▁size ▁and ▁weight . ▁ ▁King ▁of ▁Jazz ▁was ▁the ▁nin ete enth ▁all - t alk ing ▁motion ▁picture ▁fil med ▁entirely ▁in ▁two - color ▁Techn icol or ▁rather ▁than ▁simply ▁including ▁color ▁sequences . ▁At ▁the ▁time , ▁Techn icol or ' s ▁two - color ▁process ▁employed ▁red ▁and ▁green ▁d yes , ▁each ▁with ▁a ▁dash ▁of ▁other ▁colors ▁mixed ▁in , ▁but ▁no ▁blue ▁d ye . ▁King ▁of ▁Jazz ▁was ▁to ▁show case ▁a ▁spect ac ular ▁presentation ▁of ▁George ▁G ers h win ' s ▁R haps ody ▁in ▁Blue , ▁so ▁this ▁presented ▁a ▁problem . ▁Fort un ately , ▁the ▁green ▁d ye ▁Techn icol or ▁used ▁can ▁actually ▁appear ▁pe ac ock ▁blue ▁( cy an ) ▁under ▁some ▁conditions , ▁but ▁acceptable ▁results ▁in ▁this ▁case ▁would ▁require ▁very ▁careful ▁handling . ▁Art ▁director ▁H erman ▁Ros se ▁and ▁production ▁director ▁John ▁Murray ▁Anderson ▁came ▁up ▁with ▁solutions . ▁Test s ▁were ▁made ▁of ▁various ▁fab rics ▁and ▁p ig ments , ▁and ▁by ▁using ▁an ▁all ▁gray - and - sil ver ▁background ▁the ▁bl u ish ▁aspect ▁of ▁the ▁d ye ▁was ▁set ▁off ▁to ▁best ▁advantage . ▁Fil ters ▁were ▁also ▁used ▁to ▁inject ▁pale ▁bl ues ▁into ▁the ▁scene ▁being ▁fil med . ▁The ▁goal ▁was ▁to ▁produce ▁a ▁finished ▁film ▁with ▁past el ▁sh ades ▁rather ▁than ▁bright ▁colors . ▁Nevertheless , ▁as ▁it ▁appears ▁in ▁an ▁original ▁two - color ▁Techn icol or ▁print ,