What color is #665A51?

#665A51 is a dark, grayish orange known as Underground. It belongs to the gray family of colors.

What is the RGB value of Underground?

The RGB value is 102, 90, 81: 102 red, 90 green and 81 blue on a 0 to 255 scale.

What is the complementary color of Underground?

The complementary color is #515D66, found by rotating the hue 180° on the color wheel.

Is black or white text better on #665A51?

White text. Black text has a contrast ratio of 3.15:1 and white text 6.67:1. WCAG asks for at least 4.5:1 for normal text.

Underground color: hex code #665A51

#665A51 rgb(102, 90, 81)

Shades of gray

Underground has the hex code #665A51. It is a dark, grayish orange.

In the RGB color model it is made of 40% red, 35.3% green and 31.8% blue (102, 90, 81).

Its hue angle is 26°, with 11% saturation and 36% lightness. For print, the CMYK equivalent is 0% cyan, 12% magenta, 21% yellow and 60% black.

White text is the more readable choice on this background (contrast 6.67:1).

Underground (#665A51) color codes

HEX	`#665A51`
RGB	`rgb(102, 90, 81)`
RGB percent	`rgb(40%, 35.3%, 31.8%)`
HSL	`hsl(26, 11%, 36%)`
HSV / HSB	`hsv(26, 21%, 40%)`
CMYK	`cmyk(0%, 12%, 21%, 60%)`
CIE LAB	`lab(39.12, 3.22, 6.98)`
CIE LCH	`lch(39.12, 7.69, 65.2)`
CIE XYZ	`xyz(10.621, 10.731, 9.295)`
Decimal	`6707793`
Short hex	`None (no 3-digit form)`

Color harmonies

Colors that go with Underground, based on their position on the color wheel.

Complementary

The color opposite on the color wheel (180°). Strongest contrast.

Analogous

Neighbors 30° either side. Calm, natural combinations.

Split complementary

The two colors next to the complement (150° and 210°).

Triadic

Three colors evenly spaced, 120° apart.

Tetradic (square)

Four colors 90° apart.

Shades, tints and tones

Shades (darker, mixed with black)

Tints (lighter, mixed with white)

Tones (mixed with gray)

Contrast and accessibility

Text on #665A51	Ratio	AA	AAA	AA large
Sample text	3.15:1	Fail	Fail	Pass
Sample text	6.67:1	Pass	Fail	Pass

#665A51 as text on	Ratio	AA	AAA	AA large
Sample text	6.67:1	Pass	Fail	Pass
Sample text	3.15:1	Fail	Fail	Pass

WCAG 2 asks for 4.5:1 for normal text (AA), 7:1 for AAA, and 3:1 for large text. Check other pairs.

Color blindness simulation

How #665A51 looks to people with the most common types of color vision deficiency.

CSS examples

.background { background-color: #665a51; }
.text { color: #665a51; }
.border { border: 2px solid #665a51; }
.transparent { background-color: rgb(102 90 81 / 50%); }
.gradient { background: linear-gradient(to right, #665a51, #666551); }

Background

Text color

Border

Similar colors

Closest common color name: Umber.

See #665A51 on its hex code page

Questions

What color is #665A51?: #665A51 is a dark, grayish orange known as Underground. It belongs to the gray family of colors.
What is the RGB value of Underground?: The RGB value is 102, 90, 81: 102 red, 90 green and 81 blue on a 0 to 255 scale.
What is the complementary color of Underground?: The complementary color is #515D66, found by rotating the hue 180° on the color wheel.
Is black or white text better on #665A51?: White text. Black text has a contrast ratio of 3.15:1 and white text 6.67:1. WCAG asks for at least 4.5:1 for normal text.