#377CCB#377CCB

#377CCB is a mid, vivid cyan. Relative luminance 0.195; OKLCH L 58.1% C 0.140 H 253.9°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#377CCB
RGB	rgb(55, 124, 203)
HSL	hsl(212, 59%, 51%)
HSV	hsv(212, 73%, 80%)
CMYK	cmyk(72.9%, 38.9%, 0%, 20.4%)
CIE-LAB	lab(51.31, 5.06, -47.21)
CIE-LCH	lch(51.31, 47.48, 276.12°)
OKLab	oklab(58.12% -0.0389 -0.1346)
OKLCH	oklch(58.12% 0.14 253.9)
XYZ	xyz(19.5587, 19.5371, 59.2286)
Luminance	0.1954 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#377CCB #CB8637

analogous

#37C6CB #377CCB #3C37CB

triadic

#377CCB #CB377C #7CCB37

tetradic

#377CCB #CB37C6 #CB8637 #37CB3C

square

#377CCB #CB37C6 #CB8637 #37CB3C

split-complementary

#377CCB #CB3C37 #C6CB37

monochromatic

#1C416C #295E9C #377CCB #689CD8 #98BCE4

Accessibility & contrast

On white

4.28

#377CCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#377CCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #377CCB

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##377CCB	#FFFFFF	#000000	##000000
##377CCB	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5782CE

Deuteranopia (green-blind)

#4074C9

Tritanopia (blue-blind)

#008F9A

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #377ccb;
/* rgb */ color: rgb(55, 124, 203);
/* oklch */ color: oklch(58.1% 0.140 253.9);

Tailwind

colors: {
  custom: {
    50: '#80a1db',
    500: '#377ccb',
    950: '#000000',
  },
}

SCSS

$custom: #377ccb;
$custom-light: #80a1db;
$custom-dark: #000000;

JSON

{
  "hex": "#377ccb",
  "rgb": {
    "r": 55,
    "g": 124,
    "b": 203
  },
  "hsl": {
    "h": 212.027,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.58115,
    "c": 0.14013,
    "h": 253.9
  },
  "luminance": 0.19539
}

Semantic roles & 50–950 ramp

primary

#377CCB

secondary

#D0B18E

accent

#9946E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #377CCB

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

Preview Lab → · Contrast checker → · Palette generator →