#377BCB#377BCB

#377BCB is a mid, vivid cyan. Relative luminance 0.193; OKLCH L 57.9% C 0.141 H 254.4°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#377BCB
RGB	rgb(55, 123, 203)
HSL	hsl(212, 59%, 51%)
HSV	hsv(212, 73%, 80%)
CMYK	cmyk(72.9%, 39.4%, 0%, 20.4%)
CIE-LAB	lab(51.02, 5.67, -47.67)
CIE-LCH	lch(51.02, 48.01, 276.79°)
OKLab	oklab(57.89% -0.038 -0.136)
OKLCH	oklch(57.89% 0.141 254.4)
XYZ	xyz(19.4340, 19.2878, 59.1870)
Luminance	0.1929 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BCB #CB8737

analogous

#37C5CB #377BCB #3D37CB

triadic

#377BCB #CB377B #7BCB37

tetradic

#377BCB #CB37C5 #CB8737 #37CB3D

square

#377BCB #CB37C5 #CB8737 #37CB3D

split-complementary

#377BCB #CB3D37 #C5CB37

monochromatic

#1C416C #295E9C #377BCB #689BD8 #98BBE4

Accessibility & contrast

On white

4.32

#377BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#377BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BCB

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BCB	#FFFFFF	#000000	##000000
##377BCB	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5681CE

Deuteranopia (green-blind)

#3E73C9

Tritanopia (blue-blind)

#008E99

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377bcb;
/* rgb */ color: rgb(55, 123, 203);
/* oklch */ color: oklch(57.9% 0.141 254.4);

Tailwind

colors: {
  custom: {
    50: '#80a0db',
    500: '#377bcb',
    950: '#000000',
  },
}

SCSS

$custom: #377bcb;
$custom-light: #80a0db;
$custom-dark: #000000;

JSON

{
  "hex": "#377bcb",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 203
  },
  "hsl": {
    "h": 212.432,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.57891,
    "c": 0.14119,
    "h": 254.4
  },
  "luminance": 0.1929
}

Semantic roles & 50–950 ramp

primary

#377BCB

secondary

#D0B28E

accent

#9A46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #377BCB

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

Preview Lab → · Contrast checker → · Palette generator →