#337AB3#337AB3

#337AB3 is a mid, moderate cyan. Relative luminance 0.179; OKLCH L 56.1% C 0.113 H 246.1°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#337AB3
RGB	rgb(51, 122, 179)
HSL	hsl(207, 56%, 45%)
HSV	hsv(207, 72%, 70%)
CMYK	cmyk(71.5%, 31.8%, 0%, 29.8%)
CIE-LAB	lab(49.34, -2.97, -36.56)
CIE-LCH	lch(49.34, 36.68, 265.35°)
OKLab	oklab(56.13% -0.0459 -0.1035)
OKLCH	oklch(56.13% 0.113 246.1)
XYZ	xyz(16.4584, 17.8757, 45.2221)
Luminance	0.1788 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337AB3 #B36C33

analogous

#33B3AC #337AB3 #333AB3

triadic

#337AB3 #B3337A #7AB333

tetradic

#337AB3 #AC33B3 #B36C33 #3AB333

square

#337AB3 #AC33B3 #B36C33 #3AB333

split-complementary

#337AB3 #B3333A #B3AC33

monochromatic

#183954 #255A83 #337AB3 #5598CE #84B5DC

Accessibility & contrast

On white

4.59

#337AB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#337AB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #337AB3

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337AB3	#FFFFFF	#000000	##FFFFFF
##337AB3	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#607CB5

Deuteranopia (green-blind)

#4E70B2

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #337ab3;
/* rgb */ color: rgb(51, 122, 179);
/* oklch */ color: oklch(56.1% 0.113 246.1);

Tailwind

colors: {
  custom: {
    50: '#7aa0ca',
    500: '#337ab3',
    950: '#000000',
  },
}

SCSS

$custom: #337ab3;
$custom-light: #7aa0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#337ab3",
  "rgb": {
    "r": 51,
    "g": 122,
    "b": 179
  },
  "hsl": {
    "h": 206.719,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.56131,
    "c": 0.11328,
    "h": 246.1
  },
  "luminance": 0.17878
}

Semantic roles & 50–950 ramp

primary

#337AB3

secondary

#C69D7C

accent

#8C49DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #337AB3

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

Preview Lab → · Contrast checker → · Palette generator →