#337B9B#337B9B

#337B9B is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.1% C 0.087 H 230.4°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#337B9B
RGB	rgb(51, 123, 155)
HSL	hsl(198, 50%, 40%)
HSV	hsv(198, 67%, 61%)
CMYK	cmyk(67.1%, 20.6%, 0%, 39.2%)
CIE-LAB	lab(48.55, -11.94, -23.82)
CIE-LCH	lch(48.55, 26.64, 243.38°)
OKLab	oklab(55.14% -0.0551 -0.0667)
OKLCH	oklch(55.14% 0.087 230.4)
XYZ	xyz(14.3623, 17.2348, 33.5737)
Luminance	0.1724 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337B9B #9B5333

analogous

#339B87 #337B9B #33479B

triadic

#337B9B #9B337B #7B9B33

tetradic

#337B9B #87339B #9B5333 #479B33

square

#337B9B #87339B #9B5333 #479B33

split-complementary

#337B9B #9B3347 #9B8733

monochromatic

#15323F #24566D #337B9B #489DC3 #76B6D2

Accessibility & contrast

On white

4.72

#337B9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#337B9B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337B9B

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337B9B	#FFFFFF	#000000	##FFFFFF
##337B9B	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B799D

Deuteranopia (green-blind)

#5C6F9B

Tritanopia (blue-blind)

#008486

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #337b9b;
/* rgb */ color: rgb(51, 123, 155);
/* oklch */ color: oklch(55.1% 0.087 230.4);

Tailwind

colors: {
  custom: {
    50: '#77a1b8',
    500: '#337b9b',
    950: '#000000',
  },
}

SCSS

$custom: #337b9b;
$custom-light: #77a1b8;
$custom-dark: #000000;

JSON

{
  "hex": "#337b9b",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 155
  },
  "hsl": {
    "h": 198.462,
    "s": 50.485,
    "l": 40.392
  },
  "oklch": {
    "l": 0.55143,
    "c": 0.08653,
    "h": 230.4
  },
  "luminance": 0.17236
}

Semantic roles & 50–950 ramp

primary

#337B9B

secondary

#BA866F

accent

#794EDA

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#090E11

muted

#7B7E80

Preview Lab

Preview with #337B9B

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

Preview Lab → · Contrast checker → · Palette generator →