "color" },
      "900": { "$value": "#324548", "$type": "color" },
      "950": { "$value": "#1F2B2D", "$type": "color" }
    },
    "brandInk": { "$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 #91afb5 · 9.00:1
Use #000000AAA at every size.
Aa
12px
Aa
16px
Aa
24px
Aa
White text · 2.33:1
AA fail · AA large fail · AAA fail
Aa
Black text · 9.00:1 · recommended
AA pass · AA large pass · AAA pass
Reading the other direction: #91afb5 as text scores 2.33:1 on white and 9.00:1 on black.
Best tinted ink on it, if plain black or white feels flat: #33484C at 4.14:1.

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
#587C83 · 4.54:1
AA on white−21% L
#587C83
The quick fox
#415C61 · 7.17:1
AAA on white−32% L
#415C61
The quick fox
#91afb5 · 9.00:1
AA on blackalready passes
#91afb5
The quick fox
#91afb5 · 9.00:1
AAA on blackalready passes
#91afb5

Large text — 24px regular or 18.66px bold and above — only needs 3:1, so #759BA3 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
#91afb5 on white: 2.33:1
AA ✗ fail · AA-large · AAA
Aa
#91afb5 on black: 9.00:1
AA ✓ pass · AA-large · AAA
Against the neutral ladder

Contrast is symmetric, so each row covers both directions: #91afb5 as text on that neutral, and that neutral as text on #91afb5.

NeutralRatioBoth directions
White2.33:1AaAa
Slate 502.23:1AaAa
Slate 1002.13:1AaAa
Slate 2001.89:1AaAa
Slate 3001.57:1AaAa
Slate 4001.10:1AaAa
Slate 5002.04:1AaAa
Slate 6003.25:1AaAa
Slate 7004.44:1AaAa
Slate 8006.27:1AaAa
Slate 9007.65:1AaAa
Black9.00:1AaAa
Colour vision deficiency
true color
protanopia · #AAADB5
deuteranopia · #A3A8B5
tritanopia · #86B2B1

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. #91afb5 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.

#F6F8F9
#EDF1F2
#D8E2E4
#BCCED2
#91afb5
#799DA5
#628A92
#52737A
#425C62
#324548
#1F2B2D
Base = 400Lightest = 50 · #F6F8F9Darkest = 950 · #1F2B2DText 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 0.009 211.1);
  --brand-100: oklch(0.94 0.014 211.1);
  --brand-200: oklch(0.88 0.020 211.1);
  --brand-300: oklch(0.80 0.027 211.1);
  --brand-400: oklch(0.72 0.031 211.1);
  --brand-500: oklch(0.64 0.034 211.1);
  --brand-600: oklch(0.56 0.034 211.1);
  --brand-700: oklch(0.48 0.032 211.1);
  --brand-800: oklch(0.40 0.029 211.1);
  --brand-900: oklch(0.32 0.024 211.1);
  --brand-950: oklch(0.24 0.019 211.1);
}

Colors that work with #91afb5

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#F6F8F9
Tinted page background
Border#CEDCDE
Hairlines and dividers
Muted text#5C8289
Captions on the surface
Accent#7E4E52
Second voice, not a rival
Dark variant#33484C
Hover, pressed, headers
Light variant#F0F4F5
Selected rows, tints
Dark surface#172022
Dark-mode background
Hover#7C9FA7
One step down in lightness
Pressed#669098
Two steps down
Disabled#D4E0E2
Chroma pulled out
Focus ring#95BDC5
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 #91afb5

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
  • Thin strokes and 1px borders — they disappear on light UI
  • 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 #33484C
Safe as a 1px border on white
No — use #759BA3

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.

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

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

Reads as
  • FormalityMedium
  • EnergyMedium
  • Weight36/100
  • 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#B59791
Analogous left#91B5A9
Analogous right#919DB5
Split-complement 1#B5919D
Split-complement 2#B5A991
Triadic 1#B591AF
Triadic 2#AFB591
Tetradic#A991B5
On the wheel
Base+30°−30°+120°+240°+180°190°

#91afb5 sits at 190°. Every dot is a harmony position and links to its own page in the table alongside.

RGB percentages

Red56.9%
Green68.6%
Blue71.0%
R · 0–255
145
0x91
G · 0–255
175
0xaf
B · 0–255
181
0xb5

CMYK percentages

Cyan19.9%
Magenta3.3%
Yellow0.0%
Key (black)29.0%

Total ink coverage is 52%. Most commercial presses cap around 300% — above that, sheets stop drying properly.

Color previews

#91afb5 text on a black background

contrast 9.00:1

Card sample

#91afb5 text on a white background

contrast 2.33:1

Card sample

#91afb5 on grey

2.13:1

#91afb5 on its own surface

2.19:1

#91afb5 on its dark surface

7.11:1

CSS3 live lab

Text font color

The quick brown fox

color: #91afb5;
Background color
Panel with #91afb5 background
background-color: #91afb5;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #91afb5;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(145, 175, 181, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(145, 175, 181, 0.45);
Border & gradient
Gradient panel
border: 3px solid #91afb5;
background: linear-gradient(135deg, #91afb5, #9197B5);
Gradient text

Gradient headline

background: linear-gradient(90deg, #91afb5, #9491B5);
-webkit-background-clip: text;
color: transparent;
Focus ring
Focused control
outline: 2px solid #91afb5;
outline-offset: 3px;
Underline & caret

Marked up text

text-decoration-color: #91afb5;
caret-color: #91afb5;
Left rule
Pull quote or callout
border-left: 4px solid #91afb5;
Ring + tint
Selected chip
background: #F0F4F5;
box-shadow: inset 0 0 0 2px #91afb5;
Conic badge
68%
background: conic-gradient(#91afb5 68%, #e2e8f0 0);

Transparency

What each alpha value actually composites to. The top row is #91afb5 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(145, 175, 181, 0.5)
rgb(145 175 181 / 50%)
#91afb580
hsl(190 20% 64% / 50%)
color-mix(in srgb, #91afb5 50%, transparent)
Alpha8-digit hexFlat on white
10%#91afb51a#F4F7F8
20%#91afb533#E9EFF0
40%#91afb566#D3DFE1
60%#91afb599#BDCFD3
80%#91afb5cc#A7BFC4

Gradients from #91afb5

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, #B5CACE, #91afb5 45%, #33484C);
Duotone
A short hue run reads richer than a flat fill
background: linear-gradient(120deg, #91afb5, #7F82A9);
Complement sweep
Loud — keep it behind large type only
background: linear-gradient(90deg, #91afb5, #B59791);
Spotlight
Hero panels and app headers
background: radial-gradient(120% 120% at 20% 0%, #C8D7DA 0%, #91afb5 45%, #33484C 100%);
Soft wash
Section backgrounds that stay readable
background: linear-gradient(180deg, #F6F8F9, #ffffff);
Mesh
Ambient background, no image weight
background: radial-gradient(60% 60% at 15% 20%, #AFC9BF 0%, transparent 60%), radial-gradient(55% 55% at 85% 15%, #A3ABC1 0%, transparent 60%), radial-gradient(70% 70% at 50% 95%, #33484C 0%, transparent 65%), #91afb5;

Monochromatic scale

Palettes built from #91afb5

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.

#91afb5 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
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 9.00:1.

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.

#91afb5, answered

What color is #91afb5?

#91afb5 is a balanced soft cyan, closest to Cadet Blue (ΔE2000 10.6). It sits at 190° on the hue wheel with 20% saturation and 64% lightness, which reads as cool.

What is the RGB value of #91afb5?

rgb(145, 175, 181) — 145 red, 175 green and 181 blue out of 255, or 56.9% / 68.6% / 71% by channel.

What is #91afb5 in HSL and HSV?

hsl(190, 20%, 64%) and hsv(190, 20%, 71%). HSL is what CSS takes; HSV is what your design tool's picker shows, which is why the saturation numbers rarely match.

Is #91afb5 a light or a dark color?

It is a mid-tone. Relative luminance is 0.4002 and perceived brightness is 66%, so black text on it reaches 9.00:1.

Should I use black or white text on #91afb5?

Black. It scores 9.00:1 against #91afb5, versus 2.33:1 for white — AAA at any size.

Is #91afb5 accessible on a white background?

#91afb5 on white scores 2.33:1, which fails WCAG AA at every size. Darken it to #587C83 to reach 4.5:1, or #415C61 for 7:1.

What is the complementary color of #91afb5?

#B59791 sits directly opposite on the wheel. Softer options are the split-complements #B5919D and #B5A991, which give the same contrast with far less vibration.

What colors go well with #91afb5?

For interface work: #F6F8F9 as the surface, #CEDCDE for borders, #5C8289 for secondary text, #7E4E52 as an accent and #33484C for hover and pressed states. For a palette, the analogous pair #91B5A9 and #919DB5 stays calm, while #B59791 is the loudest partner.

What is #91afb5 in CMYK for printing?

cmyk(20%, 3%, 0%, 29%). This is a screen-to-ink approximation — ask your printer for a proof before committing to a run.

Is #91afb5 warm or cool?

Cool — it scores 73 on a scale where 0 is the warmest orange and 100 the coolest azure. Nudged warmer it becomes #91B5AE; nudged cooler, #8FA4B7.

Which Tailwind color is closest to #91afb5?

The cyan family — its 500 step is #06b6d4, ΔE2000 13.3 away. That is a visible difference, so define #91afb5 as a custom token rather than reaching for the built-in.

How do I use #91afb5 in Tailwind CSS?

Inline it as an arbitrary value with bg-[#91afb5] or text-[#91afb5], 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 #91afb5 with 50% opacity?

rgba(145, 175, 181, 0.5), or #91afb580 in eight-digit hex. Over white that composites to #C8D7DA; over black, #49585B.

Is #91afb5 a web-safe color?

No. The nearest web-safe colour is #9999CC, ΔE2000 20 away. The palette only matters for legacy displays and some email clients now.

What does the color #91afb5 mean?

As a cyan, it reads clean, technical, fresh. Cyan reads as water, air and infrastructure: cool, hygienic, engineered. At this moderate chroma the association is present but not shouted.

What gradient works with #91afb5?

The safest is same-hue elevation: linear-gradient(135deg, #B5CACE, #91afb5 45%, #33484C). For more colour, a short hue run to #7F82A9 keeps it rich without turning muddy.

Work with #91afb5 in the Color Lab

Every tool opens with this colour already loaded.

Every value on this page is computed from #91afb5 at request time — conversions, contrast ratios and ΔE distances are calculated, never looked up.