#337AB4#337AB4

#337AB4 is a mid, moderate cyan. Relative luminance 0.179; OKLCH L 56.2% C 0.114 H 246.5°. Best body text is #000000 at 4.58:1 contrast (WCAG AA passes).

Color values

HEX	#337AB4
RGB	rgb(51, 122, 180)
HSL	hsl(207, 56%, 45%)
HSV	hsv(207, 72%, 71%)
CMYK	cmyk(71.7%, 32.2%, 0%, 29.4%)
CIE-LAB	lab(49.39, -2.61, -37.06)
CIE-LCH	lch(49.39, 37.15, 265.97°)
OKLab	oklab(56.19% -0.0457 -0.105)
OKLCH	oklch(56.19% 0.114 246.5)
XYZ	xyz(16.5599, 17.9163, 45.7566)
Luminance	0.1792 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337AB4 #B46D33

analogous

#33B4AD #337AB4 #3339B4

triadic

#337AB4 #B4337A #7AB433

tetradic

#337AB4 #AD33B4 #B46D33 #39B433

square

#337AB4 #AD33B4 #B46D33 #39B433

split-complementary

#337AB4 #B43339 #B4AD33

monochromatic

#183955 #255A84 #337AB4 #5598CF #85B5DC

Accessibility & contrast

On white

4.58

#337AB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#337AB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337AB4

4.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337AB4	#FFFFFF	#000000	##000000
##337AB4	1.00	4.58	4.58	4.58
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.58	21.00	1.00	1.00
##000000	4.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#607CB6

Deuteranopia (green-blind)

#4E70B3

Tritanopia (blue-blind)

#00888F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #337ab4;
/* rgb */ color: rgb(51, 122, 180);
/* oklch */ color: oklch(56.2% 0.114 246.5);

Tailwind

colors: {
  custom: {
    50: '#7ba0ca',
    500: '#337ab4',
    950: '#000000',
  },
}

SCSS

$custom: #337ab4;
$custom-light: #7ba0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337ab4",
  "rgb": {
    "r": 51,
    "g": 122,
    "b": 180
  },
  "hsl": {
    "h": 206.977,
    "s": 55.844,
    "l": 45.294
  },
  "oklch": {
    "l": 0.56186,
    "c": 0.11449,
    "h": 246.5
  },
  "luminance": 0.17918
}

Semantic roles & 50–950 ramp

primary

#337AB4

secondary

#C69E7D

accent

#8C49DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #337AB4

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

Preview Lab → · Contrast checker → · Palette generator →