#631813#631813

#631813 is a dark, moderate red. Relative luminance 0.034; OKLCH L 33.5% C 0.108 H 28.2°. Best body text is #FFFFFF at 12.57:1 contrast (WCAG AA passes).

Color values

HEX	#631813
RGB	rgb(99, 24, 19)
HSL	hsl(4, 68%, 23%)
HSV	hsv(4, 81%, 39%)
CMYK	cmyk(0%, 75.8%, 80.8%, 61.2%)
CIE-LAB	lab(21.41, 33.20, 23.05)
CIE-LCH	lch(21.41, 40.42, 34.77°)
OKLab	oklab(33.52% 0.0954 0.0512)
OKLCH	oklch(33.52% 0.108 28.2)
XYZ	xyz(5.5904, 3.3538, 0.9689)
Luminance	0.0335 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#631813 #135E63

analogous

#631336 #631813 #634013

triadic

#631813 #136318 #181363

tetradic

#631813 #366313 #135E63 #401363

square

#631813 #366313 #135E63 #401363

split-complementary

#631813 #136340 #133663

monochromatic

#1A0605 #300C09 #631813 #96241D #CA3127

Accessibility & contrast

On white

12.57

#631813 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#631813 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #631813

12.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##631813	#FFFFFF	#000000	##FFFFFF
##631813	1.00	12.57	1.67	12.57
#FFFFFF	12.57	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E2912

Deuteranopia (green-blind)

#413910

Tritanopia (blue-blind)

#6E0018

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #631813;
/* rgb */ color: rgb(99, 24, 19);
/* oklch */ color: oklch(33.5% 0.108 28.2);

Tailwind

colors: {
  custom: {
    50: '#965b51',
    500: '#631813',
    950: '#000000',
  },
}

SCSS

$custom: #631813;
$custom-light: #965b51;
$custom-dark: #000000;

JSON

{
  "hex": "#631813",
  "rgb": {
    "r": 99,
    "g": 24,
    "b": 19
  },
  "hsl": {
    "h": 3.75,
    "s": 67.797,
    "l": 23.137
  },
  "oklch": {
    "l": 0.33524,
    "c": 0.10826,
    "h": 28.2
  },
  "luminance": 0.03353
}

Semantic roles & 50–950 ramp

primary

#631813

secondary

#37949B

accent

#E0EB3D

background

#F9F5F4

surface

#F2E9E7

border

#CCC5C3

text

#0F0402

muted

#7E7978

Preview Lab

Preview with #631813

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

Preview Lab → · Contrast checker → · Palette generator →