#337B99#337B99

#337B99 is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.0% C 0.085 H 228.7°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#337B99
RGB	rgb(51, 123, 153)
HSL	hsl(198, 50%, 40%)
HSV	hsv(198, 67%, 60%)
CMYK	cmyk(66.7%, 19.6%, 0%, 40%)
CIE-LAB	lab(48.47, -12.61, -22.77)
CIE-LCH	lch(48.47, 26.03, 241.03°)
OKLab	oklab(55.05% -0.0559 -0.0637)
OKLCH	oklch(55.05% 0.085 228.7)
XYZ	xyz(14.1957, 17.1681, 32.6965)
Luminance	0.1717 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337B99 #995133

analogous

#339984 #337B99 #334899

triadic

#337B99 #99337B #7B9933

tetradic

#337B99 #843399 #995133 #489933

square

#337B99 #843399 #995133 #489933

split-complementary

#337B99 #993348 #998433

monochromatic

#14313D #24566B #337B99 #479EC2 #75B6D1

Accessibility & contrast

On white

4.74

#337B99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#337B99 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337B99

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337B99	#FFFFFF	#000000	##FFFFFF
##337B99	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B799A

Deuteranopia (green-blind)

#5D6F99

Tritanopia (blue-blind)

#008385

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #337b99;
/* rgb */ color: rgb(51, 123, 153);
/* oklch */ color: oklch(55.0% 0.085 228.7);

Tailwind

colors: {
  custom: {
    50: '#76a1b7',
    500: '#337b99',
    950: '#000000',
  },
}

SCSS

$custom: #337b99;
$custom-light: #76a1b7;
$custom-dark: #000000;

JSON

{
  "hex": "#337b99",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 153
  },
  "hsl": {
    "h": 197.647,
    "s": 50,
    "l": 40
  },
  "oklch": {
    "l": 0.55049,
    "c": 0.08476,
    "h": 228.7
  },
  "luminance": 0.1717
}

Semantic roles & 50–950 ramp

primary

#337B99

secondary

#B9846E

accent

#774EDA

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#090F11

muted

#7B7E80

Preview Lab

Preview with #337B99

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

Preview Lab → · Contrast checker → · Palette generator →