#FF403F#FF403F

#FF403F is a light, highly saturated red. Relative luminance 0.253; OKLCH L 66.0% C 0.227 H 26.3°. Best body text is #000000 at 6.06:1 contrast (WCAG AA passes).

Color values

HEX	#FF403F
RGB	rgb(255, 64, 63)
HSL	hsl(0, 100%, 62%)
HSV	hsv(0, 75%, 100%)
CMYK	cmyk(0%, 74.9%, 75.3%, 0%)
CIE-LAB	lab(57.36, 70.51, 45.35)
CIE-LCH	lch(57.36, 83.84, 32.75°)
OKLab	oklab(65.96% 0.2034 0.1004)
OKLCH	oklch(65.96% 0.227 26.3)
XYZ	xyz(43.9758, 25.2926, 7.2681)
Luminance	0.2529 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FF403F #3FFEFF

analogous

#FF3F9E #FF403F #FFA03F

triadic

#FF403F #3FFF40 #403FFF

tetradic

#FF403F #9EFF3F #3FFEFF #A03FFF

square

#FF403F #9EFF3F #3FFEFF #A03FFF

split-complementary

#FF403F #3FFFA0 #3F9EFF

monochromatic

#C40100 #FF0302 #FF403F #FF7D7C #FFBAB9

Accessibility & contrast

On white

3.47

#FF403F on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.06

#FF403F on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #FF403F

6.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FF403F	#FFFFFF	#000000	##000000
##FF403F	1.00	3.47	6.06	6.06
#FFFFFF	3.47	1.00	21.00	21.00
#000000	6.06	21.00	1.00	1.00
##000000	6.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A6F3D

Deuteranopia (green-blind)

#AA9937

Tritanopia (blue-blind)

#FF0042

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #ff403f;
/* rgb */ color: rgb(255, 64, 63);
/* oklch */ color: oklch(66.0% 0.227 26.3);

Tailwind

colors: {
  custom: {
    50: '#ff8375',
    500: '#ff403f',
    950: '#000000',
  },
}

SCSS

$custom: #ff403f;
$custom-light: #ff8375;
$custom-dark: #000000;

JSON

{
  "hex": "#ff403f",
  "rgb": {
    "r": 255,
    "g": 64,
    "b": 63
  },
  "hsl": {
    "h": 0.312,
    "s": 100,
    "l": 62.353
  },
  "oklch": {
    "l": 0.65963,
    "c": 0.2268,
    "h": 26.3
  },
  "luminance": 0.25286
}

Semantic roles & 50–950 ramp

primary

#FF403F

secondary

#AAF0F0

accent

#E4E600

background

#FFF8F7

surface

#FFF0ED

border

#D7CBC8

text

#1B0C08

muted

#887D7B

Preview Lab

Preview with #FF403F

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

Preview Lab → · Contrast checker → · Palette generator →