Information about #666C6C color

#666C6C color image

Basic facts about this digital color

In the Register's classification, #666C6C belongs to the Cyan Color Family, featuring Desaturated and Light brightness. In numbers: rgb(102, 108, 108) (40% red, 42.4% green, 42.4% blue), or CMYK 2 / 0 / 0 / 58 for print. New to color codes? See our guide to RGB color codes.

#666C6C presents itself as a quiet, subdued grey — one that sits on the lighter side of the spectrum. In practice it works well for understated, calm designs that favor harmony over drama. In The Official Register of Color Names it is almost identical to Mid Grey (#666A6D). Nearby in the Register you will also find Nevada (#666F6F) and Quarter Tuna (#656A70).

Technically, the mix leans on its green channel (rgb(102, 108, 108)), which gives #666C6C its character. If you plan to put text on a #666C6C background, choose white — the contrast ratio is 5.3:1 (passing WCAG AA), while black manages only 3.9:1. #666C6C has no official name yet. If this shade means something to you, you can be the one to name it.

#666C6C color variations

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

#666C6C 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 #666C6C

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

Mid Grey color link
Mid Grey

#666A6D

Nevada color link
Nevada

#666F6F

Quarter Tuna color link
Quarter Tuna

#656A70

Pale Sky color link
Pale Sky

#636D70

Dim Gray color link
Dim Gray

#696969

Scarpa Flow color link
Scarpa Flow

#6B6A6C

Granite Gray color link
Granite Gray

#676767

Traffic color link
Traffic

#6C6D68

Corduroy color link
Corduroy

#606E68

Shuttle Grey color link
Shuttle Grey

#61666B

Cloudy Gray color link
Cloudy Gray

#6D6968

Conversions between color systems and etc.

  • HEX#666C6C
  • RGB102, 108, 108
  • CMYK2, 0, 0, 58
  • CSSrgb(102, 108, 108)
  • HSL180°, 3%, 41%
  • HSL Precise180°, 2.857%, 41.176%
  • HSV180°, 6%, 42%
  • HSB180°, 6%, 42%
  • Normalized R (0.0–1.0)0.400
  • Normalized G (0.0–1.0)0.424
  • Normalized B (0.0–1.0)0.424
  • GLSLvec3(0.400, 0.424, 0.424)
  • GLSL with alphavec4(0.400, 0.424, 0.424, 1.000)
  • HLSL / Metalfloat3(0.400, 0.424, 0.424)
  • Percentage of Red in RGB40%
  • Percentage of Green in RGB42.4%
  • Percentage of Blue in RGB42.4%
  • Color FamilyCyan
  • Saturation FamilyDesaturated
  • Lightness FamilyLight
  • HEX ID666C6C
  • DECIMAL ID6712428
  • Name LengthThis color has no name
  • Seen by search & AI crawlers307 times
  • Counting from2025-01-01