#337C9D#337C9D

#337C9D is a mid, moderate cyan. Relative luminance 0.176; OKLCH L 55.5% C 0.088 H 230.9°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#337C9D
RGB	rgb(51, 124, 157)
HSL	hsl(199, 51%, 41%)
HSV	hsv(199, 68%, 62%)
CMYK	cmyk(67.5%, 21%, 0%, 38.4%)
CIE-LAB	lab(48.95, -11.83, -24.38)
CIE-LCH	lch(48.95, 27.10, 244.12°)
OKLab	oklab(55.48% -0.0555 -0.0683)
OKLCH	oklch(55.48% 0.088 230.9)
XYZ	xyz(14.6563, 17.5519, 34.5072)
Luminance	0.1755 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337C9D #9D5433

analogous

#339D89 #337C9D #33479D

triadic

#337C9D #9D337C #7C9D33

tetradic

#337C9D #89339D #9D5433 #479D33

square

#337C9D #89339D #9D5433 #479D33

split-complementary

#337C9D #9D3347 #9D8933

monochromatic

#153341 #24586F #337C9D #499EC4 #77B6D3

Accessibility & contrast

On white

4.66

#337C9D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#337C9D on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #337C9D

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337C9D	#FFFFFF	#000000	##FFFFFF
##337C9D	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B7A9F

Deuteranopia (green-blind)

#5D709D

Tritanopia (blue-blind)

#008587

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #337c9d;
/* rgb */ color: rgb(51, 124, 157);
/* oklch */ color: oklch(55.5% 0.088 230.9);

Tailwind

colors: {
  custom: {
    50: '#77a2ba',
    500: '#337c9d',
    950: '#000000',
  },
}

SCSS

$custom: #337c9d;
$custom-light: #77a2ba;
$custom-dark: #000000;

JSON

{
  "hex": "#337c9d",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 157
  },
  "hsl": {
    "h": 198.679,
    "s": 50.962,
    "l": 40.784
  },
  "oklch": {
    "l": 0.55485,
    "c": 0.08798,
    "h": 230.9
  },
  "luminance": 0.17553
}

Semantic roles & 50–950 ramp

primary

#337C9D

secondary

#BB8870

accent

#794DDA

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0F11

muted

#7C7E80

Preview Lab

Preview with #337C9D

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

Preview Lab → · Contrast checker → · Palette generator →