#3131B9#3131B9

#3131B9 is a dark, highly saturated blue. Relative luminance 0.064; OKLCH L 41.8% C 0.205 H 273.1°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#3131B9
RGB	rgb(49, 49, 185)
HSL	hsl(240, 58%, 46%)
HSV	hsv(240, 74%, 73%)
CMYK	cmyk(73.5%, 73.5%, 0%, 27.5%)
CIE-LAB	lab(30.28, 45.05, -70.85)
CIE-LCH	lch(30.28, 83.96, 302.45°)
OKLab	oklab(41.81% 0.011 -0.205)
OKLCH	oklch(41.81% 0.205 273.1)
XYZ	xyz(11.1190, 6.3512, 46.5295)
Luminance	0.0635 (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

#3131B9 #B9B931

analogous

#3175B9 #3131B9 #7531B9

triadic

#3131B9 #B93131 #31B931

tetradic

#3131B9 #B93175 #B9B931 #31B975

square

#3131B9 #B93175 #B9B931 #31B975

split-complementary

#3131B9 #B97531 #75B931

monochromatic

#171758 #242489 #3131B9 #5555D2 #8686DF

Accessibility & contrast

On white

9.25

#3131B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#3131B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131B9

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131B9	#FFFFFF	#000000	##FFFFFF
##3131B9	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBD

Deuteranopia (green-blind)

#0041B7

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3131b9;
/* rgb */ color: rgb(49, 49, 185);
/* oklch */ color: oklch(41.8% 0.205 273.1);

Tailwind

colors: {
  custom: {
    50: '#7e6bcf',
    500: '#3131b9',
    950: '#000000',
  },
}

SCSS

$custom: #3131b9;
$custom-light: #7e6bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3131b9",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 185
  },
  "hsl": {
    "h": 240,
    "s": 58.12,
    "l": 45.882
  },
  "oklch": {
    "l": 0.41809,
    "c": 0.20528,
    "h": 273.1
  },
  "luminance": 0.06352
}

Semantic roles & 50–950 ramp

primary

#3131B9

secondary

#C8C87D

accent

#E146E1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3131B9

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

Preview Lab → · Contrast checker → · Palette generator →