#B0243B#B0243B

#B0243B is a mid, vivid red. Relative luminance 0.108; OKLCH L 49.8% C 0.174 H 18.0°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#B0243B
RGB	rgb(176, 36, 59)
HSL	hsl(350, 66%, 42%)
HSV	hsv(350, 80%, 69%)
CMYK	cmyk(0%, 79.5%, 66.5%, 31%)
CIE-LAB	lab(39.26, 55.83, 22.69)
CIE-LCH	lch(39.26, 60.27, 22.11°)
OKLab	oklab(49.82% 0.1659 0.0539)
OKLCH	oklch(49.82% 0.174 18)
XYZ	xyz(19.3269, 10.8106, 5.2058)
Luminance	0.1081 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B0243B #24B099

analogous

#B02481 #B0243B #B05324

triadic

#B0243B #3BB024 #243BB0

tetradic

#B0243B #81B024 #24B099 #5324B0

square

#B0243B #81B024 #24B099 #5324B0

split-complementary

#B0243B #24B053 #2481B0

monochromatic

#4A0F19 #7D1A2A #B0243B #D73A54 #E16D80

Accessibility & contrast

On white

6.64

#B0243B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#B0243B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B0243B

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B0243B	#FFFFFF	#000000	##FFFFFF
##B0243B	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E4A3B

Deuteranopia (green-blind)

#716737

Tritanopia (blue-blind)

#C1002E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #b0243b;
/* rgb */ color: rgb(176, 36, 59);
/* oklch */ color: oklch(49.8% 0.174 18.0);

Tailwind

colors: {
  custom: {
    50: '#cf6d70',
    500: '#b0243b',
    950: '#000000',
  },
}

SCSS

$custom: #b0243b;
$custom-light: #cf6d70;
$custom-dark: #000000;

JSON

{
  "hex": "#b0243b",
  "rgb": {
    "r": 176,
    "g": 36,
    "b": 59
  },
  "hsl": {
    "h": 350.143,
    "s": 66.038,
    "l": 41.569
  },
  "oklch": {
    "l": 0.4982,
    "c": 0.17441,
    "h": 18
  },
  "luminance": 0.10808
}

Semantic roles & 50–950 ramp

primary

#B0243B

secondary

#68C8B8

accent

#E9CD3F

background

#FDF7F6

surface

#FBEDEC

border

#D4C8C7

text

#150807

muted

#837B7A

Preview Lab

Preview with #B0243B

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

Preview Lab → · Contrast checker → · Palette generator →