#337BA3#337BA3

#337BA3 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.5% C 0.094 H 236.4°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#337BA3
RGB	rgb(51, 123, 163)
HSL	hsl(201, 52%, 42%)
HSV	hsv(201, 69%, 64%)
CMYK	cmyk(68.7%, 24.5%, 0%, 36.1%)
CIE-LAB	lab(48.90, -9.20, -27.96)
CIE-LCH	lch(48.90, 29.43, 251.79°)
OKLab	oklab(55.53% -0.0522 -0.0786)
OKLCH	oklch(55.53% 0.094 236.4)
XYZ	xyz(15.0565, 17.5124, 37.2300)
Luminance	0.1751 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BA3 #A35B33

analogous

#33A393 #337BA3 #3343A3

triadic

#337BA3 #A3337B #7BA333

tetradic

#337BA3 #9333A3 #A35B33 #43A333

square

#337BA3 #9333A3 #A35B33 #43A333

split-complementary

#337BA3 #A33343 #A39333

monochromatic

#163546 #245874 #337BA3 #4C9BC7 #7BB5D6

Accessibility & contrast

On white

4.66

#337BA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#337BA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #337BA3

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BA3	#FFFFFF	#000000	##FFFFFF
##337BA3	1.00	4.66	4.50	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#687AA5

Deuteranopia (green-blind)

#596FA2

Tritanopia (blue-blind)

#008589

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #337ba3;
/* rgb */ color: rgb(51, 123, 163);
/* oklch */ color: oklch(55.5% 0.094 236.4);

Tailwind

colors: {
  custom: {
    50: '#78a1be',
    500: '#337ba3',
    950: '#000000',
  },
}

SCSS

$custom: #337ba3;
$custom-light: #78a1be;
$custom-dark: #000000;

JSON

{
  "hex": "#337ba3",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 163
  },
  "hsl": {
    "h": 201.429,
    "s": 52.336,
    "l": 41.961
  },
  "oklch": {
    "l": 0.55532,
    "c": 0.09436,
    "h": 236.4
  },
  "luminance": 0.17514
}

Semantic roles & 50–950 ramp

primary

#337BA3

secondary

#BE8E73

accent

#7F4CDC

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #337BA3

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

Preview Lab → · Contrast checker → · Palette generator →