#3331AB#3331AB

#3331AB is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.5% C 0.187 H 274.8°. Best body text is #FFFFFF at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#3331AB
RGB	rgb(51, 49, 171)
HSL	hsl(241, 55%, 43%)
HSV	hsv(241, 71%, 67%)
CMYK	cmyk(70.2%, 71.3%, 0%, 32.9%)
CIE-LAB	lab(29.00, 40.57, -64.60)
CIE-LCH	lch(29.00, 76.28, 302.13°)
OKLab	oklab(40.51% 0.0157 -0.1867)
OKLCH	oklch(40.51% 0.187 274.8)
XYZ	xyz(9.8118, 5.8398, 39.1303)
Luminance	0.0584 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.19

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3331AB #A9AB31

analogous

#316CAB #3331AB #7031AB

triadic

#3331AB #AB3331 #31AB33

tetradic

#3331AB #AB316C #A9AB31 #31AB70

square

#3331AB #AB316C #A9AB31 #31AB70

split-complementary

#3331AB #AB7031 #6CAB31

monochromatic

#17164C #25237B #3331AB #4F4DCC #7E7DDA

Accessibility & contrast

On white

9.69

#3331AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#3331AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3331AB

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3331AB	#FFFFFF	#000000	##FFFFFF
##3331AB	1.00	9.69	2.17	9.69
#FFFFFF	9.69	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AAF

Deuteranopia (green-blind)

#003FA9

Tritanopia (blue-blind)

#00536A

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3331ab;
/* rgb */ color: rgb(51, 49, 171);
/* oklch */ color: oklch(40.5% 0.187 274.8);

Tailwind

colors: {
  custom: {
    50: '#7c6ac5',
    500: '#3331ab',
    950: '#000000',
  },
}

SCSS

$custom: #3331ab;
$custom-light: #7c6ac5;
$custom-dark: #000000;

JSON

{
  "hex": "#3331ab",
  "rgb": {
    "r": 51,
    "g": 49,
    "b": 171
  },
  "hsl": {
    "h": 240.984,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.40509,
    "c": 0.18738,
    "h": 274.8
  },
  "luminance": 0.05841
}

Semantic roles & 50–950 ramp

primary

#3331AB

secondary

#C1C275

accent

#DF49DC

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3331AB

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

Preview Lab → · Contrast checker → · Palette generator →