#901721#901721

#901721 is a dark, vivid red. Relative luminance 0.067; OKLCH L 42.4% C 0.155 H 23.4°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#901721
RGB	rgb(144, 23, 33)
HSL	hsl(355, 72%, 33%)
HSV	hsv(355, 84%, 56%)
CMYK	cmyk(0%, 84%, 77.1%, 43.5%)
CIE-LAB	lab(31.01, 48.81, 27.52)
CIE-LCH	lch(31.01, 56.03, 29.42°)
OKLab	oklab(42.42% 0.142 0.0615)
OKLCH	oklch(42.42% 0.155 23.4)
XYZ	xyz(12.0840, 6.6538, 2.0866)
Luminance	0.0665 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#901721 #179086

analogous

#90175E #901721 #904917

triadic

#901721 #219017 #172190

tetradic

#901721 #5E9017 #179086 #491790

square

#901721 #5E9017 #179086 #491790

split-complementary

#901721 #179049 #175E90

monochromatic

#260609 #5B0F15 #901721 #C51F2D #E1414E

Accessibility & contrast

On white

9.01

#901721 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#901721 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #901721

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##901721	#FFFFFF	#000000	##FFFFFF
##901721	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E3820

Deuteranopia (green-blind)

#5C521C

Tritanopia (blue-blind)

#9F001C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #901721;
/* rgb */ color: rgb(144, 23, 33);
/* oklch */ color: oklch(42.4% 0.155 23.4);

Tailwind

colors: {
  custom: {
    50: '#b9625c',
    500: '#901721',
    950: '#000000',
  },
}

SCSS

$custom: #901721;
$custom-light: #b9625c;
$custom-dark: #000000;

JSON

{
  "hex": "#901721",
  "rgb": {
    "r": 144,
    "g": 23,
    "b": 33
  },
  "hsl": {
    "h": 355.041,
    "s": 72.455,
    "l": 32.745
  },
  "oklch": {
    "l": 0.42418,
    "c": 0.1547,
    "h": 23.4
  },
  "luminance": 0.06652
}

Semantic roles & 50–950 ramp

primary

#901721

secondary

#42C1B7

accent

#EFE039

background

#FCF6F5

surface

#F8EBE9

border

#D1C6C5

text

#130604

muted

#827A79

Preview Lab

Preview with #901721

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

Preview Lab → · Contrast checker → · Palette generator →