#377BBC#377BBC

#377BBC is a mid, vivid cyan. Relative luminance 0.186; OKLCH L 57.0% C 0.122 H 250.0°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#377BBC
RGB	rgb(55, 123, 188)
HSL	hsl(209, 55%, 48%)
HSV	hsv(209, 71%, 74%)
CMYK	cmyk(70.7%, 34.6%, 0%, 26.3%)
CIE-LAB	lab(50.22, 0.25, -40.35)
CIE-LCH	lch(50.22, 40.35, 270.36°)
OKLab	oklab(57.01% -0.0418 -0.1145)
OKLCH	oklch(57.01% 0.122 250)
XYZ	xyz(17.7322, 18.6071, 50.2242)
Luminance	0.1861 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BBC #BC7837

analogous

#37BCBA #377BBC #3739BC

triadic

#377BBC #BC377B #7BBC37

tetradic

#377BBC #BA37BC #BC7837 #39BC37

square

#377BBC #BA37BC #BC7837 #39BC37

split-complementary

#377BBC #BC3739 #BCBA37

monochromatic

#1B3D5D #295C8D #377BBC #6099D0 #8FB8DE

Accessibility & contrast

On white

4.45

#377BBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#377BBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BBC

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BBC	#FFFFFF	#000000	##000000
##377BBC	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E7EBF

Deuteranopia (green-blind)

#4B72BB

Tritanopia (blue-blind)

#008A93

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #377bbc;
/* rgb */ color: rgb(55, 123, 188);
/* oklch */ color: oklch(57.0% 0.122 250.0);

Tailwind

colors: {
  custom: {
    50: '#7ea0d0',
    500: '#377bbc',
    950: '#000000',
  },
}

SCSS

$custom: #377bbc;
$custom-light: #7ea0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#377bbc",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 188
  },
  "hsl": {
    "h": 209.323,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.57007,
    "c": 0.12194,
    "h": 250
  },
  "luminance": 0.18609
}

Semantic roles & 50–950 ramp

primary

#377BBC

secondary

#C9A786

accent

#924ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #377BBC

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

Preview Lab → · Contrast checker → · Palette generator →