#3131BB#3131BB

#3131BB is a dark, highly saturated blue. Relative luminance 0.064; OKLCH L 42.0% C 0.208 H 272.9°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#3131BB
RGB	rgb(49, 49, 187)
HSL	hsl(240, 58%, 46%)
HSV	hsv(240, 74%, 73%)
CMYK	cmyk(73.8%, 73.8%, 0%, 26.7%)
CIE-LAB	lab(30.49, 45.71, -71.69)
CIE-LCH	lch(30.49, 85.02, 302.52°)
OKLab	oklab(42.02% 0.0106 -0.2074)
OKLCH	oklch(42.02% 0.208 272.9)
XYZ	xyz(11.3316, 6.4363, 47.6492)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.76

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3131BB #BBBB31

analogous

#3176BB #3131BB #7631BB

triadic

#3131BB #BB3131 #31BB31

tetradic

#3131BB #BB3176 #BBBB31 #31BB76

square

#3131BB #BB3176 #BBBB31 #31BB76

split-complementary

#3131BB #BB7631 #76BB31

monochromatic

#18185A #24248B #3131BB #5656D3 #8787E0

Accessibility & contrast

On white

9.18

#3131BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#3131BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131BB

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131BB	#FFFFFF	#000000	##FFFFFF
##3131BB	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBF

Deuteranopia (green-blind)

#0041B9

Tritanopia (blue-blind)

#005973

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3131bb;
/* rgb */ color: rgb(49, 49, 187);
/* oklch */ color: oklch(42.0% 0.208 272.9);

Tailwind

colors: {
  custom: {
    50: '#7f6bd1',
    500: '#3131bb',
    950: '#000000',
  },
}

SCSS

$custom: #3131bb;
$custom-light: #7f6bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3131bb",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 187
  },
  "hsl": {
    "h": 240,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42016,
    "c": 0.20772,
    "h": 272.9
  },
  "luminance": 0.06437
}

Semantic roles & 50–950 ramp

primary

#3131BB

secondary

#C9C97F

accent

#E246E2

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3131BB

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

Preview Lab → · Contrast checker → · Palette generator →