#377CBB#377CBB

#377CBB is a mid, moderate cyan. Relative luminance 0.188; OKLCH L 57.2% C 0.120 H 248.9°. Best body text is #000000 at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#377CBB
RGB	rgb(55, 124, 187)
HSL	hsl(209, 55%, 47%)
HSV	hsv(209, 71%, 73%)
CMYK	cmyk(70.6%, 33.7%, 0%, 26.7%)
CIE-LAB	lab(50.47, -0.71, -39.39)
CIE-LCH	lch(50.47, 39.40, 268.97°)
OKLab	oklab(57.18% -0.0431 -0.1117)
OKLCH	oklch(57.18% 0.12 248.9)
XYZ	xyz(17.7495, 18.8135, 49.7000)
Luminance	0.1882 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CBB #BB7637

analogous

#37BBB8 #377CBB #373ABB

triadic

#377CBB #BB377C #7CBB37

tetradic

#377CBB #B837BB #BB7637 #3ABB37

square

#377CBB #B837BB #BB7637 #3ABB37

split-complementary

#377CBB #BB373A #BBB837

monochromatic

#1B3D5C #295D8C #377CBB #5F9AD0 #8EB8DE

Accessibility & contrast

On white

4.41

#377CBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.76

#377CBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CBB

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CBB	#FFFFFF	#000000	##000000
##377CBB	1.00	4.41	4.76	4.76
#FFFFFF	4.41	1.00	21.00	21.00
#000000	4.76	21.00	1.00	1.00
##000000	4.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#607FBE

Deuteranopia (green-blind)

#4D72BA

Tritanopia (blue-blind)

#008B93

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377cbb;
/* rgb */ color: rgb(55, 124, 187);
/* oklch */ color: oklch(57.2% 0.120 248.9);

Tailwind

colors: {
  custom: {
    50: '#7da1d0',
    500: '#377cbb',
    950: '#000000',
  },
}

SCSS

$custom: #377cbb;
$custom-light: #7da1d0;
$custom-dark: #000000;

JSON

{
  "hex": "#377cbb",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 187
  },
  "hsl": {
    "h": 208.636,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57182,
    "c": 0.11975,
    "h": 248.9
  },
  "luminance": 0.18815
}

Semantic roles & 50–950 ramp

primary

#377CBB

secondary

#C9A585

accent

#914ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #377CBB

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

Preview Lab → · Contrast checker → · Palette generator →