#31309D#31309D

#31309D is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.8% C 0.171 H 275.3°. Best body text is #FFFFFF at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#31309D
RGB	rgb(49, 48, 157)
HSL	hsl(241, 53%, 40%)
HSV	hsv(241, 69%, 62%)
CMYK	cmyk(68.8%, 69.4%, 0%, 38.4%)
CIE-LAB	lab(27.30, 36.15, -58.94)
CIE-LCH	lch(27.30, 69.15, 301.52°)
OKLab	oklab(38.84% 0.0159 -0.1702)
OKLCH	oklch(38.84% 0.171 275.3)
XYZ	xyz(8.4074, 5.2004, 32.4525)
Luminance	0.0520 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31309D #9C9D30

analogous

#30669D #31309D #67309D

triadic

#31309D #9D3130 #309D31

tetradic

#31309D #9D3066 #9C9D30 #309D67

square

#31309D #9D3066 #9C9D30 #309D67

split-complementary

#31309D #9D6730 #669D30

monochromatic

#14133F #22226E #31309D #4544C6 #7473D4

Accessibility & contrast

On white

10.29

#31309D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#31309D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31309D

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31309D	#FFFFFF	#000000	##FFFFFF
##31309D	1.00	10.29	2.04	10.29
#FFFFFF	10.29	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A0

Deuteranopia (green-blind)

#003C9B

Tritanopia (blue-blind)

#004D62

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #31309d;
/* rgb */ color: rgb(49, 48, 157);
/* oklch */ color: oklch(38.8% 0.171 275.3);

Tailwind

colors: {
  custom: {
    50: '#7869bb',
    500: '#31309d',
    950: '#000000',
  },
}

SCSS

$custom: #31309d;
$custom-light: #7869bb;
$custom-dark: #000000;

JSON

{
  "hex": "#31309d",
  "rgb": {
    "r": 49,
    "g": 48,
    "b": 157
  },
  "hsl": {
    "h": 240.55,
    "s": 53.171,
    "l": 40.196
  },
  "oklch": {
    "l": 0.38837,
    "c": 0.17098,
    "h": 275.3
  },
  "luminance": 0.05201
}

Semantic roles & 50–950 ramp

primary

#31309D

secondary

#BBBC6D

accent

#DD4BDB

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #31309D

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

Preview Lab → · Contrast checker → · Palette generator →