#377CB9#377CB9

#377CB9 is a mid, moderate cyan. Relative luminance 0.187; OKLCH L 57.1% C 0.117 H 248.2°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#377CB9
RGB	rgb(55, 124, 185)
HSL	hsl(208, 54%, 47%)
HSV	hsv(208, 70%, 73%)
CMYK	cmyk(70.3%, 33%, 0%, 27.5%)
CIE-LAB	lab(50.37, -1.42, -38.40)
CIE-LCH	lch(50.37, 38.42, 267.88°)
OKLab	oklab(57.07% -0.0436 -0.1088)
OKLCH	oklch(57.07% 0.117 248.2)
XYZ	xyz(17.5369, 18.7284, 48.5803)
Luminance	0.1873 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CB9 #B97437

analogous

#37B9B5 #377CB9 #373BB9

triadic

#377CB9 #B9377C #7CB937

tetradic

#377CB9 #B537B9 #B97437 #3BB937

square

#377CB9 #B537B9 #B97437 #3BB937

split-complementary

#377CB9 #B9373B #B9B537

monochromatic

#1B3D5B #295C8A #377CB9 #5E9ACF #8DB8DD

Accessibility & contrast

On white

4.42

#377CB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#377CB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CB9

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CB9	#FFFFFF	#000000	##000000
##377CB9	1.00	4.42	4.75	4.75
#FFFFFF	4.42	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#617FBC

Deuteranopia (green-blind)

#4E72B8

Tritanopia (blue-blind)

#008B92

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377cb9;
/* rgb */ color: rgb(55, 124, 185);
/* oklch */ color: oklch(57.1% 0.117 248.2);

Tailwind

colors: {
  custom: {
    50: '#7da1ce',
    500: '#377cb9',
    950: '#000000',
  },
}

SCSS

$custom: #377cb9;
$custom-light: #7da1ce;
$custom-dark: #000000;

JSON

{
  "hex": "#377cb9",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 185
  },
  "hsl": {
    "h": 208.154,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.5707,
    "c": 0.11726,
    "h": 248.2
  },
  "luminance": 0.1873
}

Semantic roles & 50–950 ramp

primary

#377CB9

secondary

#C8A484

accent

#8F4ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #377CB9

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

Preview Lab → · Contrast checker → · Palette generator →