#337BBC#337BBC

#337BBC is a mid, vivid cyan. Relative luminance 0.185; OKLCH L 56.9% C 0.123 H 249.0°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#337BBC
RGB	rgb(51, 123, 188)
HSL	hsl(208, 57%, 47%)
HSV	hsv(208, 73%, 74%)
CMYK	cmyk(72.9%, 34.6%, 0%, 26.3%)
CIE-LAB	lab(50.10, -0.33, -40.56)
CIE-LCH	lch(50.10, 40.56, 269.54°)
OKLab	oklab(56.87% -0.0443 -0.1152)
OKLCH	oklch(56.87% 0.123 249)
XYZ	xyz(17.5219, 18.4986, 50.2143)
Luminance	0.1850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BBC #BC7433

analogous

#33BCB9 #337BBC #3337BC

triadic

#337BBC #BC337B #7BBC33

tetradic

#337BBC #B933BC #BC7433 #37BC33

square

#337BBC #B933BC #BC7433 #37BC33

split-complementary

#337BBC #BC3337 #BCB933

monochromatic

#193C5C #265C8C #337BBC #5A99D2 #8AB7DF

Accessibility & contrast

On white

4.47

#337BBC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#337BBC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BBC

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BBC	#FFFFFF	#000000	##000000
##337BBC	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7EBF

Deuteranopia (green-blind)

#4A71BB

Tritanopia (blue-blind)

#008A93

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337bbc;
/* rgb */ color: rgb(51, 123, 188);
/* oklch */ color: oklch(56.9% 0.123 249.0);

Tailwind

colors: {
  custom: {
    50: '#7ca0d0',
    500: '#337bbc',
    950: '#000000',
  },
}

SCSS

$custom: #337bbc;
$custom-light: #7ca0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#337bbc",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 188
  },
  "hsl": {
    "h": 208.467,
    "s": 57.322,
    "l": 46.863
  },
  "oklch": {
    "l": 0.56869,
    "c": 0.12345,
    "h": 249
  },
  "luminance": 0.18501
}

Semantic roles & 50–950 ramp

primary

#337BBC

secondary

#C9A481

accent

#9047E1

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #337BBC

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

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