#333FB4#333FB4

#333FB4 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.183 H 271.8°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#333FB4
RGB	rgb(51, 63, 180)
HSL	hsl(234, 56%, 45%)
HSV	hsv(234, 72%, 71%)
CMYK	cmyk(71.7%, 65%, 0%, 29.4%)
CIE-LAB	lab(33.03, 35.07, -63.35)
CIE-LCH	lch(33.03, 72.41, 298.97°)
OKLab	oklab(43.68% 0.0056 -0.183)
OKLCH	oklch(43.68% 0.183 271.8)
XYZ	xyz(11.3782, 7.5530, 44.0294)
Luminance	0.0755 (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

#333FB4 #B4A833

analogous

#337FB4 #333FB4 #6833B4

triadic

#333FB4 #B4333F #3FB433

tetradic

#333FB4 #B4337F #B4A833 #33B468

square

#333FB4 #B4337F #B4A833 #33B468

split-complementary

#333FB4 #B46833 #7FB433

monochromatic

#181E55 #252E84 #333FB4 #5561CF #858DDC

Accessibility & contrast

On white

8.36

#333FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#333FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #333FB4

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##333FB4	#FFFFFF	#000000	##FFFFFF
##333FB4	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B8

Deuteranopia (green-blind)

#0048B2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #333fb4;
/* rgb */ color: rgb(51, 63, 180);
/* oklch */ color: oklch(43.7% 0.183 271.8);

Tailwind

colors: {
  custom: {
    50: '#7d74cb',
    500: '#333fb4',
    950: '#000000',
  },
}

SCSS

$custom: #333fb4;
$custom-light: #7d74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#333fb4",
  "rgb": {
    "r": 51,
    "g": 63,
    "b": 180
  },
  "hsl": {
    "h": 234.419,
    "s": 55.844,
    "l": 45.294
  },
  "oklch": {
    "l": 0.43683,
    "c": 0.18314,
    "h": 271.8
  },
  "luminance": 0.07554
}

Semantic roles & 50–950 ramp

primary

#333FB4

secondary

#C6BF7D

accent

#D149DF

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #333FB4

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

Preview Lab → · Contrast checker → · Palette generator →