#377BBF#377BBF

#377BBF is a mid, vivid cyan. Relative luminance 0.187; OKLCH L 57.2% C 0.126 H 251.0°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#377BBF
RGB	rgb(55, 123, 191)
HSL	hsl(210, 55%, 48%)
HSV	hsv(210, 71%, 75%)
CMYK	cmyk(71.2%, 35.6%, 0%, 25.1%)
CIE-LAB	lab(50.38, 1.33, -41.83)
CIE-LCH	lch(50.38, 41.85, 271.82°)
OKLab	oklab(57.18% -0.041 -0.1189)
OKLCH	oklch(57.18% 0.126 251)
XYZ	xyz(18.0590, 18.7378, 51.9451)
Luminance	0.1874 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BBF #BF7B37

analogous

#37BFBF #377BBF #3737BF

triadic

#377BBF #BF377B #7BBF37

tetradic

#377BBF #BF37BF #BF7B37 #37BF37

square

#377BBF #BF37BF #BF7B37 #37BF37

split-complementary

#377BBF #BF3737 #BFBF37

monochromatic

#1C3E60 #295C8F #377BBF #629AD2 #91B8DF

Accessibility & contrast

On white

4.42

#377BBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#377BBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BBF

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

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

#5C7FC2

Deuteranopia (green-blind)

#4972BE

Tritanopia (blue-blind)

#008B94

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #377bbf;
/* rgb */ color: rgb(55, 123, 191);
/* oklch */ color: oklch(57.2% 0.126 251.0);

Tailwind

colors: {
  custom: {
    50: '#7ea0d2',
    500: '#377bbf',
    950: '#000000',
  },
}

SCSS

$custom: #377bbf;
$custom-light: #7ea0d2;
$custom-dark: #000000;

JSON

{
  "hex": "#377bbf",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 191
  },
  "hsl": {
    "h": 210,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.57179,
    "c": 0.12575,
    "h": 251
  },
  "luminance": 0.1874
}

Semantic roles & 50–950 ramp

primary

#377BBF

secondary

#CAA988

accent

#9449DF

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #377BBF

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

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