#aa0000

Heartbeat

ReadyTools Database (Exact)

Bright Red

~99% match

Color formats

RGB

rgb(170, 0, 0)

Red, Green, Blue components

HSL

hsl(0, 100%, 33%)

Hue, Saturation, Lightness

CMYK

cmyk(0, 100, 100, 33)

Print color encoding

Luminance

0.085

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#aa0000

#00aaaa

Analogous (Adjacent)

#aa0055

#aa0000

#aa5500

Triadic

#aa0000

#00aa00

#0000aa

Split complementary

#aa0000

#00aa55

#0055aa

Complete conversion table

HEX

#AA0000

RGB

rgb(170,0,0)

RGBA

rgba(170,0,0, 1)

HSL

hsl(0,100%,33.33%)

OKLCH (Modern CSS)

oklch(0.46 0.19 29.2)

CSS Variable

--color: #aa0000;

Preview

Readability and Typography

Headline Test

This text demonstrates the reading experience on this background color.

Headline Test

This text demonstrates the reading experience on this background color.

UI Component Set

This is an example alert bar using the selected color.

SOLIDSOFTOUTLINE

Product Mockup

4582 •••• •••• 9018

CARDHOLDER

JOHN DOE

VALID

12/28

Mobile application

Customer support

Hi! How can we help you today?

I love this new color! 😍

Data visualization

Weekly growth

+1,240

12.5%

WED

2,450

Contrast

Contrast and readability (WCAG)

On white background

7.75

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

2.71

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#aa0000#000000

ORIG

SIM

Deuteranopia (green)

#aa0000#697700

ORIG

SIM

Tritanopia (blue)

#aa0000#a24950

ORIG

SIM

Monochrome (color blind)

#aa0000#74473c

Mixing guide

How to mix this color using physical paints or printing inks.

MIXING PALETTE

67%

33%

RYB PIGMENTS

Cadmium red

Pigment

67%

Ivory black

Pigment

33%

Unlike light, mixing paints makes colors darker. This simulation mimics the behavior of physical pigments.

Physical properties

Perceptual and light-related properties derived from the digital color.

Spectral relationship

Red hue

620–750 nm • closest visible-spectrum range

750 nm

380 nm

Visual temperature

Warm

A perceptual warm–cool classification. Kelvin does not apply to an arbitrary interface color.

Cool

Neutral

Warm

Luminance (brightness)

8.5%

Dark • relative luminance

50%

100%

An RGB color is produced by combined screen light, so this range is a visual comparison rather than an exact physical wavelength.

Gradient gallery

Generate premium CSS backgrounds and textures from your color.

Similar & Related Colors

Mathematically computed harmonies, shades, and similar tones for this color.

Velvet Volcano

#AB0102

Kid Icarus

#A81000

Gory Red

#A30800

Cacodemon Red

#9F0000

Persian Green

#00AAAA

Chelsea Gem

#AA5500

Lipstick

#AA0055

Phosphor Green

#00AA00

Bohemian Blue

#0000AA

Green Haze

#00AA55

Flamingo

#EF5234

Lonestar

#6A0000