#3131AF#3131AF

#3131AF is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.8% C 0.193 H 273.8°. Best body text is #FFFFFF at 9.59:1 contrast (WCAG AA passes).

Color values

HEX	#3131AF
RGB	rgb(49, 49, 175)
HSL	hsl(240, 56%, 44%)
HSV	hsv(240, 72%, 69%)
CMYK	cmyk(72%, 72%, 0%, 31.4%)
CIE-LAB	lab(29.27, 41.70, -66.56)
CIE-LCH	lch(29.27, 78.55, 302.07°)
OKLab	oklab(40.78% 0.0126 -0.1925)
OKLCH	oklch(40.78% 0.193 273.8)
XYZ	xyz(10.1002, 5.9437, 41.1641)
Luminance	0.0595 (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

#3131AF #AFAF31

analogous

#3170AF #3131AF #7031AF

triadic

#3131AF #AF3131 #31AF31

tetradic

#3131AF #AF3170 #AFAF31 #31AF70

square

#3131AF #AF3170 #AFAF31 #31AF70

split-complementary

#3131AF #AF7031 #70AF31

monochromatic

#16164F #24247F #3131AF #4F4FCE #7F7FDB

Accessibility & contrast

On white

9.59

#3131AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#3131AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131AF

9.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131AF	#FFFFFF	#000000	##FFFFFF
##3131AF	1.00	9.59	2.19	9.59
#FFFFFF	9.59	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB3

Deuteranopia (green-blind)

#003FAD

Tritanopia (blue-blind)

#00546D

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3131af;
/* rgb */ color: rgb(49, 49, 175);
/* oklch */ color: oklch(40.8% 0.193 273.8);

Tailwind

colors: {
  custom: {
    50: '#7c6ac8',
    500: '#3131af',
    950: '#000000',
  },
}

SCSS

$custom: #3131af;
$custom-light: #7c6ac8;
$custom-dark: #000000;

JSON

{
  "hex": "#3131af",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 175
  },
  "hsl": {
    "h": 240,
    "s": 56.25,
    "l": 43.922
  },
  "oklch": {
    "l": 0.40784,
    "c": 0.19291,
    "h": 273.8
  },
  "luminance": 0.05945
}

Semantic roles & 50–950 ramp

primary

#3131AF

secondary

#C4C478

accent

#E048E0

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3131AF

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

Preview Lab → · Contrast checker → · Palette generator →