#337C8B#337C8B

#337C8B is a mid, moderate cyan. Relative luminance 0.170; OKLCH L 54.7% C 0.075 H 213.4°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#337C8B
RGB	rgb(51, 124, 139)
HSL	hsl(190, 46%, 37%)
HSV	hsv(190, 63%, 55%)
CMYK	cmyk(63.3%, 10.8%, 0%, 45.5%)
CIE-LAB	lab(48.24, -17.75, -14.90)
CIE-LCH	lch(48.24, 23.17, 220.01°)
OKLab	oklab(54.68% -0.0627 -0.0413)
OKLCH	oklch(54.68% 0.075 213.4)
XYZ	xyz(13.2312, 16.9818, 27.0016)
Luminance	0.1698 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337C8B #8B4233

analogous

#338B6E #337C8B #33508B

triadic

#337C8B #8B337C #7C8B33

tetradic

#337C8B #6E338B #8B4233 #508B33

square

#337C8B #6E338B #8B4233 #508B33

split-complementary

#337C8B #8B3350 #8B6E33

monochromatic

#122C31 #23545E #337C8B #43A4B8 #6EBACA

Accessibility & contrast

On white

4.78

#337C8B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#337C8B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337C8B

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337C8B	#FFFFFF	#000000	##FFFFFF
##337C8B	1.00	4.78	4.40	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#71788C

Deuteranopia (green-blind)

#646E8B

Tritanopia (blue-blind)

#008281

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #337c8b;
/* rgb */ color: rgb(51, 124, 139);
/* oklch */ color: oklch(54.7% 0.075 213.4);

Tailwind

colors: {
  custom: {
    50: '#75a2ac',
    500: '#337c8b',
    950: '#000000',
  },
}

SCSS

$custom: #337c8b;
$custom-light: #75a2ac;
$custom-dark: #000000;

JSON

{
  "hex": "#337c8b",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 139
  },
  "hsl": {
    "h": 190.227,
    "s": 46.316,
    "l": 37.255
  },
  "oklch": {
    "l": 0.54681,
    "c": 0.07511,
    "h": 213.4
  },
  "luminance": 0.16983
}

Semantic roles & 50–950 ramp

primary

#337C8B

secondary

#B27568

accent

#6852D6

background

#F7F9FA

surface

#EDF2F4

border

#C8CCCE

text

#090F10

muted

#7B7E7F

Preview Lab

Preview with #337C8B

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

Preview Lab → · Contrast checker → · Palette generator →