#337FAB#337FAB

#337FAB is a mid, moderate cyan. Relative luminance 0.188; OKLCH L 56.9% C 0.100 H 237.7°. Best body text is #000000 at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#337FAB
RGB	rgb(51, 127, 171)
HSL	hsl(202, 54%, 44%)
HSV	hsv(202, 70%, 67%)
CMYK	cmyk(70.2%, 25.7%, 0%, 32.9%)
CIE-LAB	lab(50.48, -8.73, -30.15)
CIE-LCH	lch(50.48, 31.39, 253.85°)
OKLab	oklab(56.9% -0.0536 -0.0849)
OKLCH	oklch(56.9% 0.1 237.7)
XYZ	xyz(16.3024, 18.8210, 41.2938)
Luminance	0.1882 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FAB #AB5F33

analogous

#33AB9B #337FAB #3343AB

triadic

#337FAB #AB337F #7FAB33

tetradic

#337FAB #9B33AB #AB5F33 #43AB33

square

#337FAB #9B33AB #AB5F33 #43AB33

split-complementary

#337FAB #AB3343 #AB9B33

monochromatic

#17394D #255C7C #337FAB #509ECB #7FB8D9

Accessibility & contrast

On white

4.41

#337FAB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.76

#337FAB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FAB

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FAB	#FFFFFF	#000000	##000000
##337FAB	1.00	4.41	4.76	4.76
#FFFFFF	4.41	1.00	21.00	21.00
#000000	4.76	21.00	1.00	1.00
##000000	4.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A7FAD

Deuteranopia (green-blind)

#5A73AA

Tritanopia (blue-blind)

#008A8E

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #337fab;
/* rgb */ color: rgb(51, 127, 171);
/* oklch */ color: oklch(56.9% 0.100 237.7);

Tailwind

colors: {
  custom: {
    50: '#79a4c4',
    500: '#337fab',
    950: '#000000',
  },
}

SCSS

$custom: #337fab;
$custom-light: #79a4c4;
$custom-dark: #000000;

JSON

{
  "hex": "#337fab",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 171
  },
  "hsl": {
    "h": 202,
    "s": 54.054,
    "l": 43.529
  },
  "oklch": {
    "l": 0.56902,
    "c": 0.1004,
    "h": 237.7
  },
  "luminance": 0.18823
}

Semantic roles & 50–950 ramp

primary

#337FAB

secondary

#C29378

accent

#804ADD

background

#F7FAFC

surface

#EEF3F8

border

#C9CDD1

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #337FAB

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

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