#337BBF#337BBF

#337BBF is a mid, vivid cyan. Relative luminance 0.186; OKLCH L 57.0% C 0.127 H 250.0°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#337BBF
RGB	rgb(51, 123, 191)
HSL	hsl(209, 58%, 47%)
HSV	hsv(209, 73%, 75%)
CMYK	cmyk(73.3%, 35.6%, 0%, 25.1%)
CIE-LAB	lab(50.25, 0.76, -42.04)
CIE-LCH	lch(50.25, 42.05, 271.04°)
OKLab	oklab(57.04% -0.0435 -0.1195)
OKLCH	oklch(57.04% 0.127 250)
XYZ	xyz(17.8486, 18.6293, 51.9353)
Luminance	0.1863 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BBF #BF7733

analogous

#33BFBD #337BBF #3335BF

triadic

#337BBF #BF337B #7BBF33

tetradic

#337BBF #BD33BF #BF7733 #35BF33

square

#337BBF #BD33BF #BF7733 #35BF33

split-complementary

#337BBF #BF3335 #BFBD33

monochromatic

#193D5E #265C8F #337BBF #5C99D3 #8CB7E0

Accessibility & contrast

On white

4.44

#337BBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#337BBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BBF

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BBF	#FFFFFF	#000000	##000000
##337BBF	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7FC2

Deuteranopia (green-blind)

#4772BE

Tritanopia (blue-blind)

#008B94

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337bbf;
/* rgb */ color: rgb(51, 123, 191);
/* oklch */ color: oklch(57.0% 0.127 250.0);

Tailwind

colors: {
  custom: {
    50: '#7da0d2',
    500: '#337bbf',
    950: '#000000',
  },
}

SCSS

$custom: #337bbf;
$custom-light: #7da0d2;
$custom-dark: #000000;

JSON

{
  "hex": "#337bbf",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 191
  },
  "hsl": {
    "h": 209.143,
    "s": 57.851,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57042,
    "c": 0.12721,
    "h": 250
  },
  "luminance": 0.18631
}

Semantic roles & 50–950 ramp

primary

#337BBF

secondary

#CBA683

accent

#9247E1

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #337BBF

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

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