Information about #646663 color

#646663 color image

Basic facts about this digital color

In the Register's classification, #646663 belongs to the Chartreuse Color Family, featuring Desaturated and Neutral brightness. The mix behind it: rgb(100, 102, 99) — 39.2% red, 40% green, 38.8% blue; the print equivalent is CMYK 1 / 0 / 1 / 60. Curious how these numbers work? Read our RGB color codes guide.

The color #646663 reads as a muted, almost neutral grey and sits comfortably between light and dark. Expect to see shades like this in understated, calm designs that favor harmony over drama. In The Official Register of Color Names it is almost identical to Double Trojan (#656664). Nearby in the Register you will also find Storm Dust (#646463) and Triple Stack (#656660).

In RGB terms — rgb(100, 102, 99) — the green channel does the heavy lifting here. If you plan to put text on a #646663 background, choose white — the contrast ratio is 5.8:1 (passing WCAG AA), while black manages only 3.6:1. On paper it relies strongly on black ink (K:60), so proof dark layouts before a large print run. Out of 16,777,216 possible colors, #646663 is still unnamed — it can be claimed and named in The Official Register of Color Names.

#646663 color variations

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

#646663 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

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

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

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

Tetradic

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

Tetradic color scheme

Square

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

Square color scheme

Nearest named colors to #646663

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

Storm Dust color link
Storm Dust

#646463

Triple Stack color link
Triple Stack

#656660

Chicane color link
Chicane

#686765

Granite Gray color link
Granite Gray

#676767

Scorpion color link
Scorpion

#6A6466

Salt Box color link
Salt Box

#696268

Half Masala color link
Half Masala

#67635C

Double Tapa color link
Double Tapa

#6A6A5F

Dim Gray color link
Dim Gray

#696969

Shuttle Grey color link
Shuttle Grey

#61666B

Conversions between color systems and etc.

  • HEX#646663
  • RGB100, 102, 99
  • CMYK1, 0, 1, 60
  • CSSrgb(100, 102, 99)
  • HSL100°, 1%, 39%
  • HSL Precise100°, 1.493%, 39.412%
  • HSV100°, 3%, 40%
  • HSB100°, 3%, 40%
  • Normalized R (0.0–1.0)0.392
  • Normalized G (0.0–1.0)0.400
  • Normalized B (0.0–1.0)0.388
  • GLSLvec3(0.392, 0.400, 0.388)
  • GLSL with alphavec4(0.392, 0.400, 0.388, 1.000)
  • HLSL / Metalfloat3(0.392, 0.400, 0.388)
  • Percentage of Red in RGB39.2%
  • Percentage of Green in RGB40%
  • Percentage of Blue in RGB38.8%
  • Color FamilyChartreuse
  • Saturation FamilyDesaturated
  • Lightness FamilyNeutral
  • HEX ID646663
  • DECIMAL ID6579811
  • Name LengthThis color has no name
  • This page visited0 times
  • Counting from2025-01-01