#377BC9#377BC9

#377BC9 is a mid, vivid cyan. Relative luminance 0.192; OKLCH L 57.8% C 0.139 H 253.9°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#377BC9
RGB	rgb(55, 123, 201)
HSL	hsl(212, 57%, 50%)
HSV	hsv(212, 73%, 79%)
CMYK	cmyk(72.6%, 38.8%, 0%, 21.2%)
CIE-LAB	lab(50.91, 4.95, -46.70)
CIE-LCH	lch(50.91, 46.97, 276.05°)
OKLab	oklab(57.77% -0.0385 -0.1331)
OKLCH	oklch(57.77% 0.139 253.9)
XYZ	xyz(19.1972, 19.1931, 57.9399)
Luminance	0.1920 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377BC9 #C98537

analogous

#37C4C9 #377BC9 #3C37C9

triadic

#377BC9 #C9377B #7BC937

tetradic

#377BC9 #C937C4 #C98537 #37C93C

square

#377BC9 #C937C4 #C98537 #37C93C

split-complementary

#377BC9 #C93C37 #C4C937

monochromatic

#1C4069 #295E99 #377BC9 #679BD6 #97BBE3

Accessibility & contrast

On white

4.34

#377BC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#377BC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377BC9

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377BC9	#FFFFFF	#000000	##000000
##377BC9	1.00	4.34	4.84	4.84
#FFFFFF	4.34	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5781CC

Deuteranopia (green-blind)

#4073C7

Tritanopia (blue-blind)

#008D98

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #377bc9;
/* rgb */ color: rgb(55, 123, 201);
/* oklch */ color: oklch(57.8% 0.139 253.9);

Tailwind

colors: {
  custom: {
    50: '#80a0da',
    500: '#377bc9',
    950: '#000000',
  },
}

SCSS

$custom: #377bc9;
$custom-light: #80a0da;
$custom-dark: #000000;

JSON

{
  "hex": "#377bc9",
  "rgb": {
    "r": 55,
    "g": 123,
    "b": 201
  },
  "hsl": {
    "h": 212.055,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.5777,
    "c": 0.1386,
    "h": 253.9
  },
  "luminance": 0.19195
}

Semantic roles & 50–950 ramp

primary

#377BC9

secondary

#CFB08D

accent

#9947E1

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #377BC9

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

Preview Lab → · Contrast checker → · Palette generator →