Information about #666666 color
Basic facts about this digital color
#666666 presents itself as a quiet, subdued grey — one that sits on the lighter side of the spectrum. In practice it works well for balanced palettes where no single element should shout. In The Official Register of Color Names it is practically indistinguishable from Granite Gray (#676767). Nearby in the Register you will also find Double Trojan (#656664) and Chicane (#686765).
Technically, #666666 is a perfectly balanced RGB mix — red, green and blue all sit at 102, which is what makes it a true neutral. On this background, white text reaches a 5.7:1 contrast ratio (passing WCAG AA); black stays at 3.7:1. For print, note the heavy black component (K:60) — ink coverage matters with tones this deep. This shade is reserved in the Register and is not available for naming.
#666666 color variations
View this color variations of tints, shades, tones and hues.
#666666 color tints
Tints look brighter, pastel, and less intense.
#666666 color shades
Shades look darker, richer, and more solid.
#666666 color tones
Tones looks more sophisticated and complex than base colors.
Why this page shows fewer blocks
#666666 belongs to the Greyscale Color Family, and greyscale colors have no hue. Hue is an angle on the color wheel, and that angle only exists when a color leans toward one primary more than the others. Here all three channels are equal (R = G = B), so there is nothing to lean and no angle to measure.
Everything built on rotating that angle therefore has nothing to rotate. A complementary color is the hue 180° away — for a grey, that is the same grey. The same goes for analogous, triadic, tetradic and square harmonies. Rather than show seven identical swatches, the register leaves the Hues variation strip and the whole Harmonies section out.
What remains is everything that depends on lightness rather than hue. Tints, shades and tones still work, because they move the color up and down the scale instead of around the wheel. So do the nearest named colors, the conversions and the adjacent color codes.
How the register classifies colors · All greyscale colors in the register
Alternatives to #666666 color
View adjacent and very similar colors.
Nearest named colors to #666666
The closest officially registered color names in the Register, ordered by similarity.
#676767
#656664
#686765
#646463
#6A6466
#696969
#696268
#656660
#61666B
#6D6968
#666A6D
#6E6767
#666666 color backgrounds & wallpapers
Download color wallpaper / background for your Desktop PC, Tablet or Mobile phone.
Conversions between color systems and etc.
- HEX#666666
- RGB102, 102, 102
- CMYK0, 0, 0, 60
- CSSrgb(102, 102, 102)
- HSL0°, 0%, 40%
- HSL Precise0°, 0%, 40%
- HSV0°, 0%, 40%
- HSB0°, 0%, 40%
- Normalized R (0.0–1.0)0.400
- Normalized G (0.0–1.0)0.400
- Normalized B (0.0–1.0)0.400
- GLSLvec3(0.400, 0.400, 0.400)
- GLSL with alphavec4(0.400, 0.400, 0.400, 1.000)
- HLSL / Metalfloat3(0.400, 0.400, 0.400)
- Percentage of Red in RGB40%
- Percentage of Green in RGB40%
- Percentage of Blue in RGB40%
- Color FamilyGreyscale
- Saturation FamilyDesaturated
- Lightness FamilyLight
- HEX ID666666
- DECIMAL ID6710886
- Name LengthThis color has no name
- Seen by search & AI crawlers80 times
- Counting from2025-01-01
