#333FA3#333FA3

#333FA3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.160 H 272.3°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#333FA3
RGB	rgb(51, 63, 163)
HSL	hsl(234, 52%, 42%)
HSV	hsv(234, 69%, 64%)
CMYK	cmyk(68.7%, 61.3%, 0%, 36.1%)
CIE-LAB	lab(31.58, 28.97, -55.56)
CIE-LCH	lch(31.58, 62.66, 297.54°)
OKLab	oklab(42.17% 0.0064 -0.1602)
OKLCH	oklch(42.17% 0.16 272.3)
XYZ	xyz(9.7514, 6.9023, 35.4616)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#333FA3 #A39733

analogous

#3377A3 #333FA3 #5F33A3

triadic

#333FA3 #A3333F #3FA333

tetradic

#333FA3 #A33377 #A39733 #33A35F

square

#333FA3 #A33377 #A39733 #33A35F

split-complementary

#333FA3 #A35F33 #77A333

monochromatic

#161B46 #242D74 #333FA3 #4C59C7 #7B85D6

Accessibility & contrast

On white

8.82

#333FA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#333FA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #333FA3

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##333FA3	#FFFFFF	#000000	##FFFFFF
##333FA3	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A6

Deuteranopia (green-blind)

#0045A1

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #333fa3;
/* rgb */ color: rgb(51, 63, 163);
/* oklch */ color: oklch(42.2% 0.160 272.3);

Tailwind

colors: {
  custom: {
    50: '#7974bf',
    500: '#333fa3',
    950: '#000000',
  },
}

SCSS

$custom: #333fa3;
$custom-light: #7974bf;
$custom-dark: #000000;

JSON

{
  "hex": "#333fa3",
  "rgb": {
    "r": 51,
    "g": 63,
    "b": 163
  },
  "hsl": {
    "h": 233.571,
    "s": 52.336,
    "l": 41.961
  },
  "oklch": {
    "l": 0.42166,
    "c": 0.16033,
    "h": 272.3
  },
  "luminance": 0.06903
}

Semantic roles & 50–950 ramp

primary

#333FA3

secondary

#BEB673

accent

#CC4CDC

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #333FA3

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

Preview Lab → · Contrast checker → · Palette generator →