#377BB8#377BB8

#377BB8 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.8% C 0.117 H 248.5°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#377BB8
RGB	rgb(55, 123, 184)
HSL	hsl(208, 54%, 47%)
HSV	hsv(208, 70%, 72%)
CMYK	cmyk(70.1%, 33.2%, 0%, 27.8%)
CIE-LAB	lab(50.02, -1.18, -38.37)
CIE-LCH	lch(50.02, 38.39, 268.24°)
OKLab	oklab(56.78% -0.0429 -0.1088)
OKLCH	oklch(56.78% 0.117 248.5)
XYZ	xyz(17.3070, 18.4370, 47.9847)
Luminance	0.1844 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BB8 #B87437

analogous

#37B8B5 #377BB8 #373BB8

triadic

#377BB8 #B8377B #7BB837

tetradic

#377BB8 #B537B8 #B87437 #3BB837

square

#377BB8 #B537B8 #B87437 #3BB837

split-complementary

#377BB8 #B8373B #B8B537

monochromatic

#1B3C5A #295C89 #377BB8 #5D99CF #8DB7DD

Accessibility & contrast

On white

4.48

#377BB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#377BB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BB8

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BB8	#FFFFFF	#000000	##000000
##377BB8	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#607EBB

Deuteranopia (green-blind)

#4E71B7

Tritanopia (blue-blind)

#008991

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377bb8;
/* rgb */ color: rgb(55, 123, 184);
/* oklch */ color: oklch(56.8% 0.117 248.5);

Tailwind

colors: {
  custom: {
    50: '#7da0cd',
    500: '#377bb8',
    950: '#000000',
  },
}

SCSS

$custom: #377bb8;
$custom-light: #7da0cd;
$custom-dark: #000000;

JSON

{
  "hex": "#377bb8",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 184
  },
  "hsl": {
    "h": 208.372,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.56782,
    "c": 0.11693,
    "h": 248.5
  },
  "luminance": 0.18439
}

Semantic roles & 50–950 ramp

primary

#377BB8

secondary

#C7A484

accent

#904ADD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #377BB8

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

Preview Lab → · Contrast checker → · Palette generator →