#3131B1#3131B1

#3131B1 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 41.0% C 0.195 H 273.6°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#3131B1
RGB	rgb(49, 49, 177)
HSL	hsl(240, 57%, 44%)
HSV	hsv(240, 72%, 69%)
CMYK	cmyk(72.3%, 72.3%, 0%, 30.6%)
CIE-LAB	lab(29.47, 42.37, -67.43)
CIE-LCH	lch(29.47, 79.64, 302.15°)
OKLab	oklab(40.99% 0.0123 -0.195)
OKLCH	oklch(40.99% 0.195 273.6)
XYZ	xyz(10.2981, 6.0229, 42.2063)
Luminance	0.0602 (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

#3131B1 #B1B131

analogous

#3171B1 #3131B1 #7131B1

triadic

#3131B1 #B13131 #31B131

tetradic

#3131B1 #B13171 #B1B131 #31B171

square

#3131B1 #B13171 #B1B131 #31B171

split-complementary

#3131B1 #B17131 #71B131

monochromatic

#161651 #242481 #3131B1 #5151CF #8080DC

Accessibility & contrast

On white

9.52

#3131B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#3131B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131B1

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131B1	#FFFFFF	#000000	##FFFFFF
##3131B1	1.00	9.52	2.20	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB5

Deuteranopia (green-blind)

#003FAF

Tritanopia (blue-blind)

#00556E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3131b1;
/* rgb */ color: rgb(49, 49, 177);
/* oklch */ color: oklch(41.0% 0.195 273.6);

Tailwind

colors: {
  custom: {
    50: '#7d6aca',
    500: '#3131b1',
    950: '#000000',
  },
}

SCSS

$custom: #3131b1;
$custom-light: #7d6aca;
$custom-dark: #000000;

JSON

{
  "hex": "#3131b1",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 177
  },
  "hsl": {
    "h": 240,
    "s": 56.637,
    "l": 44.314
  },
  "oklch": {
    "l": 0.40987,
    "c": 0.19542,
    "h": 273.6
  },
  "luminance": 0.06024
}

Semantic roles & 50–950 ramp

primary

#3131B1

secondary

#C5C579

accent

#E048E0

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3131B1

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

Preview Lab → · Contrast checker → · Palette generator →