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Red Color

#ff0000

Red Color

Web safe Reds

Pure red sits at 0° on the hue wheel and is the most visually intense of the primary colors, commonly used to signal urgency, passion, or danger.

Nearest Tailwind class red-600 #e7000b · ΔE 5.4

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#ff0000

RGB

rgb(255, 0, 0)

HSL

hsl(0, 100%, 50%)

HSV / HSB

hsv(0, 100%, 100%)

CMYK

cmyk(0%, 100%, 100%, 0%)

LAB

lab(53.24, 80.09, 67.2)

LCH

lch(53.24, 104.55, 40)

OKLCH

oklch(62.8%, 0.2577, 29.22)

HWB

hwb(0, 0%, 0%)

Harmony colors

Complementary

#00ffff

Analogous

#ff0080

#ff0000

#ff8000

Triadic

#ff0000

#00ff00

#0000ff

Split-complementary

#ff0000

#00ff80

#0080ff

Tetradic

#ff0000

#ffff00

#00ffff

#0000ff

Square

#ff0000

#80ff00

#00ffff

#8000ff

Shades

Red Color mixed toward black.

#d50000

#aa0000

#800000

#550000

#2a0000

Tints

Red Color mixed toward white.

#ff2a2a

#ff5555

#ff8080

#ffaaaa

#ffd5d5

Tones

Red Color mixed toward gray.

#ea1515

#d52a2a

#bf4040

#aa5555

#956a6a

Accessibility

Aa White text on this color

4:1

Aa Black text on this color

5.25:1

Black text reads better on this background (5.25:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#c6c500 · ΔE 56.2

Deuteranopia

#cfda00 · ΔE 61.4

Tritanopia

#f90000 · ΔE 1.3

Achromatopsia

#7f7f7f · ΔE 31.2

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #ff0000;

Tailwind (arbitrary value)

bg-[#ff0000]

Related colors

Maroon #800000

Black #000000

Brown #a52a2a

Dark Gray #a9a9a9

Dark Red #8b0000

Dim Gray #696969

Frequently asked questions

Red (#ff0000) is rgb(255, 0, 0) in RGB.

Yes, #ff0000 is one of the 216 web-safe colors — every channel is a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #ff0000, or check how it holds up for accessibility.

Generate a palette → Check contrast