Unmoving, like bedrock, a pale grey that will not budge.
Rock Solid is a light grey.
It can be described as light, pale and neutral.
Set in black, because black reads best on it.
Rock Solid is the thirteenth studio album by the Commodores, released in 1988. At this time in the band's career, hits were no longer forthcoming, and this album failed to enter the Billboard albums chart. The single, "Solitaire", reached No. 51 on the R&B chart. It is the last of the band's albums with keyboard player and founding member Milan Williams, who was fired after a dispute about playing in South Africa.
Read on WikipediaSolid is a state of matter in which atoms are closely packed and are difficult to move past each other. Solids resist compression, expansion, or external forces that would alter its shape, with the degree of resistance being dependent upon the specific material under consideration. Solids also always possess the least kinetic energy per atom/molecule relative to other phases or, equivalently stated, solids are formed when matter in a fluid phase is cooled below a certain temperature. This temperature is called the melting point of the substance and is an intrinsic property; i.e. independent of how much of the matter there is. The vast majority of substances, when in the solid state, can be arranged in one of a few ubiquitous structures.
Read on WikipediaAdjective