#3337BB#3337BB

#3337BB is a dark, highly saturated blue. Relative luminance 0.070; OKLCH L 43.0% C 0.201 H 272.8°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#3337BB
RGB	rgb(51, 55, 187)
HSL	hsl(238, 57%, 47%)
HSV	hsv(238, 73%, 73%)
CMYK	cmyk(72.7%, 70.6%, 0%, 26.7%)
CIE-LAB	lab(31.86, 42.42, -69.43)
CIE-LCH	lch(31.86, 81.36, 301.43°)
OKLab	oklab(43.03% 0.0098 -0.2008)
OKLCH	oklch(43.03% 0.201 272.8)
XYZ	xyz(11.6981, 7.0229, 47.7431)
Luminance	0.0702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3337BB #BBB733

analogous

#337BBB #3337BB #7333BB

triadic

#3337BB #BB3337 #37BB33

tetradic

#3337BB #BB337B #BBB733 #33BB73

square

#3337BB #BB337B #BBB733 #33BB73

split-complementary

#3337BB #BB7333 #7BBB33

monochromatic

#191B5B #26298B #3337BB #595DD2 #898CDF

Accessibility & contrast

On white

8.73

#3337BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3337BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3337BB

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3337BB	#FFFFFF	#000000	##FFFFFF
##3337BB	1.00	8.73	2.40	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BF

Deuteranopia (green-blind)

#0044B9

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3337bb;
/* rgb */ color: rgb(51, 55, 187);
/* oklch */ color: oklch(43.0% 0.201 272.8);

Tailwind

colors: {
  custom: {
    50: '#7f6fd1',
    500: '#3337bb',
    950: '#000000',
  },
}

SCSS

$custom: #3337bb;
$custom-light: #7f6fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3337bb",
  "rgb": {
    "r": 51,
    "g": 55,
    "b": 187
  },
  "hsl": {
    "h": 238.235,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43028,
    "c": 0.20106,
    "h": 272.8
  },
  "luminance": 0.07024
}

Semantic roles & 50–950 ramp

primary

#3337BB

secondary

#C9C781

accent

#DC47E0

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3337BB

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

Preview Lab → · Contrast checker → · Palette generator →