#31317B#31317B

#31317B is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.9% C 0.123 H 278.3°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#31317B
RGB	rgb(49, 49, 123)
HSL	hsl(240, 43%, 34%)
HSV	hsv(240, 60%, 48%)
CMYK	cmyk(60.2%, 60.2%, 0%, 51.8%)
CIE-LAB	lab(24.57, 23.52, -42.29)
CIE-LCH	lch(24.57, 48.39, 299.08°)
OKLab	oklab(35.93% 0.0176 -0.1214)
OKLCH	oklch(35.93% 0.123 278.3)
XYZ	xyz(5.9389, 4.2792, 19.2481)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31317B #7B7B31

analogous

#31567B #31317B #56317B

triadic

#31317B #7B3131 #317B31

tetradic

#31317B #7B3156 #7B7B31 #317B56

square

#31317B #7B3156 #7B7B31 #317B56

split-complementary

#31317B #7B5631 #567B31

monochromatic

#0E0E23 #20204F #31317B #4242A7 #6565C2

Accessibility & contrast

On white

11.31

#31317B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#31317B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #31317B

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31317B	#FFFFFF	#000000	##FFFFFF
##31317B	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7D

Deuteranopia (green-blind)

#003779

Tritanopia (blue-blind)

#034351

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #31317b;
/* rgb */ color: rgb(49, 49, 123);
/* oklch */ color: oklch(35.9% 0.123 278.3);

Tailwind

colors: {
  custom: {
    50: '#7169a2',
    500: '#31317b',
    950: '#000000',
  },
}

SCSS

$custom: #31317b;
$custom-light: #7169a2;
$custom-dark: #000000;

JSON

{
  "hex": "#31317b",
  "rgb": {
    "r": 49,
    "g": 49,
    "b": 123
  },
  "hsl": {
    "h": 240,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.35926,
    "c": 0.12265,
    "h": 278.3
  },
  "luminance": 0.0428
}

Semantic roles & 50–950 ramp

primary

#31317B

secondary

#A9A95F

accent

#D355D3

background

#F7F6FA

surface

#EDEBF3

border

#C8C6CD

text

#08060F

muted

#7B7A7F

Preview Lab

Preview with #31317B

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

Preview Lab → · Contrast checker → · Palette generator →