#333FB0#333FB0

#333FB0 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.3% C 0.178 H 271.9°. Best body text is #FFFFFF at 8.47:1 contrast (WCAG AA passes).

Color values

HEX	#333FB0
RGB	rgb(51, 63, 176)
HSL	hsl(234, 55%, 45%)
HSV	hsv(234, 71%, 69%)
CMYK	cmyk(71%, 64.2%, 0%, 31%)
CIE-LAB	lab(32.68, 33.65, -61.55)
CIE-LCH	lch(32.68, 70.15, 298.66°)
OKLab	oklab(43.32% 0.0059 -0.1778)
OKLCH	oklch(43.32% 0.178 271.9)
XYZ	xyz(10.9766, 7.3923, 41.9143)
Luminance	0.0739 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.71

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#333FB0 #B0A433

analogous

#337EB0 #333FB0 #6633B0

triadic

#333FB0 #B0333F #3FB033

tetradic

#333FB0 #B0337E #B0A433 #33B066

square

#333FB0 #B0337E #B0A433 #33B066

split-complementary

#333FB0 #B06633 #7EB033

monochromatic

#181D51 #252E81 #333FB0 #535FCD #828BDB

Accessibility & contrast

On white

8.47

#333FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#333FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #333FB0

8.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##333FB0	#FFFFFF	#000000	##FFFFFF
##333FB0	1.00	8.47	2.48	8.47
#FFFFFF	8.47	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B4

Deuteranopia (green-blind)

#0047AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #333fb0;
/* rgb */ color: rgb(51, 63, 176);
/* oklch */ color: oklch(43.3% 0.178 271.9);

Tailwind

colors: {
  custom: {
    50: '#7c74c9',
    500: '#333fb0',
    950: '#000000',
  },
}

SCSS

$custom: #333fb0;
$custom-light: #7c74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#333fb0",
  "rgb": {
    "r": 51,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 234.24,
    "s": 55.066,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43318,
    "c": 0.17787,
    "h": 271.9
  },
  "luminance": 0.07393
}

Semantic roles & 50–950 ramp

primary

#333FB0

secondary

#C4BD7B

accent

#D049DE

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #333FB0

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

Preview Lab → · Contrast checker → · Palette generator →