#FF643F#FF643F

#FF643F is a light, vivid red. Relative luminance 0.307; OKLCH L 69.7% C 0.196 H 34.7°. Best body text is #000000 at 7.15:1 contrast (WCAG AA passes).

Color values

HEX	#FF643F
RGB	rgb(255, 100, 63)
HSL	hsl(12, 100%, 62%)
HSV	hsv(12, 75%, 100%)
CMYK	cmyk(0%, 60.8%, 75.3%, 0%)
CIE-LAB	lab(62.29, 57.10, 50.60)
CIE-LCH	lch(62.29, 76.29, 41.55°)
OKLab	oklab(69.66% 0.1614 0.1118)
OKLCH	oklch(69.66% 0.196 34.7)
XYZ	xyz(46.6994, 30.7398, 8.1760)
Luminance	0.3073 (WCAG relative)
Temperature	warm
Family	red

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FF643F #3FDAFF

analogous

#FF3F7A #FF643F #FFC43F

triadic

#FF643F #3FFF64 #643FFF

tetradic

#FF643F #7AFF3F #3FDAFF #C43FFF

square

#FF643F #7AFF3F #3FDAFF #C43FFF

split-complementary

#FF643F #3FFFC4 #3F7AFF

monochromatic

#C42600 #FF3302 #FF643F #FF957C #FFC7B9

Accessibility & contrast

On white

2.94

#FF643F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.15

#FF643F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #FF643F

7.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FF643F	#FFFFFF	#000000	##000000
##FF643F	1.00	2.94	7.15	7.15
#FFFFFF	2.94	1.00	21.00	21.00
#000000	7.15	21.00	1.00	1.00
##000000	7.15	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8F813A

Deuteranopia (green-blind)

#B6A33A

Tritanopia (blue-blind)

#FF3E5C

Achromatopsia (no color)

#979797

Design tokens & code

CSS

--color: #ff643f;
/* rgb */ color: rgb(255, 100, 63);
/* oklch */ color: oklch(69.7% 0.196 34.7);

Tailwind

colors: {
  custom: {
    50: '#ff9676',
    500: '#ff643f',
    950: '#000000',
  },
}

SCSS

$custom: #ff643f;
$custom-light: #ff9676;
$custom-dark: #000000;

JSON

{
  "hex": "#ff643f",
  "rgb": {
    "r": 255,
    "g": 100,
    "b": 63
  },
  "hsl": {
    "h": 11.562,
    "s": 100,
    "l": 62.353
  },
  "oklch": {
    "l": 0.69657,
    "c": 0.19636,
    "h": 34.7
  },
  "luminance": 0.30733
}

Semantic roles & 50–950 ramp

primary

#FF643F

secondary

#AAE2F0

accent

#B9E600

background

#FFF9F7

surface

#FFF2ED

border

#D7CCC8

text

#1A0E09

muted

#877E7B

Preview Lab

Preview with #FF643F

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

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