#337B8B#337B8B

#337B8B is a mid, moderate cyan. Relative luminance 0.167; OKLCH L 54.4% C 0.075 H 214.7°. Best body text is #FFFFFF at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#337B8B
RGB	rgb(51, 123, 139)
HSL	hsl(191, 46%, 37%)
HSV	hsv(191, 63%, 55%)
CMYK	cmyk(63.3%, 11.5%, 0%, 45.5%)
CIE-LAB	lab(47.92, -17.21, -15.38)
CIE-LCH	lch(47.92, 23.08, 221.79°)
OKLab	oklab(54.43% -0.0616 -0.0427)
OKLCH	oklch(54.43% 0.075 214.7)
XYZ	xyz(13.1065, 16.7325, 26.9601)
Luminance	0.1673 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337B8B #8B4333

analogous

#338B6F #337B8B #334F8B

triadic

#337B8B #8B337B #7B8B33

tetradic

#337B8B #6F338B #8B4333 #4F8B33

square

#337B8B #6F338B #8B4333 #4F8B33

split-complementary

#337B8B #8B334F #8B6F33

monochromatic

#122C31 #23535E #337B8B #43A3B8 #6EB9CA

Accessibility & contrast

On white

4.83

#337B8B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#337B8B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337B8B

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337B8B	#FFFFFF	#000000	##FFFFFF
##337B8B	1.00	4.83	4.35	4.83
#FFFFFF	4.83	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#70778C

Deuteranopia (green-blind)

#636E8B

Tritanopia (blue-blind)

#008180

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #337b8b;
/* rgb */ color: rgb(51, 123, 139);
/* oklch */ color: oklch(54.4% 0.075 214.7);

Tailwind

colors: {
  custom: {
    50: '#75a1ac',
    500: '#337b8b',
    950: '#000000',
  },
}

SCSS

$custom: #337b8b;
$custom-light: #75a1ac;
$custom-dark: #000000;

JSON

{
  "hex": "#337b8b",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 139
  },
  "hsl": {
    "h": 190.909,
    "s": 46.316,
    "l": 37.255
  },
  "oklch": {
    "l": 0.54427,
    "c": 0.07493,
    "h": 214.7
  },
  "luminance": 0.16734
}

Semantic roles & 50–950 ramp

primary

#337B8B

secondary

#B27568

accent

#6A52D6

background

#F7F9FA

surface

#EDF2F4

border

#C8CCCE

text

#090F10

muted

#7B7E7F

Preview Lab

Preview with #337B8B

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

Preview Lab → · Contrast checker → · Palette generator →