#333FB5#333FB5

#333FB5 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.8% C 0.184 H 271.7°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#333FB5
RGB	rgb(51, 63, 181)
HSL	hsl(234, 56%, 45%)
HSV	hsv(234, 72%, 71%)
CMYK	cmyk(71.8%, 65.2%, 0%, 29%)
CIE-LAB	lab(33.12, 35.42, -63.80)
CIE-LCH	lch(33.12, 72.98, 299.04°)
OKLab	oklab(43.77% 0.0056 -0.1844)
OKLCH	oklch(43.77% 0.184 271.7)
XYZ	xyz(11.4804, 7.5939, 44.5678)
Luminance	0.0760 (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

#333FB5 #B5A933

analogous

#3380B5 #333FB5 #6833B5

triadic

#333FB5 #B5333F #3FB533

tetradic

#333FB5 #B53380 #B5A933 #33B568

square

#333FB5 #B53380 #B5A933 #33B568

split-complementary

#333FB5 #B56833 #80B533

monochromatic

#181E56 #262E85 #333FB5 #5661CF #868EDD

Accessibility & contrast

On white

8.34

#333FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#333FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #333FB5

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##333FB5	#FFFFFF	#000000	##FFFFFF
##333FB5	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #333fb5;
/* rgb */ color: rgb(51, 63, 181);
/* oklch */ color: oklch(43.8% 0.184 271.7);

Tailwind

colors: {
  custom: {
    50: '#7d74cc',
    500: '#333fb5',
    950: '#000000',
  },
}

SCSS

$custom: #333fb5;
$custom-light: #7d74cc;
$custom-dark: #000000;

JSON

{
  "hex": "#333fb5",
  "rgb": {
    "r": 51,
    "g": 63,
    "b": 181
  },
  "hsl": {
    "h": 234.462,
    "s": 56.034,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43774,
    "c": 0.18444,
    "h": 271.7
  },
  "luminance": 0.07595
}

Semantic roles & 50–950 ramp

primary

#333FB5

secondary

#C6C07D

accent

#D148DF

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #333FB5

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

Preview Lab → · Contrast checker → · Palette generator →