#631B0F#631B0F

#631B0F is a dark, moderate red. Relative luminance 0.035; OKLCH L 33.8% C 0.106 H 32.0°. Best body text is #FFFFFF at 12.40:1 contrast (WCAG AA passes).

Color values

HEX	#631B0F
RGB	rgb(99, 27, 15)
HSL	hsl(9, 74%, 22%)
HSV	hsv(9, 85%, 39%)
CMYK	cmyk(0%, 72.7%, 84.8%, 61.2%)
CIE-LAB	lab(21.84, 31.73, 25.85)
CIE-LCH	lch(21.84, 40.92, 39.17°)
OKLab	oklab(33.84% 0.0899 0.0562)
OKLCH	oklch(33.84% 0.106 32)
XYZ	xyz(5.6244, 3.4718, 0.8258)
Luminance	0.0347 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631B0F #0F5763

analogous

#630F2D #631B0F #63450F

triadic

#631B0F #0F631B #1B0F63

tetradic

#631B0F #2D630F #0F5763 #450F63

square

#631B0F #2D630F #0F5763 #450F63

split-complementary

#631B0F #0F6345 #0F2D63

monochromatic

#1B0704 #2E0D07 #631B0F #982917 #CD381F

Accessibility & contrast

On white

12.40

#631B0F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#631B0F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631B0F

12.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631B0F	#FFFFFF	#000000	##FFFFFF
##631B0F	1.00	12.40	1.69	12.40
#FFFFFF	12.40	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#302A0D

Deuteranopia (green-blind)

#423A0C

Tritanopia (blue-blind)

#6E0419

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #631b0f;
/* rgb */ color: rgb(99, 27, 15);
/* oklch */ color: oklch(33.8% 0.106 32.0);

Tailwind

colors: {
  custom: {
    50: '#965c4e',
    500: '#631b0f',
    950: '#000000',
  },
}

SCSS

$custom: #631b0f;
$custom-light: #965c4e;
$custom-dark: #000000;

JSON

{
  "hex": "#631b0f",
  "rgb": {
    "r": 99,
    "g": 27,
    "b": 15
  },
  "hsl": {
    "h": 8.571,
    "s": 73.684,
    "l": 22.353
  },
  "oklch": {
    "l": 0.33835,
    "c": 0.10601,
    "h": 32
  },
  "luminance": 0.03471
}

Semantic roles & 50–950 ramp

primary

#631B0F

secondary

#328D9C

accent

#D6F037

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0F0401

muted

#7E7977

Preview Lab

Preview with #631B0F

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

Preview Lab → · Contrast checker → · Palette generator →