More Mig 21 questions

Two Mig 21 related questions. (1) What color are FAB 250 bombs? Looks like opions are grey, black, or a yellowish tan. Looking for North Korean / late 60s. (2) Eithiopian Mig-21R?? Saw a build of a 21R with Eithiopian markings. I know they have/had about 20-30 MiG 21s (Bis?). Did they have Rs OR did the Soviets possibly seretly operate the type in Eithiopian colors for elint gathering in the area?

There were some Soviet “Honchos” that operated in the area .