#337AB5#337AB5

#337AB5 is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 56.2% C 0.116 H 246.9°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#337AB5
RGB	rgb(51, 122, 181)
HSL	hsl(207, 56%, 45%)
HSV	hsv(207, 72%, 71%)
CMYK	cmyk(71.8%, 32.6%, 0%, 29%)
CIE-LAB	lab(49.44, -2.25, -37.56)
CIE-LCH	lch(49.44, 37.62, 266.57°)
OKLab	oklab(56.24% -0.0453 -0.1065)
OKLCH	oklch(56.24% 0.116 246.9)
XYZ	xyz(16.6621, 17.9572, 46.2951)
Luminance	0.1796 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337AB5 #B56E33

analogous

#33B5AF #337AB5 #3339B5

triadic

#337AB5 #B5337A #7AB533

tetradic

#337AB5 #AF33B5 #B56E33 #39B533

square

#337AB5 #AF33B5 #B56E33 #39B533

split-complementary

#337AB5 #B53339 #B5AF33

monochromatic

#183A56 #265A85 #337AB5 #5698CF #86B5DD

Accessibility & contrast

On white

4.57

#337AB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#337AB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337AB5

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337AB5	#FFFFFF	#000000	##000000
##337AB5	1.00	4.57	4.59	4.59
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F7CB8

Deuteranopia (green-blind)

#4D70B4

Tritanopia (blue-blind)

#00888F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337ab5;
/* rgb */ color: rgb(51, 122, 181);
/* oklch */ color: oklch(56.2% 0.116 246.9);

Tailwind

colors: {
  custom: {
    50: '#7ba0cb',
    500: '#337ab5',
    950: '#000000',
  },
}

SCSS

$custom: #337ab5;
$custom-light: #7ba0cb;
$custom-dark: #000000;

JSON

{
  "hex": "#337ab5",
  "rgb": {
    "r": 51,
    "g": 122,
    "b": 181
  },
  "hsl": {
    "h": 207.231,
    "s": 56.034,
    "l": 45.49
  },
  "oklch": {
    "l": 0.56241,
    "c": 0.11572,
    "h": 246.9
  },
  "luminance": 0.17959
}

Semantic roles & 50–950 ramp

primary

#337AB5

secondary

#C69F7D

accent

#8D48DF

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #337AB5

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

Preview Lab → · Contrast checker → · Palette generator →