#337B9D#337B9D

#337B9D is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.2% C 0.088 H 232.0°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#337B9D
RGB	rgb(51, 123, 157)
HSL	hsl(199, 51%, 41%)
HSV	hsv(199, 68%, 62%)
CMYK	cmyk(67.5%, 21.7%, 0%, 38.4%)
CIE-LAB	lab(48.64, -11.26, -24.86)
CIE-LCH	lch(48.64, 27.29, 245.64°)
OKLab	oklab(55.24% -0.0544 -0.0697)
OKLCH	oklch(55.24% 0.088 232)
XYZ	xyz(14.5316, 17.3025, 34.4656)
Luminance	0.1730 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337B9D #9D5533

analogous

#339D8A #337B9D #33469D

triadic

#337B9D #9D337B #7B9D33

tetradic

#337B9D #8A339D #9D5533 #469D33

square

#337B9D #8A339D #9D5533 #469D33

split-complementary

#337B9D #9D3346 #9D8A33

monochromatic

#153341 #24576F #337B9D #499DC4 #77B6D3

Accessibility & contrast

On white

4.71

#337B9D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#337B9D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337B9D

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337B9D	#FFFFFF	#000000	##FFFFFF
##337B9D	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A7A9F

Deuteranopia (green-blind)

#5B6F9C

Tritanopia (blue-blind)

#008486

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #337b9d;
/* rgb */ color: rgb(51, 123, 157);
/* oklch */ color: oklch(55.2% 0.088 232.0);

Tailwind

colors: {
  custom: {
    50: '#77a1ba',
    500: '#337b9d',
    950: '#000000',
  },
}

SCSS

$custom: #337b9d;
$custom-light: #77a1ba;
$custom-dark: #000000;

JSON

{
  "hex": "#337b9d",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 157
  },
  "hsl": {
    "h": 199.245,
    "s": 50.962,
    "l": 40.784
  },
  "oklch": {
    "l": 0.55239,
    "c": 0.08839,
    "h": 232
  },
  "luminance": 0.17304
}

Semantic roles & 50–950 ramp

primary

#337B9D

secondary

#BB8870

accent

#7B4DDA

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E11

muted

#7C7E80

Preview Lab

Preview with #337B9D

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

Preview Lab → · Contrast checker → · Palette generator →