#377BD0#377BD0

#377BD0 is a mid, vivid cyan. Relative luminance 0.195; OKLCH L 58.2% C 0.148 H 255.5°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#377BD0
RGB	rgb(55, 123, 208)
HSL	hsl(213, 62%, 52%)
HSV	hsv(213, 74%, 82%)
CMYK	cmyk(73.6%, 40.9%, 0%, 18.4%)
CIE-LAB	lab(51.30, 7.50, -50.07)
CIE-LCH	lch(51.30, 50.63, 278.52°)
OKLab	oklab(58.2% -0.0369 -0.143)
OKLCH	oklch(58.2% 0.148 255.5)
XYZ	xyz(20.0395, 19.5300, 62.3758)
Luminance	0.1953 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BD0 #D08C37

analogous

#37C8D0 #377BD0 #4037D0

triadic

#377BD0 #D0377B #7BD037

tetradic

#377BD0 #D037C8 #D08C37 #37D040

square

#377BD0 #D037C8 #D08C37 #37D040

split-complementary

#377BD0 #D04037 #C8D037

monochromatic

#1B4172 #265EA3 #377BD0 #699CDC #9ABCE7

Accessibility & contrast

On white

4.28

#377BD0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#377BD0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BD0

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BD0	#FFFFFF	#000000	##000000
##377BD0	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5282D3

Deuteranopia (green-blind)

#3974CE

Tritanopia (blue-blind)

#008F9B

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #377bd0;
/* rgb */ color: rgb(55, 123, 208);
/* oklch */ color: oklch(58.2% 0.148 255.5);

Tailwind

colors: {
  custom: {
    50: '#81a0df',
    500: '#377bd0',
    950: '#000000',
  },
}

SCSS

$custom: #377bd0;
$custom-light: #81a0df;
$custom-dark: #000000;

JSON

{
  "hex": "#377bd0",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 208
  },
  "hsl": {
    "h": 213.333,
    "s": 61.943,
    "l": 51.569
  },
  "oklch": {
    "l": 0.58199,
    "c": 0.1477,
    "h": 255.5
  },
  "luminance": 0.19532
}

Semantic roles & 50–950 ramp

primary

#377BD0

secondary

#D3B590

accent

#9D43E5

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #377BD0

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

Preview Lab → · Contrast checker → · Palette generator →