#631F0F#631F0F

#631F0F is a dark, moderate red. Relative luminance 0.037; OKLCH L 34.4% C 0.102 H 34.5°. Best body text is #FFFFFF at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#631F0F
RGB	rgb(99, 31, 15)
HSL	hsl(11, 74%, 22%)
HSV	hsv(11, 85%, 39%)
CMYK	cmyk(0%, 68.7%, 84.8%, 61.2%)
CIE-LAB	lab(22.54, 29.84, 26.59)
CIE-LCH	lch(22.54, 39.96, 41.70°)
OKLab	oklab(34.36% 0.084 0.0577)
OKLCH	oklch(34.36% 0.102 34.5)
XYZ	xyz(5.7224, 3.6679, 0.8585)
Luminance	0.0367 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631F0F #0F5363

analogous

#630F29 #631F0F #63490F

triadic

#631F0F #0F631F #1F0F63

tetradic

#631F0F #29630F #0F5363 #490F63

square

#631F0F #29630F #0F5363 #490F63

split-complementary

#631F0F #0F6349 #0F2963

monochromatic

#1B0804 #2E0E07 #631F0F #983017 #CD401F

Accessibility & contrast

On white

12.11

#631F0F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#631F0F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631F0F

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631F0F	#FFFFFF	#000000	##FFFFFF
##631F0F	1.00	12.11	1.73	12.11
#FFFFFF	12.11	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#322C0D

Deuteranopia (green-blind)

#433B0C

Tritanopia (blue-blind)

#6E0C1C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #631f0f;
/* rgb */ color: rgb(99, 31, 15);
/* oklch */ color: oklch(34.4% 0.102 34.5);

Tailwind

colors: {
  custom: {
    50: '#965e4e',
    500: '#631f0f',
    950: '#000000',
  },
}

SCSS

$custom: #631f0f;
$custom-light: #965e4e;
$custom-dark: #000000;

JSON

{
  "hex": "#631f0f",
  "rgb": {
    "r": 99,
    "g": 31,
    "b": 15
  },
  "hsl": {
    "h": 11.429,
    "s": 73.684,
    "l": 22.353
  },
  "oklch": {
    "l": 0.3436,
    "c": 0.10194,
    "h": 34.5
  },
  "luminance": 0.03667
}

Semantic roles & 50–950 ramp

primary

#631F0F

secondary

#32889C

accent

#CDF037

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0F0502

muted

#7E7978

Preview Lab

Preview with #631F0F

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

Preview Lab → · Contrast checker → · Palette generator →