#333FB1#333FB1

#333FB1 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.179 H 271.9°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#333FB1
RGB	rgb(51, 63, 177)
HSL	hsl(234, 55%, 45%)
HSV	hsv(234, 71%, 69%)
CMYK	cmyk(71.2%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(32.77, 34.00, -62.00)
CIE-LCH	lch(32.77, 70.71, 298.74°)
OKLab	oklab(43.41% 0.0058 -0.1791)
OKLCH	oklch(43.41% 0.179 271.9)
XYZ	xyz(11.0759, 7.4321, 42.4373)
Luminance	0.0743 (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

#333FB1 #B1A533

analogous

#337EB1 #333FB1 #6633B1

triadic

#333FB1 #B1333F #3FB133

tetradic

#333FB1 #B1337E #B1A533 #33B166

square

#333FB1 #B1337E #B1A533 #33B166

split-complementary

#333FB1 #B16633 #7EB133

monochromatic

#181D52 #252E81 #333FB1 #545FCE #838CDB

Accessibility & contrast

On white

8.45

#333FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#333FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #333FB1

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##333FB1	#FFFFFF	#000000	##FFFFFF
##333FB1	1.00	8.45	2.49	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #333fb1;
/* rgb */ color: rgb(51, 63, 177);
/* oklch */ color: oklch(43.4% 0.179 271.9);

Tailwind

colors: {
  custom: {
    50: '#7c74c9',
    500: '#333fb1',
    950: '#000000',
  },
}

SCSS

$custom: #333fb1;
$custom-light: #7c74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#333fb1",
  "rgb": {
    "r": 51,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 234.286,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.43409,
    "c": 0.17918,
    "h": 271.9
  },
  "luminance": 0.07433
}

Semantic roles & 50–950 ramp

primary

#333FB1

secondary

#C5BE7B

accent

#D049DF

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #333FB1

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

Preview Lab → · Contrast checker → · Palette generator →