#337EEB#337EEB

#337EEB is a mid, vivid blue. Relative luminance 0.216; OKLCH L 60.5% C 0.181 H 258.3°. Best body text is #000000 at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#337EEB
RGB	rgb(51, 126, 235)
HSL	hsl(216, 82%, 56%)
HSV	hsv(216, 78%, 92%)
CMYK	cmyk(78.3%, 46.4%, 0%, 7.8%)
CIE-LAB	lab(53.62, 15.12, -61.55)
CIE-LCH	lch(53.62, 63.38, 283.80°)
OKLab	oklab(60.48% -0.0367 -0.1768)
OKLCH	oklch(60.48% 0.181 258.3)
XYZ	xyz(23.8160, 21.6208, 81.4992)
Luminance	0.2162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#337EEB #EBA033

analogous

#33DAEB #337EEB #4433EB

triadic

#337EEB #EB337E #7EEB33

tetradic

#337EEB #EB33DA #EBA033 #33EB44

square

#337EEB #EB33DA #EBA033 #33EB44

split-complementary

#337EEB #EB4433 #DAEB33

monochromatic

#0F4595 #145FCD #337EEB #6BA1F0 #A2C4F6

Accessibility & contrast

On white

3.94

#337EEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.32

#337EEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #337EEB

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##337EEB	#FFFFFF	#000000	##000000
##337EEB	1.00	3.94	5.32	5.32
#FFFFFF	3.94	1.00	21.00	21.00
#000000	5.32	21.00	1.00	1.00
##000000	5.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4289EF

Deuteranopia (green-blind)

#0878E9

Tritanopia (blue-blind)

#0098A9

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #337eeb;
/* rgb */ color: rgb(51, 126, 235);
/* oklch */ color: oklch(60.5% 0.181 258.3);

Tailwind

colors: {
  custom: {
    50: '#85a2f2',
    500: '#337eeb',
    950: '#000000',
  },
}

SCSS

$custom: #337eeb;
$custom-light: #85a2f2;
$custom-dark: #000000;

JSON

{
  "hex": "#337eeb",
  "rgb": {
    "r": 51,
    "g": 126,
    "b": 235
  },
  "hsl": {
    "h": 215.543,
    "s": 82.143,
    "l": 56.078
  },
  "oklch": {
    "l": 0.60478,
    "c": 0.18055,
    "h": 258.3
  },
  "luminance": 0.21624
}

Semantic roles & 50–950 ramp

primary

#337EEB

secondary

#E3C497

accent

#A62FF8

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0F17

muted

#7E7E85

Preview Lab

Preview with #337EEB

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

Preview Lab → · Contrast checker → · Palette generator →