Comments:ССЕ 276. Werner 2, 221, 442 <*sʌj / *sʌn>, with a lot of confusion. Kott šueŋa "blue" is identified with Kott. šujaŋa (Bol) "grey", although the latter is certainly a form of the word recorded by Castren as šui "yellow" and as such is to be compared with Pump. tul-si "yellow" and Ket sulemam "yellow" (М., Сл.). In PY we can safely distinguish between *son- (perhaps *sǝn-) 'blue, green', *suŕ 'yellow, grey' and *sur "red, blood", while lumping them together under a pseudoprotoform *sʌj / *sʌn hardly brings us anywhere.