#337AA1#337AA1

#337AA1 is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.2% C 0.093 H 236.0°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#337AA1
RGB	rgb(51, 122, 161)
HSL	hsl(201, 52%, 42%)
HSV	hsv(201, 68%, 63%)
CMYK	cmyk(68.3%, 24.2%, 0%, 36.9%)
CIE-LAB	lab(48.50, -9.31, -27.40)
CIE-LCH	lch(48.50, 28.94, 251.23°)
OKLab	oklab(55.19% -0.0519 -0.077)
OKLCH	oklch(55.19% 0.093 236)
XYZ	xyz(14.7553, 17.1945, 36.2525)
Luminance	0.1720 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337AA1 #A15A33

analogous

#33A191 #337AA1 #3343A1

triadic

#337AA1 #A1337A #7AA133

tetradic

#337AA1 #9133A1 #A15A33 #43A133

square

#337AA1 #9133A1 #A15A33 #43A133

split-complementary

#337AA1 #A13343 #A19133

monochromatic

#163444 #245773 #337AA1 #4B9AC6 #7AB4D5

Accessibility & contrast

On white

4.73

#337AA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#337AA1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #337AA1

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337AA1	#FFFFFF	#000000	##FFFFFF
##337AA1	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6779A3

Deuteranopia (green-blind)

#586EA0

Tritanopia (blue-blind)

#008487

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #337aa1;
/* rgb */ color: rgb(51, 122, 161);
/* oklch */ color: oklch(55.2% 0.093 236.0);

Tailwind

colors: {
  custom: {
    50: '#78a0bd',
    500: '#337aa1',
    950: '#000000',
  },
}

SCSS

$custom: #337aa1;
$custom-light: #78a0bd;
$custom-dark: #000000;

JSON

{
  "hex": "#337aa1",
  "rgb": {
    "r": 51,
    "g": 122,
    "b": 161
  },
  "hsl": {
    "h": 201.273,
    "s": 51.887,
    "l": 41.569
  },
  "oklch": {
    "l": 0.55189,
    "c": 0.09284,
    "h": 236
  },
  "luminance": 0.17196
}

Semantic roles & 50–950 ramp

primary

#337AA1

secondary

#BD8D72

accent

#7F4CDB

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0E12

muted

#7C7E81

Preview Lab

Preview with #337AA1

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

Preview Lab → · Contrast checker → · Palette generator →