#337CA1#337CA1

#337CA1 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.7% C 0.092 H 234.0°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#337CA1
RGB	rgb(51, 124, 161)
HSL	hsl(200, 52%, 42%)
HSV	hsv(200, 68%, 63%)
CMYK	cmyk(68.3%, 23%, 0%, 36.9%)
CIE-LAB	lab(49.12, -10.46, -26.45)
CIE-LCH	lch(49.12, 28.44, 248.42°)
OKLab	oklab(55.68% -0.054 -0.0742)
OKLCH	oklch(55.68% 0.092 234)
XYZ	xyz(15.0034, 17.6907, 36.3352)
Luminance	0.1769 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337CA1 #A15833

analogous

#33A18F #337CA1 #3345A1

triadic

#337CA1 #A1337C #7CA133

tetradic

#337CA1 #8F33A1 #A15833 #45A133

square

#337CA1 #8F33A1 #A15833 #45A133

split-complementary

#337CA1 #A13345 #A18F33

monochromatic

#163444 #245873 #337CA1 #4B9DC6 #7AB6D5

Accessibility & contrast

On white

4.63

#337CA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#337CA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #337CA1

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337CA1	#FFFFFF	#000000	##FFFFFF
##337CA1	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A7BA3

Deuteranopia (green-blind)

#5B70A0

Tritanopia (blue-blind)

#008688

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #337ca1;
/* rgb */ color: rgb(51, 124, 161);
/* oklch */ color: oklch(55.7% 0.092 234.0);

Tailwind

colors: {
  custom: {
    50: '#78a1bd',
    500: '#337ca1',
    950: '#000000',
  },
}

SCSS

$custom: #337ca1;
$custom-light: #78a1bd;
$custom-dark: #000000;

JSON

{
  "hex": "#337ca1",
  "rgb": {
    "r": 51,
    "g": 124,
    "b": 161
  },
  "hsl": {
    "h": 200.182,
    "s": 51.887,
    "l": 41.569
  },
  "oklch": {
    "l": 0.55677,
    "c": 0.0918,
    "h": 234
  },
  "luminance": 0.17692
}

Semantic roles & 50–950 ramp

primary

#337CA1

secondary

#BD8C72

accent

#7D4CDB

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0F12

muted

#7C7E81

Preview Lab

Preview with #337CA1

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

Preview Lab → · Contrast checker → · Palette generator →