#a66b35

Copper

Closest match (95% match)

Color formats

RGB

rgb(166, 107, 53)

Red, Green, Blue components

HSL

hsl(29, 52%, 43%)

Hue, Saturation, Lightness

CMYK

cmyk(0, 36, 68, 35)

Print color encoding

Luminance

0.189

Relative luminance

Variations

Shades (Darkening)

Tints (Lightening)

Tones (Reduced saturation)

Harmonies

Click the color slices to copy the code.

Complementary (Opposite)

#a66b35

#3570a6

Analogous (Adjacent)

#a63537

#a66b35

#a6a335

Triadic

#a66b35

#35a66b

#6b35a6

Split complementary

#a66b35

#35a6a4

#3537a6

Complete conversion table

HEX

#A66B35

RGB

rgb(166,107,53)

RGBA

rgba(166,107,53, 1)

HSL

hsl(28.67,51.6%,42.94%)

OKLCH (Modern CSS)

oklch(0.58 0.10 60.9)

CSS Variable

--color: #a66b35;

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

4.40

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

On black background

4.78

Small text (14pt)

The quick brown fox jumps over...

AAA

Large text or UI (18pt Bold)

AAA

Color blindness simulator

ORIG

SIM

Protanopia (red)

#a66b35#535335

ORIG

SIM

Deuteranopia (green)

#a66b35#7b8435

ORIG

SIM

Tritanopia (blue)

#a66b35#a37a87

ORIG

SIM

Monochrome (color blind)

#a66b35#787878

Mixing guide

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

MIXING PALETTE

40%

36%

24%

RYB PIGMENTS

Cadmium red

Pigment

40%

Cadmium yellow

Pigment

36%

Ivory black

Pigment

24%

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

Orange hue

590–620 nm • closest visible-spectrum range

750 nm

380 nm

Visual temperature

Warm

A perceptual warm–cool classification. Kelvin does not apply to an arbitrary interface color.

Cool

Neutral

Warm

Luminance (brightness)

18.9%

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.

Eagle

#A26C36

Mai Tai

#A56531

Ginger Dough

#B06D3B

Inca Gold

#AA6D28

Astral

#3570A6

Sushi

#A6A335

Stiletto

#A63537

Chateau Green

#35A66B

Royal Purple

#6B35A6

Keppel

#35A6A4

Porsche

#E5A36A

Nutmeg Wood Finish

#693800