#377CB8#377CB8

#377CB8 is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 57.0% C 0.116 H 247.8°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#377CB8
RGB	rgb(55, 124, 184)
HSL	hsl(208, 54%, 47%)
HSV	hsv(208, 70%, 72%)
CMYK	cmyk(70.1%, 32.6%, 0%, 27.8%)
CIE-LAB	lab(50.32, -1.78, -37.90)
CIE-LCH	lch(50.32, 37.94, 267.32°)
OKLab	oklab(57.02% -0.0439 -0.1074)
OKLCH	oklch(57.02% 0.116 247.8)
XYZ	xyz(17.4317, 18.6863, 48.0262)
Luminance	0.1869 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CB8 #B87337

analogous

#37B8B4 #377CB8 #373CB8

triadic

#377CB8 #B8377C #7CB837

tetradic

#377CB8 #B437B8 #B87337 #3CB837

square

#377CB8 #B437B8 #B87337 #3CB837

split-complementary

#377CB8 #B8373C #B8B437

monochromatic

#1B3C5A #295C89 #377CB8 #5D9ACF #8DB7DD

Accessibility & contrast

On white

4.43

#377CB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#377CB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CB8

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CB8	#FFFFFF	#000000	##000000
##377CB8	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#617EBB

Deuteranopia (green-blind)

#4F72B7

Tritanopia (blue-blind)

#008A91

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377cb8;
/* rgb */ color: rgb(55, 124, 184);
/* oklch */ color: oklch(57.0% 0.116 247.8);

Tailwind

colors: {
  custom: {
    50: '#7da1cd',
    500: '#377cb8',
    950: '#000000',
  },
}

SCSS

$custom: #377cb8;
$custom-light: #7da1cd;
$custom-dark: #000000;

JSON

{
  "hex": "#377cb8",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 184
  },
  "hsl": {
    "h": 207.907,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.57015,
    "c": 0.11602,
    "h": 247.8
  },
  "luminance": 0.18688
}

Semantic roles & 50–950 ramp

primary

#377CB8

secondary

#C7A384

accent

#8F4ADD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #377CB8

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

Preview Lab → · Contrast checker → · Palette generator →