#337DB9#337DB9

#337DB9 is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.2% C 0.118 H 246.5°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#337DB9
RGB	rgb(51, 125, 185)
HSL	hsl(207, 57%, 46%)
HSV	hsv(207, 72%, 73%)
CMYK	cmyk(72.4%, 32.4%, 0%, 27.5%)
CIE-LAB	lab(50.54, -2.61, -38.14)
CIE-LCH	lch(50.54, 38.23, 266.09°)
OKLab	oklab(57.17% -0.0471 -0.1081)
OKLCH	oklch(57.17% 0.118 246.5)
XYZ	xyz(17.4525, 18.8719, 48.6124)
Luminance	0.1887 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337DB9 #B96F33

analogous

#33B9B2 #337DB9 #333AB9

triadic

#337DB9 #B9337D #7DB933

tetradic

#337DB9 #B233B9 #B96F33 #3AB933

square

#337DB9 #B233B9 #B96F33 #3AB933

split-complementary

#337DB9 #B9333A #B9B233

monochromatic

#193C59 #265D89 #337DB9 #589BD1 #88B8DE

Accessibility & contrast

On white

4.40

#337DB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#337DB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337DB9

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337DB9	#FFFFFF	#000000	##000000
##337DB9	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627FBC

Deuteranopia (green-blind)

#4F73B8

Tritanopia (blue-blind)

#008B92

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337db9;
/* rgb */ color: rgb(51, 125, 185);
/* oklch */ color: oklch(57.2% 0.118 246.5);

Tailwind

colors: {
  custom: {
    50: '#7ca2ce',
    500: '#337db9',
    950: '#000000',
  },
}

SCSS

$custom: #337db9;
$custom-light: #7ca2ce;
$custom-dark: #000000;

JSON

{
  "hex": "#337db9",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 185
  },
  "hsl": {
    "h": 206.866,
    "s": 56.78,
    "l": 46.275
  },
  "oklch": {
    "l": 0.57167,
    "c": 0.11794,
    "h": 246.5
  },
  "luminance": 0.18874
}

Semantic roles & 50–950 ramp

primary

#337DB9

secondary

#C8A080

accent

#8C48E0

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0F13

muted

#7C7E82

Preview Lab

Preview with #337DB9

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

Preview Lab → · Contrast checker → · Palette generator →