#337BC4#337BC4

#337BC4 is a mid, vivid cyan. Relative luminance 0.189; OKLCH L 57.3% C 0.134 H 251.6°. Best body text is #000000 at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#337BC4
RGB	rgb(51, 123, 196)
HSL	hsl(210, 59%, 48%)
HSV	hsv(210, 74%, 77%)
CMYK	cmyk(74%, 37.2%, 0%, 23.1%)
CIE-LAB	lab(50.52, 2.58, -44.49)
CIE-LCH	lch(50.52, 44.56, 273.32°)
OKLab	oklab(57.34% -0.0422 -0.1267)
OKLCH	oklch(57.34% 0.134 251.6)
XYZ	xyz(18.4083, 18.8532, 54.8827)
Luminance	0.1885 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BC4 #C47C33

analogous

#33C3C4 #337BC4 #3433C4

triadic

#337BC4 #C4337B #7BC433

tetradic

#337BC4 #C433C3 #C47C33 #33C434

square

#337BC4 #C433C3 #C47C33 #33C434

split-complementary

#337BC4 #C43433 #C3C433

monochromatic

#1A3E63 #265D93 #337BC4 #5F9AD5 #8FB8E2

Accessibility & contrast

On white

4.40

#337BC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.77

#337BC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BC4

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BC4	#FFFFFF	#000000	##000000
##337BC4	1.00	4.40	4.77	4.77
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.77	21.00	1.00	1.00
##000000	4.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5980C7

Deuteranopia (green-blind)

#4372C3

Tritanopia (blue-blind)

#008C96

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337bc4;
/* rgb */ color: rgb(51, 123, 196);
/* oklch */ color: oklch(57.3% 0.134 251.6);

Tailwind

colors: {
  custom: {
    50: '#7ea0d6',
    500: '#337bc4',
    950: '#000000',
  },
}

SCSS

$custom: #337bc4;
$custom-light: #7ea0d6;
$custom-dark: #000000;

JSON

{
  "hex": "#337bc4",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 196
  },
  "hsl": {
    "h": 210.207,
    "s": 58.704,
    "l": 48.431
  },
  "oklch": {
    "l": 0.57335,
    "c": 0.13354,
    "h": 251.6
  },
  "luminance": 0.18855
}

Semantic roles & 50–950 ramp

primary

#337BC4

secondary

#CDAA86

accent

#9446E2

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0E14

muted

#7C7E83

Preview Lab

Preview with #337BC4

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

Preview Lab → · Contrast checker → · Palette generator →