#337CBF#337CBF

#337CBF is a mid, vivid cyan. Relative luminance 0.189; OKLCH L 57.3% C 0.126 H 249.4°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#337CBF
RGB	rgb(51, 124, 191)
HSL	hsl(209, 58%, 47%)
HSV	hsv(209, 73%, 75%)
CMYK	cmyk(73.3%, 35.1%, 0%, 25.1%)
CIE-LAB	lab(50.55, 0.16, -41.57)
CIE-LCH	lch(50.55, 41.58, 270.22°)
OKLab	oklab(57.27% -0.0445 -0.1182)
OKLCH	oklch(57.27% 0.126 249.4)
XYZ	xyz(17.9733, 18.8787, 51.9768)
Luminance	0.1888 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337CBF #BF7633

analogous

#33BFBC #337CBF #3336BF

triadic

#337CBF #BF337C #7CBF33

tetradic

#337CBF #BC33BF #BF7633 #36BF33

square

#337CBF #BC33BF #BF7633 #36BF33

split-complementary

#337CBF #BF3336 #BFBC33

monochromatic

#193D5E #265D8F #337CBF #5C9AD3 #8CB8E0

Accessibility & contrast

On white

4.40

#337CBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#337CBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337CBF

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337CBF	#FFFFFF	#000000	##000000
##337CBF	1.00	4.40	4.78	4.78
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7FC2

Deuteranopia (green-blind)

#4972BE

Tritanopia (blue-blind)

#008C94

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337cbf;
/* rgb */ color: rgb(51, 124, 191);
/* oklch */ color: oklch(57.3% 0.126 249.4);

Tailwind

colors: {
  custom: {
    50: '#7da1d2',
    500: '#337cbf',
    950: '#000000',
  },
}

SCSS

$custom: #337cbf;
$custom-light: #7da1d2;
$custom-dark: #000000;

JSON

{
  "hex": "#337cbf",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 191
  },
  "hsl": {
    "h": 208.714,
    "s": 57.851,
    "l": 47.451
  },
  "oklch": {
    "l": 0.57273,
    "c": 0.12624,
    "h": 249.4
  },
  "luminance": 0.18881
}

Semantic roles & 50–950 ramp

primary

#337CBF

secondary

#CBA583

accent

#9147E1

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #337CBF

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

Preview Lab → · Contrast checker → · Palette generator →