#428adc

Havelock Blue

Closest match (98% match)

Color formats

RGB

rgb(66, 138, 220)

Red, Green, Blue components

HSL

hsl(212, 69%, 56%)

Hue, Saturation, Lightness

CMYK

cmyk(70, 37, 0, 14)

Print color encoding

Luminance

0.245

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#428adc

#dc9442

Analogous (Adjacent)

#42d7dc

#428adc

#4742dc

Triadic

#428adc

#dc428a

#8adc42

Split complementary

#428adc

#dc4742

#d7dc42

Complete conversion table

HEX

#428ADC

RGB

rgb(66,138,220)

RGBA

rgba(66,138,220, 1)

HSL

hsl(211.95,68.75%,56.08%)

OKLCH (Modern CSS)

oklch(0.63 0.14 253.6)

CSS Variable

--color: #428adc;

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

3.56

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

5.90

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#428adc#aeafdc

ORIG

SIM

Deuteranopia (green)

#428adc#7a70dc

ORIG

SIM

Tritanopia (blue)

#428adc#465d68

ORIG

SIM

Monochrome (color blind)

#428adc#888888

Mixing guide

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

MIXING PALETTE

74%

17%

10%

RYB PIGMENTS

Ultramarine blue

Pigment

74%

Titanium white

Pigment

17%

Cadmium yellow

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)

24.5%

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.

Olympic Blue

#4F8FE6

Too Blue to be True

#0088FF

Pool Water

#2188FF

Magical Merlin

#3D8ED0

Anzac

#DC9442

Royal Blue

#4742DC

Turquoise

#42D7DC

Cerise

#DC428A

Conifer

#8ADC42

Valencia

#DC4742

Malibu

#87C3FF

Endeavour

#0055A0