#377EBB#377EBB

#377EBB is a mid, moderate cyan. Relative luminance 0.193; OKLCH L 57.6% C 0.118 H 247.5°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#377EBB
RGB	rgb(55, 126, 187)
HSL	hsl(208, 55%, 47%)
HSV	hsv(208, 71%, 73%)
CMYK	cmyk(70.6%, 32.6%, 0%, 26.7%)
CIE-LAB	lab(51.06, -1.90, -38.46)
CIE-LCH	lch(51.06, 38.51, 267.17°)
OKLab	oklab(57.65% -0.045 -0.109)
OKLCH	oklch(57.65% 0.118 247.5)
XYZ	xyz(18.0027, 19.3198, 49.7844)
Luminance	0.1932 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377EBB #BB7437

analogous

#37BBB6 #377EBB #373CBB

triadic

#377EBB #BB377E #7EBB37

tetradic

#377EBB #B637BB #BB7437 #3CBB37

square

#377EBB #B637BB #BB7437 #3CBB37

split-complementary

#377EBB #BB373C #BBB637

monochromatic

#1B3E5C #295E8C #377EBB #5F9CD0 #8EB9DE

Accessibility & contrast

On white

4.32

#377EBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#377EBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377EBB

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377EBB	#FFFFFF	#000000	##000000
##377EBB	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)

#6381BE

Deuteranopia (green-blind)

#5074BA

Tritanopia (blue-blind)

#008D94

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #377ebb;
/* rgb */ color: rgb(55, 126, 187);
/* oklch */ color: oklch(57.6% 0.118 247.5);

Tailwind

colors: {
  custom: {
    50: '#7da3d0',
    500: '#377ebb',
    950: '#000000',
  },
}

SCSS

$custom: #377ebb;
$custom-light: #7da3d0;
$custom-dark: #000000;

JSON

{
  "hex": "#377ebb",
  "rgb": {
    "r": 55,
    "g": 126,
    "b": 187
  },
  "hsl": {
    "h": 207.727,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57647,
    "c": 0.11793,
    "h": 247.5
  },
  "luminance": 0.19322
}

Semantic roles & 50–950 ramp

primary

#377EBB

secondary

#C9A485

accent

#8E4ADE

background

#F8FAFC

surface

#EFF3F9

border

#CACDD2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #377EBB

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

Preview Lab → · Contrast checker → · Palette generator →