#B03F3F#B03F3F

#B03F3F is a mid, vivid red. Relative luminance 0.131; OKLCH L 52.6% C 0.148 H 23.7°. Best body text is #FFFFFF at 5.79:1 contrast (WCAG AA passes).

Color values

HEX	#B03F3F
RGB	rgb(176, 63, 63)
HSL	hsl(0, 47%, 47%)
HSV	hsv(0, 64%, 69%)
CMYK	cmyk(0%, 64.2%, 64.2%, 31%)
CIE-LAB	lab(42.98, 46.01, 24.94)
CIE-LCH	lch(42.98, 52.33, 28.46°)
OKLab	oklab(52.62% 0.1354 0.0594)
OKLCH	oklch(52.62% 0.148 23.7)
XYZ	xyz(20.5812, 13.1468, 6.1555)
Luminance	0.1314 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#B03F3F #3FB0B0

analogous

#B03F78 #B03F3F #B0783F

triadic

#B03F3F #3FB03F #3F3FB0

tetradic

#B03F3F #78B03F #3FB0B0 #783FB0

square

#B03F3F #78B03F #3FB0B0 #783FB0

split-complementary

#B03F3F #3FB078 #3F78B0

monochromatic

#561F1F #832F2F #B03F3F #C86565 #D89292

Accessibility & contrast

On white

5.79

#B03F3F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.63

#B03F3F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #B03F3F

5.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##B03F3F	#FFFFFF	#000000	##FFFFFF
##B03F3F	1.00	5.79	3.63	5.79
#FFFFFF	5.79	1.00	21.00	1.00
#000000	3.63	21.00	1.00	21.00
##FFFFFF	5.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D563E

Deuteranopia (green-blind)

#796E3C

Tritanopia (blue-blind)

#C12640

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #b03f3f;
/* rgb */ color: rgb(176, 63, 63);
/* oklch */ color: oklch(52.6% 0.148 23.7);

Tailwind

colors: {
  custom: {
    50: '#ce7a74',
    500: '#b03f3f',
    950: '#000000',
  },
}

SCSS

$custom: #b03f3f;
$custom-light: #ce7a74;
$custom-dark: #000000;

JSON

{
  "hex": "#b03f3f",
  "rgb": {
    "r": 176,
    "g": 63,
    "b": 63
  },
  "hsl": {
    "h": 0,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.52619,
    "c": 0.14787,
    "h": 23.7
  },
  "luminance": 0.13144
}

Semantic roles & 50–950 ramp

primary

#B03F3F

secondary

#88C3C3

accent

#D7D751

background

#FDF7F7

surface

#FBEEED

border

#D4C9C8

text

#150908

muted

#837B7B

Preview Lab

Preview with #B03F3F

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

Preview Lab → · Contrast checker → · Palette generator →