#337BD1#337BD1

#337BD1 is a mid, vivid cyan. Relative luminance 0.195; OKLCH L 58.1% C 0.150 H 254.9°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#337BD1
RGB	rgb(51, 123, 209)
HSL	hsl(213, 63%, 51%)
HSV	hsv(213, 76%, 82%)
CMYK	cmyk(75.6%, 41.1%, 0%, 18%)
CIE-LAB	lab(51.23, 7.36, -50.75)
CIE-LCH	lch(51.23, 51.28, 278.25°)
OKLab	oklab(58.13% -0.0391 -0.1451)
OKLCH	oklch(58.13% 0.15 254.9)
XYZ	xyz(19.9526, 19.4709, 63.0159)
Luminance	0.1947 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337BD1 #D18933

analogous

#33CAD1 #337BD1 #3A33D1

triadic

#337BD1 #D1337B #7BD133

tetradic

#337BD1 #D133CA #D18933 #33D13A

square

#337BD1 #D133CA #D18933 #33D13A

split-complementary

#337BD1 #D13A33 #CAD133

monochromatic

#194170 #255EA2 #337BD1 #659BDC #97BCE8

Accessibility & contrast

On white

4.29

#337BD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#337BD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337BD1

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337BD1	#FFFFFF	#000000	##000000
##337BD1	1.00	4.29	4.89	4.89
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5182D4

Deuteranopia (green-blind)

#3673CF

Tritanopia (blue-blind)

#008F9C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #337bd1;
/* rgb */ color: rgb(51, 123, 209);
/* oklch */ color: oklch(58.1% 0.150 254.9);

Tailwind

colors: {
  custom: {
    50: '#80a0df',
    500: '#337bd1',
    950: '#000000',
  },
}

SCSS

$custom: #337bd1;
$custom-light: #80a0df;
$custom-dark: #000000;

JSON

{
  "hex": "#337bd1",
  "rgb": {
    "r": 51,
    "g": 123,
    "b": 209
  },
  "hsl": {
    "h": 212.658,
    "s": 63.2,
    "l": 50.98
  },
  "oklch": {
    "l": 0.5813,
    "c": 0.15027,
    "h": 254.9
  },
  "luminance": 0.19473
}

Semantic roles & 50–950 ramp

primary

#337BD1

secondary

#D3B38D

accent

#9B42E6

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #337BD1

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

Preview Lab → · Contrast checker → · Palette generator →