#21098e

Ultramarine

Closest match (99% match)

Color formats

RGB

rgb(33, 9, 142)

Red, Green, Blue components

HSL

hsl(251, 88%, 30%)

Hue, Saturation, Lightness

CMYK

cmyk(77, 94, 0, 44)

Print color encoding

Luminance

0.025

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#21098e

#768e09

Analogous (Adjacent)

#09338e

#21098e

#63098e

Triadic

#21098e

#8e2109

#098e21

Split complementary

#21098e

#8e6409

#348e09

Complete conversion table

HEX

#21098E

RGB

rgb(33,9,142)

RGBA

rgba(33,9,142, 1)

HSL

hsl(250.83,88.08%,29.61%)

OKLCH (Modern CSS)

oklch(0.31 0.19 274.3)

CSS Variable

--color: #21098e;

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

14.05

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.49

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#21098e#44458e

ORIG

SIM

Deuteranopia (green)

#21098e#49428e

ORIG

SIM

Tritanopia (blue)

#21098e#201214

ORIG

SIM

Monochrome (color blind)

#21098e#32244c

Mixing guide

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

MIXING PALETTE

49%

42%

10%

RYB PIGMENTS

Ultramarine blue

Pigment

49%

Ivory black

Pigment

42%

Cadmium red

Pigment

10%

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)

2.5%

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.

Dramatic Blue

#240093

Nightly Expedition

#221188

Orbital Kingdom

#220088

Galactic Cruise

#111188

Limeade

#768E09

Purple

#63098E

Catalina Blue

#09338E

Totem Pole

#8E2109

Salem

#098E21

Corn Harvest

#8E6409

Purple Heart

#6741CA

Stratos

#000057