#5178bc

Steel Blue

Closest match (94% match)

Color formats

RGB

rgb(81, 120, 188)

Red, Green, Blue components

HSL

hsl(218, 44%, 53%)

Hue, Saturation, Lightness

CMYK

cmyk(57, 36, 0, 26)

Print color encoding

Luminance

0.188

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#5178bc

#bc9551

Analogous (Adjacent)

#51aebc

#5178bc

#6051bc

Triadic

#5178bc

#bc5178

#78bc51

Split complementary

#5178bc

#bc6051

#aebc51

Complete conversion table

HEX

#5178BC

RGB

rgb(81,120,188)

RGBA

rgba(81,120,188, 1)

HSL

hsl(218.13,44.4%,52.75%)

OKLCH (Modern CSS)

oklch(0.57 0.11 260.9)

CSS Variable

--color: #5178bc;

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

4.41

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

4.76

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#5178bc#9697bc

ORIG

SIM

Deuteranopia (green)

#5178bc#7871bc

ORIG

SIM

Tritanopia (blue)

#5178bc#535b66

ORIG

SIM

Monochrome (color blind)

#5178bc#787878

Mixing guide

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

MIXING PALETTE

80%

12%

RYB PIGMENTS

Ultramarine blue

Pigment

80%

Titanium white

Pigment

12%

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)

18.8%

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.

Endless River

#567AAD

Serenity’s Reign

#507BCE

Sail On

#4575AD

Montreux Blue

#5879A2

Twine

#BC9551

Blue Violet

#6051BC

Fountain Blue

#51AEBC

Blush

#BC5178

Mantis

#78BC51

Fuzzy Wuzzy Brown

#BC6051

Malibu

#8EB0F9

Congress Blue

#004482