Red#FF0000
#FF0000 is a light, highly saturated red. Relative luminance 0.213; OKLCH L 62.8% C 0.258 H 29.2°. Best body text is #000000 at 5.25:1 contrast (WCAG AA passes).
Color values
| HEX | #FF0000 |
|---|---|
| RGB | rgb(255, 0, 0) |
| HSL | hsl(0, 100%, 50%) |
| HSV | hsv(0, 100%, 100%) |
| CMYK | cmyk(0%, 100%, 100%, 0%) |
| CIE-LAB | lab(53.24, 80.09, 67.20) |
| CIE-LCH | lch(53.24, 104.55, 40.00°) |
| OKLab | oklab(62.8% 0.2249 0.1259) |
| OKLCH | oklch(62.8% 0.258 29.2) |
| XYZ | xyz(41.2456, 21.2673, 1.9334) |
| Luminance | 0.2126 (WCAG relative) |
| Temperature | warm |
| Family | red |
Closest named colors
Red
#FF0000
ΔE00 0.00
Fire Engine Red
#FE0002
ΔE00 0.29
Bright Red
#FF000D
ΔE00 1.24
Vermillion
#F4320C
ΔE00 2.50
Orangish Red
#F43605
ΔE00 3.32
Tomato Red
#EC2D01
ΔE00 3.44
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#FF0000 #00FFFF
analogous
#FF0080 #FF0000 #FF8000
triadic
#FF0000 #00FF00 #0000FF
tetradic
#FF0000 #80FF00 #00FFFF #7F00FF
square
#FF0000 #80FF00 #00FFFF #7F00FF
split-complementary
#FF0000 #00FF80 #007FFF
monochromatic
#850000 #C20000 #FF0000 #FF3D3D #FF7A7A
Accessibility & contrast
On white
4.00
#FF0000 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.25
#FF0000 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #FF0000
5.25:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##FF0000 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##FF0000 | 1.00 | 4.00 | 5.25 | 5.25 |
| #FFFFFF | 4.00 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.25 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.25 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#6D5F00
Deuteranopia (green-blind)
#A39000
Tritanopia (blue-blind)
#FF000F
Achromatopsia (no color)
#7F7F7F
Related colors
#E31004#C81708#AD1A0A#931B0B#7A1B0C#62190C#4B160A#341307#200C03#000000#FF3E22#FF5B3A#FF7352#FF8969#FF9E81#FFB299#FFC6B2#FFD9CB#FFECE5#FFFFFF#F52C15#EB3F24#E04C30#D5573CRust
#B7410E
Crimson
#DC143C
Black
#000000
Blue
#0000FF
Burgundy
#800020
Cardinal
#C41E3A
Cherry
#DE3163
Firebrick
#B22222
Palettes with this color
#8B6F4E
#A78A5B
#6B4F3A
#C9A87C
#4E3B2A
Earth Tone Palette
#8B2500
#C75B12
#E39B2D
#7A4B1B
#4E2E0F
Autumn Color Palette
#FAF9F6
#FDFDFB
#7B7B79
#F7F7F9
#D8D8D5
Off White Color Palette
#FFFDD0
#FFFFEA
#7E7D60
#DBDCF4
#DDDBB4
Cream Color Palette
Design tokens & code
CSS
--color: #ff0000; /* rgb */ color: rgb(255, 0, 0); /* oklch */ color: oklch(62.8% 0.258 29.2);
Tailwind
colors: {
custom: {
50: '#ff7352',
500: '#ff0000',
950: '#000000',
},
}SCSS
$custom: #ff0000; $custom-light: #ff7352; $custom-dark: #000000;
JSON
{
"hex": "#ff0000",
"rgb": {
"r": 255,
"g": 0,
"b": 0
},
"hsl": {
"h": 0,
"s": 100,
"l": 50
},
"oklch": {
"l": 0.62796,
"c": 0.25768,
"h": 29.2
},
"luminance": 0.2126
}Semantic roles & 50–950 ramp
primary
#FF0000
secondary
#74E7E7
accent
#FFFF29
background
#FFF7F5
surface
#FFEEE8
border
#D7C9C4
text
#1C0A03
muted
#887C78