#333FB3#333FB3

#333FB3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.182 H 271.8°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#333FB3
RGB	rgb(51, 63, 179)
HSL	hsl(234, 56%, 45%)
HSV	hsv(234, 72%, 70%)
CMYK	cmyk(71.5%, 64.8%, 0%, 29.8%)
CIE-LAB	lab(32.95, 34.71, -62.91)
CIE-LCH	lch(32.95, 71.85, 298.89°)
OKLab	oklab(43.59% 0.0057 -0.1817)
OKLCH	oklch(43.59% 0.182 271.8)
XYZ	xyz(11.2767, 7.5124, 43.4948)
Luminance	0.0751 (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

#333FB3 #B3A733

analogous

#337FB3 #333FB3 #6733B3

triadic

#333FB3 #B3333F #3FB333

tetradic

#333FB3 #B3337F #B3A733 #33B367

square

#333FB3 #B3337F #B3A733 #33B367

split-complementary

#333FB3 #B36733 #7FB333

monochromatic

#181D54 #252E83 #333FB3 #5560CE #848DDC

Accessibility & contrast

On white

8.39

#333FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#333FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #333FB3

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##333FB3	#FFFFFF	#000000	##FFFFFF
##333FB3	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #333fb3;
/* rgb */ color: rgb(51, 63, 179);
/* oklch */ color: oklch(43.6% 0.182 271.8);

Tailwind

colors: {
  custom: {
    50: '#7d74cb',
    500: '#333fb3',
    950: '#000000',
  },
}

SCSS

$custom: #333fb3;
$custom-light: #7d74cb;
$custom-dark: #000000;

JSON

{
  "hex": "#333fb3",
  "rgb": {
    "r": 51,
    "g": 63,
    "b": 179
  },
  "hsl": {
    "h": 234.375,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43591,
    "c": 0.18183,
    "h": 271.8
  },
  "luminance": 0.07513
}

Semantic roles & 50–950 ramp

primary

#333FB3

secondary

#C6BF7C

accent

#D149DF

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #333FB3

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

Preview Lab → · Contrast checker → · Palette generator →