#337BC9#337BC9

#337BC9 is a mid, vivid cyan. Relative luminance 0.191; OKLCH L 57.6% C 0.140 H 253.0°. Best body text is #000000 at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#337BC9
RGB	rgb(51, 123, 201)
HSL	hsl(211, 60%, 49%)
HSV	hsv(211, 75%, 79%)
CMYK	cmyk(74.6%, 38.8%, 0%, 21.2%)
CIE-LAB	lab(50.79, 4.42, -46.91)
CIE-LCH	lch(50.79, 47.12, 275.38°)
OKLab	oklab(57.64% -0.041 -0.1338)
OKLCH	oklch(57.64% 0.14 253)
XYZ	xyz(18.9869, 19.0846, 57.9300)
Luminance	0.1909 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BC9 #C98133

analogous

#33C6C9 #337BC9 #3633C9

triadic

#337BC9 #C9337B #7BC933

tetradic

#337BC9 #C933C6 #C98133 #33C936

square

#337BC9 #C933C6 #C98133 #33C936

split-complementary

#337BC9 #C93633 #C6C933

monochromatic

#1A3F67 #275D98 #337BC9 #629AD7 #93BAE4

Accessibility & contrast

On white

4.36

#337BC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.82

#337BC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BC9

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BC9	#FFFFFF	#000000	##000000
##337BC9	1.00	4.36	4.82	4.82
#FFFFFF	4.36	1.00	21.00	21.00
#000000	4.82	21.00	1.00	1.00
##000000	4.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5680CC

Deuteranopia (green-blind)

#3F73C7

Tritanopia (blue-blind)

#008D98

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #337bc9;
/* rgb */ color: rgb(51, 123, 201);
/* oklch */ color: oklch(57.6% 0.140 253.0);

Tailwind

colors: {
  custom: {
    50: '#7fa0da',
    500: '#337bc9',
    950: '#000000',
  },
}

SCSS

$custom: #337bc9;
$custom-light: #7fa0da;
$custom-dark: #000000;

JSON

{
  "hex": "#337bc9",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 201
  },
  "hsl": {
    "h": 211.2,
    "s": 59.524,
    "l": 49.412
  },
  "oklch": {
    "l": 0.57635,
    "c": 0.13994,
    "h": 253
  },
  "luminance": 0.19087
}

Semantic roles & 50–950 ramp

primary

#337BC9

secondary

#CFAD89

accent

#9745E3

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0B0E15

muted

#7C7E83

Preview Lab

Preview with #337BC9

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

Preview Lab → · Contrast checker → · Palette generator →