#1b151f

Bastille

Closest match (95% match)

Color formats

RGB

rgb(27, 21, 31)

Red, Green, Blue components

HSL

hsl(276, 19%, 10%)

Hue, Saturation, Lightness

CMYK

cmyk(13, 32, 0, 88)

Print color encoding

Luminance

0.009

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#1b151f

#191f15

Analogous (Adjacent)

#16151f

#1b151f

#1f151e

Triadic

#1b151f

#1f1b15

#151f1b

Split complementary

#1b151f

#1e1f15

#151f16

Complete conversion table

HEX

#1B151F

RGB

rgb(27,21,31)

RGBA

rgba(27,21,31, 1)

HSL

hsl(276,19.23%,10.2%)

OKLCH (Modern CSS)

oklch(0.21 0.02 311.6)

CSS Variable

--color: #1b151f;

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

17.89

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.17

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#1b151f#191a1f

ORIG

SIM

Deuteranopia (green)

#1b151f#1c1c1f

ORIG

SIM

Tritanopia (blue)

#1b151f#1b1518

ORIG

SIM

Monochrome (color blind)

#1b151f#171717

Mixing guide

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

MIXING PALETTE

94%

RYB PIGMENTS

Ivory black

Pigment

94%

Cadmium red

Pigment

Ultramarine blue

Pigment

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

Violet hue

380–450 nm • closest visible-spectrum range

750 nm

380 nm

Visual temperature

Cool

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

Cool

Neutral

Warm

Luminance (brightness)

0.9%

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.

Back In Black

#16141C

Noir Fiction

#150811

Glossy Black

#110011

Eigengrau

#16161D

Log Cabin

#191F15

Thunder

#1F151E

Cinder

#16151F

Zeus

#1F1B15

Racing Green

#151F1B

Rangoon Green

#1E1F15

Gravel

#4A434F

Black

#000000