#337DA4#337DA4

#337DA4 is a mid, moderate cyan. Relative luminance 0.181; OKLCH L 56.1% C 0.094 H 235.1°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#337DA4
RGB	rgb(51, 125, 164)
HSL	hsl(201, 53%, 42%)
HSV	hsv(201, 69%, 64%)
CMYK	cmyk(68.9%, 23.8%, 0%, 35.7%)
CIE-LAB	lab(49.56, -10.01, -27.52)
CIE-LCH	lch(49.56, 29.28, 250.02°)
OKLab	oklab(56.07% -0.054 -0.0773)
OKLCH	oklch(56.07% 0.094 235.1)
XYZ	xyz(15.3971, 18.0497, 37.7872)
Luminance	0.1805 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337DA4 #A45A33

analogous

#33A493 #337DA4 #3345A4

triadic

#337DA4 #A4337D #7DA433

tetradic

#337DA4 #9333A4 #A45A33 #45A433

square

#337DA4 #9333A4 #A45A33 #45A433

split-complementary

#337DA4 #A43345 #A49333

monochromatic

#163647 #245975 #337DA4 #4D9DC8 #7BB7D6

Accessibility & contrast

On white

4.56

#337DA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#337DA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337DA4

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337DA4	#FFFFFF	#000000	##000000
##337DA4	1.00	4.56	4.61	4.61
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A7CA6

Deuteranopia (green-blind)

#5B71A3

Tritanopia (blue-blind)

#00878A

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337da4;
/* rgb */ color: rgb(51, 125, 164);
/* oklch */ color: oklch(56.1% 0.094 235.1);

Tailwind

colors: {
  custom: {
    50: '#78a2bf',
    500: '#337da4',
    950: '#000000',
  },
}

SCSS

$custom: #337da4;
$custom-light: #78a2bf;
$custom-dark: #000000;

JSON

{
  "hex": "#337da4",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 164
  },
  "hsl": {
    "h": 200.708,
    "s": 52.558,
    "l": 42.157
  },
  "oklch": {
    "l": 0.56069,
    "c": 0.09429,
    "h": 235.1
  },
  "luminance": 0.18051
}

Semantic roles & 50–950 ramp

primary

#337DA4

secondary

#BF8E74

accent

#7E4CDC

background

#F7F9FB

surface

#EEF2F7

border

#C9CCD0

text

#0A0F12

muted

#7C7E81

Preview Lab

Preview with #337DA4

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

Preview Lab → · Contrast checker → · Palette generator →