#337FD1#337FD1

#337FD1 is a mid, vivid cyan. Relative luminance 0.205; OKLCH L 59.0% C 0.146 H 253.0°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#337FD1
RGB	rgb(51, 127, 209)
HSL	hsl(211, 63%, 51%)
HSV	hsv(211, 76%, 82%)
CMYK	cmyk(75.6%, 39.2%, 0%, 18%)
CIE-LAB	lab(52.38, 4.91, -48.92)
CIE-LCH	lch(52.38, 49.17, 275.73°)
OKLab	oklab(59.02% -0.0426 -0.1396)
OKLCH	oklch(59.02% 0.146 253)
XYZ	xyz(20.4589, 20.4836, 63.1847)
Luminance	0.2049 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337FD1 #D18533

analogous

#33CED1 #337FD1 #3633D1

triadic

#337FD1 #D1337F #7FD133

tetradic

#337FD1 #D133CE #D18533 #33D136

square

#337FD1 #D133CE #D18533 #33D136

split-complementary

#337FD1 #D13633 #CED133

monochromatic

#194370 #2561A2 #337FD1 #659EDC #97BEE8

Accessibility & contrast

On white

4.12

#337FD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#337FD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337FD1

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337FD1	#FFFFFF	#000000	##000000
##337FD1	1.00	4.12	5.10	5.10
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5885D4

Deuteranopia (green-blind)

#3F76CF

Tritanopia (blue-blind)

#00929E

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #337fd1;
/* rgb */ color: rgb(51, 127, 209);
/* oklch */ color: oklch(59.0% 0.146 253.0);

Tailwind

colors: {
  custom: {
    50: '#80a3df',
    500: '#337fd1',
    950: '#000000',
  },
}

SCSS

$custom: #337fd1;
$custom-light: #80a3df;
$custom-dark: #000000;

JSON

{
  "hex": "#337fd1",
  "rgb": {
    "r": 51,
    "g": 127,
    "b": 209
  },
  "hsl": {
    "h": 211.139,
    "s": 63.2,
    "l": 50.98
  },
  "oklch": {
    "l": 0.59022,
    "c": 0.14601,
    "h": 253
  },
  "luminance": 0.20486
}

Semantic roles & 50–950 ramp

primary

#337FD1

secondary

#D3B18D

accent

#9742E6

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #337FD1

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

Preview Lab → · Contrast checker → · Palette generator →