#337B9C#337B9C

#337B9C is a mid, moderate cyan. Relative luminance 0.173; OKLCH L 55.2% C 0.087 H 231.2°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#337B9C
RGB	rgb(51, 123, 156)
HSL	hsl(199, 51%, 41%)
HSV	hsv(199, 67%, 61%)
CMYK	cmyk(67.3%, 21.2%, 0%, 38.8%)
CIE-LAB	lab(48.60, -11.60, -24.34)
CIE-LCH	lch(48.60, 26.96, 244.52°)
OKLab	oklab(55.19% -0.0548 -0.0682)
OKLCH	oklch(55.19% 0.087 231.2)
XYZ	xyz(14.4466, 17.2685, 34.0178)
Luminance	0.1727 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337B9C #9C5433

analogous

#339C88 #337B9C #33469C

triadic

#337B9C #9C337B #7B9C33

tetradic

#337B9C #88339C #9C5433 #469C33

square

#337B9C #88339C #9C5433 #469C33

split-complementary

#337B9C #9C3346 #9C8833

monochromatic

#153240 #24576E #337B9C #499DC3 #77B6D3

Accessibility & contrast

On white

4.71

#337B9C on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#337B9C on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337B9C

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337B9C	#FFFFFF	#000000	##FFFFFF
##337B9C	1.00	4.71	4.45	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A799E

Deuteranopia (green-blind)

#5C6F9C

Tritanopia (blue-blind)

#008486

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #337b9c;
/* rgb */ color: rgb(51, 123, 156);
/* oklch */ color: oklch(55.2% 0.087 231.2);

Tailwind

colors: {
  custom: {
    50: '#77a1b9',
    500: '#337b9c',
    950: '#000000',
  },
}

SCSS

$custom: #337b9c;
$custom-light: #77a1b9;
$custom-dark: #000000;

JSON

{
  "hex": "#337b9c",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 156
  },
  "hsl": {
    "h": 198.857,
    "s": 50.725,
    "l": 40.588
  },
  "oklch": {
    "l": 0.55191,
    "c": 0.08745,
    "h": 231.2
  },
  "luminance": 0.1727
}

Semantic roles & 50–950 ramp

primary

#337B9C

secondary

#BB8770

accent

#7A4EDA

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E11

muted

#7C7E80

Preview Lab

Preview with #337B9C

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

Preview Lab → · Contrast checker → · Palette generator →