#00121e

Swamp

Closest match (90% match)

Color formats

RGB

rgb(0, 18, 30)

Red, Green, Blue components

HSL

hsl(204, 100%, 6%)

Hue, Saturation, Lightness

CMYK

cmyk(100, 40, 0, 88)

Print color encoding

Luminance

0.005

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#00121e

#1e0c00

Analogous (Adjacent)

#001e1b

#00121e

#00031e

Triadic

#00121e

#1e0012

#121e00

Split complementary

#00121e

#1e0003

#1e1b00

Complete conversion table

HEX

#00121E

RGB

rgb(0,18,30)

RGBA

rgba(0,18,30, 1)

HSL

hsl(204,100%,5.88%)

OKLCH (Modern CSS)

oklch(0.17 0.04 236.5)

CSS Variable

--color: #00121e;

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

19.00

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.11

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#00121e#17171e

ORIG

SIM

Deuteranopia (green)

#00121e#0b091e

ORIG

SIM

Tritanopia (blue)

#00121e#01080a

ORIG

SIM

Monochrome (color blind)

#00121e#101010

Mixing guide

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

MIXING PALETTE

88%

10%

RYB PIGMENTS

Ivory black

Pigment

88%

Ultramarine blue

Pigment

10%

Cadmium yellow

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

Blue hue

450–495 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)

0.5%

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.

Midnight Edition

#0C121B

Black Knight

#010B13

The Count’s Black

#102030

Dark Rift

#060B14

Nero

#1E0C00

Black Russian

#00031E

Swamp

#001E1B

Toledo

#1E0012

Deep Fir

#121E00

Diesel

#1E0003

Oxford Blue

#32404D

Black

#000000