#337FAD#337FAD

#337FAD is a mid, moderate cyan. Relative luminance 0.189; OKLCH L 57.0% C 0.103 H 238.9°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#337FAD
RGB	rgb(51, 127, 173)
HSL	hsl(203, 54%, 44%)
HSV	hsv(203, 71%, 68%)
CMYK	cmyk(70.5%, 26.6%, 0%, 32.2%)
CIE-LAB	lab(50.57, -8.04, -31.17)
CIE-LCH	lch(50.57, 32.19, 255.54°)
OKLab	oklab(57% -0.0529 -0.0878)
OKLCH	oklch(57% 0.103 238.9)
XYZ	xyz(16.4945, 18.8979, 42.3054)
Luminance	0.1890 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FAD #AD6133

analogous

#33AD9E #337FAD #3342AD

triadic

#337FAD #AD337F #7FAD33

tetradic

#337FAD #9E33AD #AD6133 #42AD33

square

#337FAD #9E33AD #AD6133 #42AD33

split-complementary

#337FAD #AD3342 #AD9E33

monochromatic

#173A4E #255C7E #337FAD #519ECC #81B8DA

Accessibility & contrast

On white

4.39

#337FAD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#337FAD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FAD

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FAD	#FFFFFF	#000000	##000000
##337FAD	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)

#6A7FAF

Deuteranopia (green-blind)

#5973AC

Tritanopia (blue-blind)

#008B8F

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337fad;
/* rgb */ color: rgb(51, 127, 173);
/* oklch */ color: oklch(57.0% 0.103 238.9);

Tailwind

colors: {
  custom: {
    50: '#7aa4c5',
    500: '#337fad',
    950: '#000000',
  },
}

SCSS

$custom: #337fad;
$custom-light: #7aa4c5;
$custom-dark: #000000;

JSON

{
  "hex": "#337fad",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 173
  },
  "hsl": {
    "h": 202.623,
    "s": 54.464,
    "l": 43.922
  },
  "oklch": {
    "l": 0.57004,
    "c": 0.10254,
    "h": 238.9
  },
  "luminance": 0.189
}

Semantic roles & 50–950 ramp

primary

#337FAD

secondary

#C39579

accent

#824ADE

background

#F7FAFC

surface

#EEF3F8

border

#C9CDD1

text

#0A0F13

muted

#7C7F82

Preview Lab

Preview with #337FAD

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

Preview Lab → · Contrast checker → · Palette generator →