#337CCB#337CCB

#337CCB is a mid, vivid cyan. Relative luminance 0.194; OKLCH L 58.0% C 0.141 H 253.0°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#337CCB
RGB	rgb(51, 124, 203)
HSL	hsl(211, 60%, 50%)
HSV	hsv(211, 75%, 80%)
CMYK	cmyk(74.9%, 38.9%, 0%, 20.4%)
CIE-LAB	lab(51.19, 4.54, -47.42)
CIE-LCH	lch(51.19, 47.63, 275.47°)
OKLab	oklab(57.98% -0.0414 -0.1353)
OKLCH	oklch(57.98% 0.141 253)
XYZ	xyz(19.3484, 19.4287, 59.2187)
Luminance	0.1943 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337CCB #CB8233

analogous

#33C8CB #337CCB #3633CB

triadic

#337CCB #CB337C #7CCB33

tetradic

#337CCB #CB33C8 #CB8233 #33CB36

square

#337CCB #CB33C8 #CB8233 #33CB36

split-complementary

#337CCB #CB3633 #C8CB33

monochromatic

#1A4069 #275E9A #337CCB #639BD8 #94BBE4

Accessibility & contrast

On white

4.30

#337CCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#337CCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337CCB

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337CCB	#FFFFFF	#000000	##000000
##337CCB	1.00	4.30	4.89	4.89
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5782CE

Deuteranopia (green-blind)

#3F74C9

Tritanopia (blue-blind)

#008F9A

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #337ccb;
/* rgb */ color: rgb(51, 124, 203);
/* oklch */ color: oklch(58.0% 0.141 253.0);

Tailwind

colors: {
  custom: {
    50: '#7fa1db',
    500: '#337ccb',
    950: '#000000',
  },
}

SCSS

$custom: #337ccb;
$custom-light: #7fa1db;
$custom-dark: #000000;

JSON

{
  "hex": "#337ccb",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 203
  },
  "hsl": {
    "h": 211.184,
    "s": 59.843,
    "l": 49.804
  },
  "oklch": {
    "l": 0.57983,
    "c": 0.14147,
    "h": 253
  },
  "luminance": 0.19431
}

Semantic roles & 50–950 ramp

primary

#337CCB

secondary

#CFAE8B

accent

#9745E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0B0E15

muted

#7C7E83

Preview Lab

Preview with #337CCB

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

Preview Lab → · Contrast checker → · Palette generator →