#337BC5#337BC5

#337BC5 is a mid, vivid cyan. Relative luminance 0.189; OKLCH L 57.4% C 0.135 H 251.9°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#337BC5
RGB	rgb(51, 123, 197)
HSL	hsl(210, 59%, 49%)
HSV	hsv(210, 74%, 77%)
CMYK	cmyk(74.1%, 37.6%, 0%, 22.7%)
CIE-LAB	lab(50.57, 2.95, -44.97)
CIE-LCH	lch(50.57, 45.07, 273.75°)
OKLab	oklab(57.4% -0.0419 -0.1281)
OKLCH	oklch(57.4% 0.135 251.9)
XYZ	xyz(18.5225, 18.8988, 55.4841)
Luminance	0.1890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BC5 #C57D33

analogous

#33C4C5 #337BC5 #3433C5

triadic

#337BC5 #C5337B #7BC533

tetradic

#337BC5 #C533C4 #C57D33 #33C534

square

#337BC5 #C533C4 #C57D33 #33C534

split-complementary

#337BC5 #C53433 #C4C533

monochromatic

#1A3E64 #265D94 #337BC5 #5F9AD6 #90B9E2

Accessibility & contrast

On white

4.39

#337BC5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#337BC5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BC5

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BC5	#FFFFFF	#000000	##000000
##337BC5	1.00	4.39	4.78	4.78
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5980C8

Deuteranopia (green-blind)

#4372C4

Tritanopia (blue-blind)

#008C96

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337bc5;
/* rgb */ color: rgb(51, 123, 197);
/* oklch */ color: oklch(57.4% 0.135 251.9);

Tailwind

colors: {
  custom: {
    50: '#7ea0d7',
    500: '#337bc5',
    950: '#000000',
  },
}

SCSS

$custom: #337bc5;
$custom-light: #7ea0d7;
$custom-dark: #000000;

JSON

{
  "hex": "#337bc5",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 197
  },
  "hsl": {
    "h": 210.411,
    "s": 58.871,
    "l": 48.627
  },
  "oklch": {
    "l": 0.57395,
    "c": 0.13482,
    "h": 251.9
  },
  "luminance": 0.18901
}

Semantic roles & 50–950 ramp

primary

#337BC5

secondary

#CDAA87

accent

#9546E2

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0E14

muted

#7C7E83

Preview Lab

Preview with #337BC5

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

Preview Lab → · Contrast checker → · Palette generator →