#337B9F#337B9F

#337B9F is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.3% C 0.090 H 233.6°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#337B9F
RGB	rgb(51, 123, 159)
HSL	hsl(200, 51%, 41%)
HSV	hsv(200, 68%, 62%)
CMYK	cmyk(67.9%, 22.6%, 0%, 37.6%)
CIE-LAB	lab(48.72, -10.57, -25.89)
CIE-LCH	lch(48.72, 27.97, 247.79°)
OKLab	oklab(55.34% -0.0536 -0.0727)
OKLCH	oklch(55.34% 0.09 233.6)
XYZ	xyz(14.7038, 17.3714, 35.3723)
Luminance	0.1737 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337B9F #9F5733

analogous

#339F8D #337B9F #33459F

triadic

#337B9F #9F337B #7B9F33

tetradic

#337B9F #8D339F #9F5733 #459F33

square

#337B9F #8D339F #9F5733 #459F33

split-complementary

#337B9F #9F3345 #9F8D33

monochromatic

#153342 #245771 #337B9F #4A9CC5 #79B5D4

Accessibility & contrast

On white

4.69

#337B9F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#337B9F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337B9F

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337B9F	#FFFFFF	#000000	##FFFFFF
##337B9F	1.00	4.69	4.47	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#697AA1

Deuteranopia (green-blind)

#5B6F9E

Tritanopia (blue-blind)

#008587

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #337b9f;
/* rgb */ color: rgb(51, 123, 159);
/* oklch */ color: oklch(55.3% 0.090 233.6);

Tailwind

colors: {
  custom: {
    50: '#77a1bb',
    500: '#337b9f',
    950: '#000000',
  },
}

SCSS

$custom: #337b9f;
$custom-light: #77a1bb;
$custom-dark: #000000;

JSON

{
  "hex": "#337b9f",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 159
  },
  "hsl": {
    "h": 200,
    "s": 51.429,
    "l": 41.176
  },
  "oklch": {
    "l": 0.55335,
    "c": 0.09031,
    "h": 233.6
  },
  "luminance": 0.17373
}

Semantic roles & 50–950 ramp

primary

#337B9F

secondary

#BC8A71

accent

#7C4DDB

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #337B9F

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

Preview Lab → · Contrast checker → · Palette generator →