#3131B8#3131B8

#3131B8 is a dark, highly saturated blue. Relative luminance 0.063; OKLCH L 41.7% C 0.204 H 273.1°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#3131B8
RGB	rgb(49, 49, 184)
HSL	hsl(240, 58%, 46%)
HSV	hsv(240, 73%, 72%)
CMYK	cmyk(73.4%, 73.4%, 0%, 27.8%)
CIE-LAB	lab(30.18, 44.71, -70.42)
CIE-LCH	lch(30.18, 83.42, 302.41°)
OKLab	oklab(41.71% 0.0111 -0.2037)
OKLCH	oklch(41.71% 0.204 273.1)
XYZ	xyz(11.0138, 6.3092, 45.9755)
Luminance	0.0631 (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

#3131B8 #B8B831

analogous

#3174B8 #3131B8 #7431B8

triadic

#3131B8 #B83131 #31B831

tetradic

#3131B8 #B83174 #B8B831 #31B874

square

#3131B8 #B83174 #B8B831 #31B874

split-complementary

#3131B8 #B87431 #74B831

monochromatic

#171757 #242488 #3131B8 #5555D2 #8585DE

Accessibility & contrast

On white

9.28

#3131B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#3131B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3131B8

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3131B8	#FFFFFF	#000000	##FFFFFF
##3131B8	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EBC

Deuteranopia (green-blind)

#0040B6

Tritanopia (blue-blind)

#005872

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3131b8;
/* rgb */ color: rgb(49, 49, 184);
/* oklch */ color: oklch(41.7% 0.204 273.1);

Tailwind

colors: {
  custom: {
    50: '#7e6bcf',
    500: '#3131b8',
    950: '#000000',
  },
}

SCSS

$custom: #3131b8;
$custom-light: #7e6bcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3131b8",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 184
  },
  "hsl": {
    "h": 240,
    "s": 57.94,
    "l": 45.686
  },
  "oklch": {
    "l": 0.41705,
    "c": 0.20405,
    "h": 273.1
  },
  "luminance": 0.0631
}

Semantic roles & 50–950 ramp

primary

#3131B8

secondary

#C8C87D

accent

#E147E1

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3131B8

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

Preview Lab → · Contrast checker → · Palette generator →