#377BBD#377BBD

#377BBD is a mid, vivid cyan. Relative luminance 0.187; OKLCH L 57.1% C 0.123 H 250.3°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#377BBD
RGB	rgb(55, 123, 189)
HSL	hsl(210, 55%, 48%)
HSV	hsv(210, 71%, 74%)
CMYK	cmyk(70.9%, 34.9%, 0%, 25.9%)
CIE-LAB	lab(50.28, 0.61, -40.84)
CIE-LCH	lch(50.28, 40.85, 270.86°)
OKLab	oklab(57.06% -0.0415 -0.116)
OKLCH	oklch(57.06% 0.123 250.3)
XYZ	xyz(17.8404, 18.6503, 50.7939)
Luminance	0.1865 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BBD #BD7937

analogous

#37BDBC #377BBD #3738BD

triadic

#377BBD #BD377B #7BBD37

tetradic

#377BBD #BC37BD #BD7937 #38BD37

square

#377BBD #BC37BD #BD7937 #38BD37

split-complementary

#377BBD #BD3738 #BDBC37

monochromatic

#1B3D5E #295C8E #377BBD #6099D1 #90B8DF

Accessibility & contrast

On white

4.44

#377BBD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#377BBD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BBD

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BBD	#FFFFFF	#000000	##000000
##377BBD	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7FC0

Deuteranopia (green-blind)

#4A72BC

Tritanopia (blue-blind)

#008B93

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377bbd;
/* rgb */ color: rgb(55, 123, 189);
/* oklch */ color: oklch(57.1% 0.123 250.3);

Tailwind

colors: {
  custom: {
    50: '#7ea0d1',
    500: '#377bbd',
    950: '#000000',
  },
}

SCSS

$custom: #377bbd;
$custom-light: #7ea0d1;
$custom-dark: #000000;

JSON

{
  "hex": "#377bbd",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 189
  },
  "hsl": {
    "h": 209.552,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.57064,
    "c": 0.12321,
    "h": 250.3
  },
  "luminance": 0.18652
}

Semantic roles & 50–950 ramp

primary

#377BBD

secondary

#C9A786

accent

#934ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #377BBD

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

Preview Lab → · Contrast checker → · Palette generator →