#377BB7#377BB7

#377BB7 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.7% C 0.116 H 248.1°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#377BB7
RGB	rgb(55, 123, 183)
HSL	hsl(208, 54%, 47%)
HSV	hsv(208, 70%, 72%)
CMYK	cmyk(69.9%, 32.8%, 0%, 28.2%)
CIE-LAB	lab(49.97, -1.53, -37.87)
CIE-LCH	lch(49.97, 37.90, 267.68°)
OKLab	oklab(56.73% -0.0432 -0.1073)
OKLCH	oklch(56.73% 0.116 248.1)
XYZ	xyz(17.2025, 18.3952, 47.4346)
Luminance	0.1840 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BB7 #B77337

analogous

#37B7B3 #377BB7 #373BB7

triadic

#377BB7 #B7377B #7BB737

tetradic

#377BB7 #B337B7 #B77337 #3BB737

square

#377BB7 #B337B7 #B77337 #3BB737

split-complementary

#377BB7 #B7373B #B7B337

monochromatic

#1B3C59 #295B88 #377BB7 #5D99CE #8CB7DC

Accessibility & contrast

On white

4.49

#377BB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#377BB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BB7

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BB7	#FFFFFF	#000000	##000000
##377BB7	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#607EBA

Deuteranopia (green-blind)

#4E71B6

Tritanopia (blue-blind)

#008991

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377bb7;
/* rgb */ color: rgb(55, 123, 183);
/* oklch */ color: oklch(56.7% 0.116 248.1);

Tailwind

colors: {
  custom: {
    50: '#7da0cd',
    500: '#377bb7',
    950: '#000000',
  },
}

SCSS

$custom: #377bb7;
$custom-light: #7da0cd;
$custom-dark: #000000;

JSON

{
  "hex": "#377bb7",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 183
  },
  "hsl": {
    "h": 208.125,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.56726,
    "c": 0.11569,
    "h": 248.1
  },
  "luminance": 0.18397
}

Semantic roles & 50–950 ramp

primary

#377BB7

secondary

#C7A383

accent

#8F4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #377BB7

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

Preview Lab → · Contrast checker → · Palette generator →