#10387a

Chathams Blue

Closest match (88% match)

Color formats

RGB

rgb(16, 56, 122)

Red, Green, Blue components

HSL

hsl(217, 77%, 27%)

Hue, Saturation, Lightness

CMYK

cmyk(87, 54, 0, 52)

Print color encoding

Luminance

0.043

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#10387a

#7a5210

Analogous (Adjacent)

#106d7a

#10387a

#1d107a

Triadic

#10387a

#7a1038

#387a10

Split complementary

#10387a

#7a1d10

#6d7a10

Complete conversion table

HEX

#10387A

RGB

rgb(16,56,122)

RGBA

rgba(16,56,122, 1)

HSL

hsl(217.36,76.81%,27.06%)

OKLCH (Modern CSS)

oklch(0.36 0.12 260.1)

CSS Variable

--color: #10387a;

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

11.24

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

1.87

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#10387a#55567a

ORIG

SIM

Deuteranopia (green)

#10387a#37307a

ORIG

SIM

Tritanopia (blue)

#10387a#122125

ORIG

SIM

Monochrome (color blind)

#10387a#3b3b3b

Mixing guide

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

MIXING PALETTE

52%

43%

RYB PIGMENTS

Ivory black

Pigment

52%

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)

4.3%

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.

Atlantic Navy

#13336F

Twilight Express

#1C3378

One Minute to Midnight

#003388

Neptune’s Dream

#003368

Raw Umber

#7A5210

Deep Koamaru

#1D107A

Surfie Green

#106D7A

Claret

#7A1038

Bilbao

#387A10

Pueblo

#7A1D10

San Marino

#556AB3

Stratos

#000845