#bb1f1f

Thunderbird

Closest match (96% match)

Color formats

RGB

rgb(187, 31, 31)

Red, Green, Blue components

HSL

hsl(0, 72%, 43%)

Hue, Saturation, Lightness

CMYK

cmyk(0, 83, 83, 27)

Print color encoding

Luminance

0.116

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#bb1f1f

#1fbbbb

Analogous (Adjacent)

#bb1f6d

#bb1f1f

#bb6d1f

Triadic

#bb1f1f

#1fbb1f

#1f1fbb

Split complementary

#bb1f1f

#1fbb6d

#1f6dbb

Complete conversion table

HEX

#BB1F1F

RGB

rgb(187,31,31)

RGBA

rgba(187,31,31, 1)

HSL

hsl(0,71.56%,42.75%)

OKLCH (Modern CSS)

oklch(0.51 0.19 27.3)

CSS Variable

--color: #bb1f1f;

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

6.31

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

3.33

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#bb1f1f#1f1f1f

ORIG

SIM

Deuteranopia (green)

#bb1f1f#7f8c1f

ORIG

SIM

Tritanopia (blue)

#bb1f1f#b35f68

ORIG

SIM

Monochrome (color blind)

#bb1f1f#7d564f

Mixing guide

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

MIXING PALETTE

81%

19%

RYB PIGMENTS

Cadmium red

Pigment

81%

Ivory black

Pigment

19%

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)

11.6%

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.

Red Inferno

#BB1E1E

Heartwarming

#BF1818

Red Carpet

#BC2026

Scarlet Blaze

#B21F1F

Java

#1FBBBB

Bourbon

#BB6D1F

Maroon Flush

#BB1F6D

Forest Green

#1FBB1F

Persian Blue

#1F1FBB

Mountain Meadow

#1FBB6D

Persimmon

#FF6251

Maroon

#790000