#337DA1#337DA1

#337DA1 is a mid, moderate cyan. Relative luminance 0.179; OKLCH L 55.9% C 0.091 H 232.9°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#337DA1
RGB	rgb(51, 125, 161)
HSL	hsl(200, 52%, 42%)
HSV	hsv(200, 68%, 63%)
CMYK	cmyk(68.3%, 22.4%, 0%, 36.9%)
CIE-LAB	lab(49.43, -11.03, -25.97)
CIE-LCH	lch(49.43, 28.22, 246.98°)
OKLab	oklab(55.92% -0.0551 -0.0729)
OKLCH	oklch(55.92% 0.091 232.9)
XYZ	xyz(15.1293, 17.9426, 36.3772)
Luminance	0.1794 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337DA1 #A15733

analogous

#33A18E #337DA1 #3346A1

triadic

#337DA1 #A1337D #7DA133

tetradic

#337DA1 #8E33A1 #A15733 #46A133

square

#337DA1 #8E33A1 #A15733 #46A133

split-complementary

#337DA1 #A13346 #A18E33

monochromatic

#163544 #245973 #337DA1 #4B9EC6 #7AB7D5

Accessibility & contrast

On white

4.58

#337DA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#337DA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337DA1

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337DA1	#FFFFFF	#000000	##000000
##337DA1	1.00	4.58	4.59	4.59
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B7CA3

Deuteranopia (green-blind)

#5C71A0

Tritanopia (blue-blind)

#008789

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #337da1;
/* rgb */ color: rgb(51, 125, 161);
/* oklch */ color: oklch(55.9% 0.091 232.9);

Tailwind

colors: {
  custom: {
    50: '#78a2bd',
    500: '#337da1',
    950: '#000000',
  },
}

SCSS

$custom: #337da1;
$custom-light: #78a2bd;
$custom-dark: #000000;

JSON

{
  "hex": "#337da1",
  "rgb": {
    "r": 51,
    "g": 125,
    "b": 161
  },
  "hsl": {
    "h": 199.636,
    "s": 51.887,
    "l": 41.569
  },
  "oklch": {
    "l": 0.55922,
    "c": 0.09133,
    "h": 232.9
  },
  "luminance": 0.17944
}

Semantic roles & 50–950 ramp

primary

#337DA1

secondary

#BD8B72

accent

#7B4CDB

background

#F7F9FB

surface

#EEF2F6

border

#C9CCD0

text

#0A0F12

muted

#7C7E81

Preview Lab

Preview with #337DA1

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

Preview Lab → · Contrast checker → · Palette generator →