#337EA1#337EA1

#337EA1 is a mid, moderate cyan. Relative luminance 0.182; OKLCH L 56.2% C 0.091 H 231.9°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#337EA1
RGB	rgb(51, 126, 161)
HSL	hsl(199, 52%, 42%)
HSV	hsv(199, 68%, 63%)
CMYK	cmyk(68.3%, 21.7%, 0%, 36.9%)
CIE-LAB	lab(49.73, -11.60, -25.50)
CIE-LCH	lch(49.73, 28.01, 245.53°)
OKLab	oklab(56.17% -0.0561 -0.0715)
OKLCH	oklch(56.17% 0.091 231.9)
XYZ	xyz(15.2566, 18.1971, 36.4196)
Luminance	0.1820 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337EA1 #A15633

analogous

#33A18D #337EA1 #3347A1

triadic

#337EA1 #A1337E #7EA133

tetradic

#337EA1 #8D33A1 #A15633 #47A133

square

#337EA1 #8D33A1 #A15633 #47A133

split-complementary

#337EA1 #A13347 #A18D33

monochromatic

#163544 #245A73 #337EA1 #4B9FC6 #7AB8D5

Accessibility & contrast

On white

4.53

#337EA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#337EA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337EA1

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337EA1	#FFFFFF	#000000	##000000
##337EA1	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D7CA3

Deuteranopia (green-blind)

#5D71A0

Tritanopia (blue-blind)

#00878A

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #337ea1;
/* rgb */ color: rgb(51, 126, 161);
/* oklch */ color: oklch(56.2% 0.091 231.9);

Tailwind

colors: {
  custom: {
    50: '#78a3bd',
    500: '#337ea1',
    950: '#000000',
  },
}

SCSS

$custom: #337ea1;
$custom-light: #78a3bd;
$custom-dark: #000000;

JSON

{
  "hex": "#337ea1",
  "rgb": {
    "r": 51,
    "g": 126,
    "b": 161
  },
  "hsl": {
    "h": 199.091,
    "s": 51.887,
    "l": 41.569
  },
  "oklch": {
    "l": 0.56167,
    "c": 0.09089,
    "h": 231.9
  },
  "luminance": 0.18199
}

Semantic roles & 50–950 ramp

primary

#337EA1

secondary

#BD8A72

accent

#7A4CDB

background

#F7FAFB

surface

#EEF3F6

border

#C9CDD0

text

#0A0F12

muted

#7C7F81

Preview Lab

Preview with #337EA1

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

Preview Lab → · Contrast checker → · Palette generator →