#4091CB#4091CB

#4091CB is a light, moderate cyan. Relative luminance 0.257; OKLCH L 63.2% C 0.118 H 243.0°. Best body text is #000000 at 6.13:1 contrast (WCAG AA passes).

Color values

HEX#4091CB
RGBrgb(64, 145, 203)
HSLhsl(205, 57%, 52%)
HSVhsv(205, 68%, 80%)
CMYKcmyk(68.5%, 28.6%, 0%, 20.4%)
CIE-LABlab(57.70, -6.04, -37.10)
CIE-LCHlch(57.70, 37.59, 260.75°)
OKLaboklab(63.22% -0.0534 -0.1047)
OKLCHoklch(63.22% 0.118 243)
XYZxyz(23.0151, 25.6501, 60.2264)
Luminance0.2565 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#4091CB #CB7A40
analogous
#40CBC0 #4091CB #404BCB
triadic
#4091CB #CB4091 #91CB40
tetradic
#4091CB #C040CB #CB7A40 #4BCB40
square
#4091CB #C040CB #CB7A40 #4BCB40
split-complementary
#4091CB #CB404B #CBC040
monochromatic
#1F4F72 #2C71A2 #4091CB #70ADD8 #A0C8E5

Accessibility & contrast

On white

3.43
#4091CB on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.13
#4091CB on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4091CB
6.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##4091CB#FFFFFF#000000##000000
##4091CB1.003.436.136.13
#FFFFFF3.431.0021.0021.00
#0000006.1321.001.001.00
##0000006.1321.001.001.00

Color blindness preview

Protanopia (red-blind)
#7792CE
Deuteranopia (green-blind)
#6485CA
Tritanopia (blue-blind)
#009FA5
Achromatopsia (no color)
#8B8B8B

Design tokens & code

CSS
--color: #4091cb;
/* rgb */ color: rgb(64, 145, 203);
/* oklch */ color: oklch(63.2% 0.118 243.0);
Tailwind
colors: {
  custom: {
    50: '#84b1db',
    500: '#4091cb',
    950: '#000000',
  },
}
SCSS
$custom: #4091cb;
$custom-light: #84b1db;
$custom-dark: #000000;
JSON
{
  "hex": "#4091cb",
  "rgb": {
    "r": 64,
    "g": 145,
    "b": 203
  },
  "hsl": {
    "h": 205.036,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.63219,
    "c": 0.11758,
    "h": 243
  },
  "luminance": 0.25653
}

Semantic roles & 50–950 ramp

primary
#4091CB
secondary
#D2AE95
accent
#8747E0
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83

Preview Lab

Preview with #4091CB

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →

#4091CB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva