#337AFF#337AFF

#337AFF is a mid, highly saturated blue. Relative luminance 0.218; OKLCH L 61.1% C 0.211 H 261.5°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#337AFF
RGB	rgb(51, 122, 255)
HSL	hsl(219, 100%, 60%)
HSV	hsv(219, 80%, 100%)
CMYK	cmyk(80%, 52.2%, 0%, 0%)
CIE-LAB	lab(53.86, 24.99, -72.27)
CIE-LCH	lch(53.86, 76.47, 289.08°)
OKLab	oklab(61.07% -0.0312 -0.2084)
OKLCH	oklch(61.07% 0.211 261.5)
XYZ	xyz(26.3682, 21.8397, 97.4141)
Luminance	0.2184 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337AFF #FFB833

analogous

#33E0FF #337AFF #5233FF

triadic

#337AFF #FF337A #7AFF33

tetradic

#337AFF #FF33E0 #FFB833 #33FF52

square

#337AFF #FF33E0 #FFB833 #33FF52

split-complementary

#337AFF #FF5233 #E0FF33

monochromatic

#0040B8 #0055F5 #337AFF #70A2FF #ADCAFF

Accessibility & contrast

On white

3.91

#337AFF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#337AFF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337AFF

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337AFF	#FFFFFF	#000000	##000000
##337AFF	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#108AFF

Deuteranopia (green-blind)

#0078FC

Tritanopia (blue-blind)

#009BB1

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #337aff;
/* rgb */ color: rgb(51, 122, 255);
/* oklch */ color: oklch(61.1% 0.211 261.5);

Tailwind

colors: {
  custom: {
    50: '#8a9fff',
    500: '#337aff',
    950: '#000000',
  },
}

SCSS

$custom: #337aff;
$custom-light: #8a9fff;
$custom-dark: #000000;

JSON

{
  "hex": "#337aff",
  "rgb": {
    "r": 51,
    "g": 122,
    "b": 255
  },
  "hsl": {
    "h": 219.118,
    "s": 100,
    "l": 60
  },
  "oklch": {
    "l": 0.61073,
    "c": 0.21073,
    "h": 261.5
  },
  "luminance": 0.21843
}

Semantic roles & 50–950 ramp

primary

#337AFF

secondary

#EED3A0

accent

#B429FF

background

#F9F9FF

surface

#F2F2FF

border

#CCCCD7

text

#0E0E18

muted

#7E7E86

Preview Lab

Preview with #337AFF

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

Preview Lab → · Contrast checker → · Palette generator →