#1c3378

Twilight Express

ReadyTools Database (Exact)

Biscay

~96% match

Color formats

RGB

rgb(28, 51, 120)

Red, Green, Blue components

HSL

hsl(225, 62%, 29%)

Hue, Saturation, Lightness

CMYK

cmyk(77, 58, 0, 53)

Print color encoding

Luminance

0.040

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#1c3378

#78611c

Analogous (Adjacent)

#1c6178

#1c3378

#331c78

Triadic

#1c3378

#781c33

#33781c

Split complementary

#1c3378

#78331c

#61781c

Complete conversion table

HEX

#1C3378

RGB

rgb(28,51,120)

RGBA

rgba(28,51,120, 1)

HSL

hsl(225,62.16%,29.02%)

OKLCH (Modern CSS)

oklch(0.35 0.12 266.2)

CSS Variable

--color: #1c3378;

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

11.70

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.79

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#1c3378#515278

ORIG

SIM

Deuteranopia (green)

#1c3378#3e3878

ORIG

SIM

Tritanopia (blue)

#1c3378#1d2428

ORIG

SIM

Monochrome (color blind)

#1c3378#383838

Mixing guide

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

MIXING PALETTE

54%

43%

RYB PIGMENTS

Ivory black

Pigment

54%

Ultramarine blue

Pigment

43%

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)

4.0%

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.

Below the Surface

#0A2F7C

Atlantic Navy

#13336F

One Minute to Midnight

#003388

Intergalactic Highway

#273287

Himalaya

#78611C

Meteorite

#331C78

Blumine

#1C6178

Claret

#781C33

Forest Green

#33781C

Red Robin

#78331C

Blue Violet

#5B65B1

Stratos

#000143