Information about #663B3F color

#663B3F color image

Basic facts about this digital color

In the Register's classification, #663B3F belongs to the Red Color Family, featuring Mild Saturation and Neutral brightness. In numbers: rgb(102, 59, 63) (40% red, 23.1% green, 24.7% blue), or CMYK 0 / 17 / 15 / 60 for print. Curious how these numbers work? Read our RGB color codes guide.

A softly balanced earthy red, #663B3F holds a balanced mid-tone. Expect to see shades like this in understated, calm designs that favor harmony over drama. In The Official Register of Color Names it is practically indistinguishable from Purple Brown (#673A3F). Its next-closest registered neighbors are Solar Flare (#693E40) and Brunette (#634041).

The recipe behind #663B3F is rgb(102, 59, 63), with red as the dominant ingredient. If you plan to put text on a #663B3F background, choose white — the contrast ratio is 9.3:1 (passing WCAG AAA), while black manages only 2.3:1. On paper it relies strongly on black ink (K:60), so proof dark layouts before a large print run. Like most of the 16.7 million digital colors, this one is still waiting for a name — naming it takes a minute.

#663B3F color variations

View this color variations of tints, shades, tones and hues.

#663B3F color tints

Tints look brighter, pastel, and less intense.
#663B3F

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#93545B

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#B37A80

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#CCA6AA

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#E5D2D4

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White

#FFFFFF

#663B3F color shades

Shades look darker, richer, and more solid.
#663B3F

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#522F33

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#3E2326

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#291719

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#140B0C

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Black

#000000

#663B3F color tones

Tones looks more sophisticated and complex than base colors.
#663B3F

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#6E474B

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#745357

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#786163

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#7C6F71

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Grey

#808080

#663B3F color hues

A hue refers to the basic neighbors of color and is variation of base color on the color wheel.
#63673B

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#675A3B

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#67483B

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#663B3F

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#673B51

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#673B63

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#5A3B67

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#663B3F color harmonies

Color harmonies are pleasing color schemes created according to their position on a color wheel.

Complementary

Complementary color schemes are made by picking two opposite colors con the color wheel. They appear vibrant near to each other.

Complementary color schemes
#663B3F
#663B3F

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#3C6863
#3C6863

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Split complementary

Split complementary schemes are like complementary but they uses two adiacent colors of the complement. They are more flexible than complementary ones.

Split complementary color scheme
#663B3F
#663B3F

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#3C5668
#3C5668

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#3C684D
#3C684D

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Analogous

Analogous color schemes are made by picking three colors that are next to each other on the color wheel. They are perceived as calm and serene.

Analogous color scheme
#684D3C
#684D3C

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#663B3F
#663B3F

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#683C56
#683C56

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Triadic

Triadic color schemes are created by picking three colors equally spaced on the color wheel. They appear quite contrasted and multicolored.

Triadic color scheme
#663B3F
#663B3F

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#40683C
#40683C

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#3C4068
#3C4068

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Tetradic

Tetradic color schemes are made form two couples of complementary colors in a rectangular shape on the color wheel.

Tetradic color scheme
#663B3F
#663B3F

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#68633C
#68633C

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#3C6863
#3C6863

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#3C4068
#3C4068

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Square

Square color schemes are like tetradic arranged in a square instead of rectangle. Colors appear even more contrasting.

Square color scheme
#663B3F
#663B3F

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#56683C
#56683C

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#3C6863
#3C6863

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#4D3C68
#4D3C68

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Nearest named colors to #663B3F

The closest officially registered color names in the Register, ordered by similarity — your shade’s neighborhood is already being claimed.

Purple Brown color link
Purple Brown

#673A3F

Solar Flare color link
Solar Flare

#693E40

Brunette color link
Brunette

#634041

Lexington color link
Lexington

#683E37

Tawny Port color link
Tawny Port

#643A48

Matchmaker color link
Matchmaker

#6D3540

Double Lumberjack color link
Double Lumberjack

#633E36

Sanguine Brown color link
Sanguine Brown

#6C3736

Catawba color link
Catawba

#703642

Purplish Brown color link
Purplish Brown

#6B4247

Deep Coffee color link
Deep Coffee

#704241

Old Mauve color link
Old Mauve

#673147

#663B3F color backgrounds & wallpapers

Download color wallpaper / background for your Desktop PC, Tablet or Mobile phone.

#663B3F color image #663B3F color ORCN HD wallpaper 3840x2160 (Desktop)
#663B3F color image #663B3F color ORCN HD wallpaper 1170x2532 (Mobile)
#663B3F color image #663B3F color solid HD wallpaper 3840x2160 (Desktop)
#663B3F color image #663B3F color solid HD wallpaper 1170x2532 (Mobile)

Conversions between color systems and etc.

  • HEX#663B3F
  • RGB102, 59, 63
  • CMYK0, 17, 15, 60
  • CSSrgb(102, 59, 63)
  • HSL354°, 27%, 32%
  • HSL Precise354.419°, 26.708%, 31.569%
  • HSV354°, 42%, 40%
  • HSB354°, 42%, 40%
  • Normalized R (0.0–1.0)0.400
  • Normalized G (0.0–1.0)0.231
  • Normalized B (0.0–1.0)0.247
  • GLSLvec3(0.400, 0.231, 0.247)
  • GLSL with alphavec4(0.400, 0.231, 0.247, 1.000)
  • HLSL / Metalfloat3(0.400, 0.231, 0.247)
  • Percentage of Red in RGB40%
  • Percentage of Green in RGB23.1%
  • Percentage of Blue in RGB24.7%
  • Color FamilyRed
  • Saturation FamilyMild Saturation
  • Lightness FamilyNeutral
  • HEX ID663B3F
  • DECIMAL ID6699839
  • Name LengthThis color has no name
  • Seen by search & AI crawlers16 times
  • Counting from2025-01-01

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ORCN is an independent private organisation that maintains a public register — not a governmental institution or an international standards organisation — in which a name is linked to a specific digital colour code. Registration gives the registrant the exclusive right, within the ORCN register, to have that name recorded against that colour code.

Important: a digital colour itself belongs to no one in law. That right exists only within the ORCN register: registration creates no ownership, trademark, copyright or design rights anywhere. Legal exclusivity outside the register, where it is available at all, arises separately under applicable trademark law and is generally limited to particular goods, services and jurisdictions.