#631B87#631B87

#631B87 is a dark, vivid purple. Relative luminance 0.052; OKLCH L 39.5% C 0.170 H 311.2°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#631B87
RGB	rgb(99, 27, 135)
HSL	hsl(280, 67%, 32%)
HSV	hsv(280, 80%, 53%)
CMYK	cmyk(26.7%, 80%, 0%, 47.1%)
CIE-LAB	lab(27.26, 48.87, -45.21)
CIE-LCH	lch(27.26, 66.58, 317.23°)
OKLab	oklab(39.5% 0.112 -0.1281)
OKLCH	oklch(39.5% 0.17 311.2)
XYZ	xyz(9.9099, 5.1860, 23.3959)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	purple

Closest named colors

Royal Purple (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631B87 #3F871B

analogous

#2D1B87 #631B87 #871B75

triadic

#631B87 #87631B #1B8763

tetradic

#631B87 #872D1B #3F871B #1B7587

square

#631B87 #872D1B #3F871B #1B7587

split-complementary

#631B87 #75871B #1B872D

monochromatic

#180721 #3E1154 #631B87 #8825BA #A743D9

Accessibility & contrast

On white

10.31

#631B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#631B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631B87

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631B87	#FFFFFF	#000000	##FFFFFF
##631B87	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D8A

Deuteranopia (green-blind)

#004285

Tritanopia (blue-blind)

#5E3551

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #631b87;
/* rgb */ color: rgb(99, 27, 135);
/* oklch */ color: oklch(39.5% 0.170 311.2);

Tailwind

colors: {
  custom: {
    50: '#9461ab',
    500: '#631b87',
    950: '#000000',
  },
}

SCSS

$custom: #631b87;
$custom-light: #9461ab;
$custom-dark: #000000;

JSON

{
  "hex": "#631b87",
  "rgb": {
    "r": 99,
    "g": 27,
    "b": 135
  },
  "hsl": {
    "h": 280,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39495,
    "c": 0.17017,
    "h": 311.2
  },
  "luminance": 0.05186
}

Semantic roles & 50–950 ramp

primary

#631B87

secondary

#6BBA44

accent

#EA3E77

background

#F9F6FA

surface

#F2EBF4

border

#CCC6CE

text

#0E0510

muted

#7E7A7F

Preview Lab

Preview with #631B87

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

Preview Lab → · Contrast checker → · Palette generator →