#3131B3#3131B3

#3131B3 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 41.2% C 0.198 H 273.5°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#3131B3
RGB	rgb(49, 49, 179)
HSL	hsl(240, 57%, 45%)
HSV	hsv(240, 73%, 70%)
CMYK	cmyk(72.6%, 72.6%, 0%, 29.8%)
CIE-LAB	lab(29.67, 43.05, -68.29)
CIE-LCH	lch(29.67, 80.72, 302.22°)
OKLab	oklab(41.19% 0.012 -0.1975)
OKLCH	oklch(41.19% 0.198 273.5)
XYZ	xyz(10.4989, 6.1032, 43.2638)
Luminance	0.0610 (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

#3131B3 #B3B331

analogous

#3172B3 #3131B3 #7231B3

triadic

#3131B3 #B33131 #31B331

tetradic

#3131B3 #B33172 #B3B331 #31B372

square

#3131B3 #B33172 #B3B331 #31B372

split-complementary

#3131B3 #B37231 #72B331

monochromatic

#171753 #242483 #3131B3 #5252D0 #8282DD

Accessibility & contrast

On white

9.46

#3131B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#3131B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131B3

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131B3	#FFFFFF	#000000	##FFFFFF
##3131B3	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB7

Deuteranopia (green-blind)

#0040B1

Tritanopia (blue-blind)

#00566F

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3131b3;
/* rgb */ color: rgb(49, 49, 179);
/* oklch */ color: oklch(41.2% 0.198 273.5);

Tailwind

colors: {
  custom: {
    50: '#7d6acb',
    500: '#3131b3',
    950: '#000000',
  },
}

SCSS

$custom: #3131b3;
$custom-light: #7d6acb;
$custom-dark: #000000;

JSON

{
  "hex": "#3131b3",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 179
  },
  "hsl": {
    "h": 240,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.41191,
    "c": 0.1979,
    "h": 273.5
  },
  "luminance": 0.06104
}

Semantic roles & 50–950 ramp

primary

#3131B3

secondary

#C6C67A

accent

#E048E0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3131B3

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

Preview Lab → · Contrast checker → · Palette generator →