#337EA3#337EA3

#337EA3 is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.3% C 0.093 H 233.4°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#337EA3
RGB	rgb(51, 126, 163)
HSL	hsl(200, 52%, 42%)
HSV	hsv(200, 69%, 64%)
CMYK	cmyk(68.7%, 22.7%, 0%, 36.1%)
CIE-LAB	lab(49.82, -10.92, -26.53)
CIE-LCH	lch(49.82, 28.69, 247.62°)
OKLab	oklab(56.26% -0.0554 -0.0745)
OKLCH	oklch(56.26% 0.093 233.4)
XYZ	xyz(15.4344, 18.2682, 37.3559)
Luminance	0.1827 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337EA3 #A35833

analogous

#33A390 #337EA3 #3346A3

triadic

#337EA3 #A3337E #7EA333

tetradic

#337EA3 #9033A3 #A35833 #46A333

square

#337EA3 #9033A3 #A35833 #46A333

split-complementary

#337EA3 #A33346 #A39033

monochromatic

#163646 #245A74 #337EA3 #4C9EC7 #7BB8D6

Accessibility & contrast

On white

4.51

#337EA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#337EA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337EA3

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337EA3	#FFFFFF	#000000	##000000
##337EA3	1.00	4.51	4.65	4.65
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C7DA5

Deuteranopia (green-blind)

#5C72A2

Tritanopia (blue-blind)

#00888A

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337ea3;
/* rgb */ color: rgb(51, 126, 163);
/* oklch */ color: oklch(56.3% 0.093 233.4);

Tailwind

colors: {
  custom: {
    50: '#78a3be',
    500: '#337ea3',
    950: '#000000',
  },
}

SCSS

$custom: #337ea3;
$custom-light: #78a3be;
$custom-dark: #000000;

JSON

{
  "hex": "#337ea3",
  "rgb": {
    "r": 51,
    "g": 126,
    "b": 163
  },
  "hsl": {
    "h": 199.821,
    "s": 52.336,
    "l": 41.961
  },
  "oklch": {
    "l": 0.56264,
    "c": 0.0928,
    "h": 233.4
  },
  "luminance": 0.1827
}

Semantic roles & 50–950 ramp

primary

#337EA3

secondary

#BE8C73

accent

#7C4CDC

background

#F7FAFB

surface

#EEF3F6

border

#C9CDD0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #337EA3

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

Preview Lab → · Contrast checker → · Palette generator →