grusi -rus- gismu

x₁ is gray [color adjective].

In notes:

blabi: x₁ is white/very-light colored [color adjective].
carmi: x₁ is intense/bright/saturated/brilliant in property (ka) x₂ as received/measured by observer x₃.
kandi: x₁ is dim/dull/pale/non-intense in property x₂ (ka) as received/measured by observer x₃.
skari: x₁ is/appears to be of color/hue x₂ as perceived/seen by x₃ under conditions x₄.
xekri: x₁ is black/extremely dark-colored [color adjective].
rusyzilska: x₁ is the abstract color gray