#337F9D#337F9D

#337F9D is a mid, moderate cyan. Relative luminance 0.183; OKLCH L 56.2% C 0.087 H 227.5°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#337F9D
RGB	rgb(51, 127, 157)
HSL	hsl(197, 51%, 41%)
HSV	hsv(197, 68%, 62%)
CMYK	cmyk(67.5%, 19.1%, 0%, 38.4%)
CIE-LAB	lab(49.88, -13.52, -22.95)
CIE-LCH	lch(49.88, 26.63, 239.49°)
OKLab	oklab(56.23% -0.0587 -0.0642)
OKLCH	oklch(56.23% 0.087 227.5)
XYZ	xyz(15.0380, 18.3153, 34.6344)
Luminance	0.1832 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337F9D #9D5133

analogous

#339D86 #337F9D #334A9D

triadic

#337F9D #9D337F #7F9D33

tetradic

#337F9D #86339D #9D5133 #4A9D33

square

#337F9D #86339D #9D5133 #4A9D33

split-complementary

#337F9D #9D334A #9D8633

monochromatic

#153441 #245A6F #337F9D #49A1C4 #77B9D3

Accessibility & contrast

On white

4.50

#337F9D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#337F9D on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337F9D

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337F9D	#FFFFFF	#000000	##000000
##337F9D	1.00	4.50	4.66	4.66
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F7D9F

Deuteranopia (green-blind)

#60729D

Tritanopia (blue-blind)

#008889

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #337f9d;
/* rgb */ color: rgb(51, 127, 157);
/* oklch */ color: oklch(56.2% 0.087 227.5);

Tailwind

colors: {
  custom: {
    50: '#77a4ba',
    500: '#337f9d',
    950: '#000000',
  },
}

SCSS

$custom: #337f9d;
$custom-light: #77a4ba;
$custom-dark: #000000;

JSON

{
  "hex": "#337f9d",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 157
  },
  "hsl": {
    "h": 196.981,
    "s": 50.962,
    "l": 40.784
  },
  "oklch": {
    "l": 0.56226,
    "c": 0.08698,
    "h": 227.5
  },
  "luminance": 0.18317
}

Semantic roles & 50–950 ramp

primary

#337F9D

secondary

#BB8670

accent

#754DDA

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A0F11

muted

#7C7F80

Preview Lab

Preview with #337F9D

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

Preview Lab → · Contrast checker → · Palette generator →