#337CA3#337CA3

#337CA3 is a mid, moderate cyan. Relative luminance 0.178; OKLCH L 55.8% C 0.094 H 235.4°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#337CA3
RGB	rgb(51, 124, 163)
HSL	hsl(201, 52%, 42%)
HSV	hsv(201, 69%, 64%)
CMYK	cmyk(68.7%, 23.9%, 0%, 36.1%)
CIE-LAB	lab(49.21, -9.77, -27.48)
CIE-LCH	lch(49.21, 29.17, 250.42°)
OKLab	oklab(55.78% -0.0533 -0.0772)
OKLCH	oklch(55.78% 0.094 235.4)
XYZ	xyz(15.1812, 17.7618, 37.2715)
Luminance	0.1776 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337CA3 #A35A33

analogous

#33A392 #337CA3 #3344A3

triadic

#337CA3 #A3337C #7CA333

tetradic

#337CA3 #9233A3 #A35A33 #44A333

square

#337CA3 #9233A3 #A35A33 #44A333

split-complementary

#337CA3 #A33344 #A39233

monochromatic

#163546 #245974 #337CA3 #4C9CC7 #7BB6D6

Accessibility & contrast

On white

4.61

#337CA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#337CA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #337CA3

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337CA3	#FFFFFF	#000000	##FFFFFF
##337CA3	1.00	4.61	4.55	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#697BA5

Deuteranopia (green-blind)

#5A70A2

Tritanopia (blue-blind)

#008689

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #337ca3;
/* rgb */ color: rgb(51, 124, 163);
/* oklch */ color: oklch(55.8% 0.094 235.4);

Tailwind

colors: {
  custom: {
    50: '#78a1be',
    500: '#337ca3',
    950: '#000000',
  },
}

SCSS

$custom: #337ca3;
$custom-light: #78a1be;
$custom-dark: #000000;

JSON

{
  "hex": "#337ca3",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 163
  },
  "hsl": {
    "h": 200.893,
    "s": 52.336,
    "l": 41.961
  },
  "oklch": {
    "l": 0.55775,
    "c": 0.0938,
    "h": 235.4
  },
  "luminance": 0.17763
}

Semantic roles & 50–950 ramp

primary

#337CA3

secondary

#BE8E73

accent

#7E4CDC

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0F12

muted

#7C7E81

Preview Lab

Preview with #337CA3

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

Preview Lab → · Contrast checker → · Palette generator →