#337E9B#337E9B

#337E9B is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 55.9% C 0.086 H 227.0°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#337E9B
RGB	rgb(51, 126, 155)
HSL	hsl(197, 50%, 40%)
HSV	hsv(197, 67%, 61%)
CMYK	cmyk(67.1%, 18.7%, 0%, 39.2%)
CIE-LAB	lab(49.48, -13.63, -22.38)
CIE-LCH	lch(49.48, 26.20, 238.66°)
OKLab	oklab(55.89% -0.0584 -0.0626)
OKLCH	oklch(55.89% 0.086 227)
XYZ	xyz(14.7401, 17.9905, 33.6997)
Luminance	0.1799 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337E9B #9B5033

analogous

#339B84 #337E9B #334A9B

triadic

#337E9B #9B337E #7E9B33

tetradic

#337E9B #84339B #9B5033 #4A9B33

square

#337E9B #84339B #9B5033 #4A9B33

split-complementary

#337E9B #9B334A #9B8433

monochromatic

#15333F #24596D #337E9B #48A1C3 #76B8D2

Accessibility & contrast

On white

4.57

#337E9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#337E9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337E9B

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337E9B	#FFFFFF	#000000	##000000
##337E9B	1.00	4.57	4.60	4.60
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F7C9C

Deuteranopia (green-blind)

#60719B

Tritanopia (blue-blind)

#008687

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337e9b;
/* rgb */ color: rgb(51, 126, 155);
/* oklch */ color: oklch(55.9% 0.086 227.0);

Tailwind

colors: {
  custom: {
    50: '#77a3b8',
    500: '#337e9b',
    950: '#000000',
  },
}

SCSS

$custom: #337e9b;
$custom-light: #77a3b8;
$custom-dark: #000000;

JSON

{
  "hex": "#337e9b",
  "rgb": {
    "r": 51,
    "g": 126,
    "b": 155
  },
  "hsl": {
    "h": 196.731,
    "s": 50.485,
    "l": 40.392
  },
  "oklch": {
    "l": 0.55886,
    "c": 0.08559,
    "h": 227
  },
  "luminance": 0.17992
}

Semantic roles & 50–950 ramp

primary

#337E9B

secondary

#BA846F

accent

#754EDA

background

#F7FAFB

surface

#EEF3F6

border

#C9CDD0

text

#0A0F11

muted

#7C7F80

Preview Lab

Preview with #337E9B

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

Preview Lab → · Contrast checker → · Palette generator →