#A63F1F#A63F1F

#A63F1F is a mid, vivid red. Relative luminance 0.118; OKLCH L 50.5% C 0.143 H 37.2°. Best body text is #FFFFFF at 6.26:1 contrast (WCAG AA passes).

Color values

HEX	#A63F1F
RGB	rgb(166, 63, 31)
HSL	hsl(14, 69%, 39%)
HSV	hsv(14, 81%, 65%)
CMYK	cmyk(0%, 62%, 81.3%, 34.9%)
CIE-LAB	lab(40.84, 40.82, 40.17)
CIE-LCH	lch(40.84, 57.27, 44.54°)
OKLab	oklab(50.54% 0.1141 0.0867)
OKLCH	oklch(50.54% 0.143 37.2)
XYZ	xyz(17.7527, 11.7634, 2.6318)
Luminance	0.1176 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#A63F1F #1F86A6

analogous

#A61F42 #A63F1F #A6821F

triadic

#A63F1F #1FA63F #3F1FA6

tetradic

#A63F1F #42A61F #1F86A6 #821FA6

square

#A63F1F #42A61F #1F86A6 #821FA6

split-complementary

#A63F1F #1FA682 #1F42A6

monochromatic

#3F180C #722B15 #A63F1F #D7542B #E17D5E

Accessibility & contrast

On white

6.26

#A63F1F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.35

#A63F1F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #A63F1F

6.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##A63F1F	#FFFFFF	#000000	##FFFFFF
##A63F1F	1.00	6.26	3.35	6.26
#FFFFFF	6.26	1.00	21.00	1.00
#000000	3.35	21.00	1.00	21.00
##FFFFFF	6.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C521A

Deuteranopia (green-blind)

#76691B

Tritanopia (blue-blind)

#B72539

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #a63f1f;
/* rgb */ color: rgb(166, 63, 31);
/* oklch */ color: oklch(50.5% 0.143 37.2);

Tailwind

colors: {
  custom: {
    50: '#c8785d',
    500: '#a63f1f',
    950: '#000000',
  },
}

SCSS

$custom: #a63f1f;
$custom-light: #c8785d;
$custom-dark: #000000;

JSON

{
  "hex": "#a63f1f",
  "rgb": {
    "r": 166,
    "g": 63,
    "b": 31
  },
  "hsl": {
    "h": 14.222,
    "s": 68.528,
    "l": 38.627
  },
  "oklch": {
    "l": 0.50543,
    "c": 0.14326,
    "h": 37.2
  },
  "luminance": 0.11761
}

Semantic roles & 50–950 ramp

primary

#A63F1F

secondary

#5BACC5

accent

#C2EB3C

background

#FDF7F5

surface

#FAEDE9

border

#D3C8C5

text

#150904

muted

#837B79

Preview Lab

Preview with #A63F1F

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

Preview Lab → · Contrast checker → · Palette generator →