x1 is white/very-light colored [color adjective].
Pale forms of other colors are a compound of white; e.g. pink (= labyxu'e, xunblabi) (whereas kandi is used for pale = dimness, lack of intensity). See also skari, xekri, grusi, kandi, manku, carmi, bakri, blanu, bunre, cicna, crino, narju, nukni, pelxu, xunre, zirpu.