How about intercepting CHROUT print routine and fixing the color value:
C000 LDA #$0B#$0C C002 STA $0326 C005 LDA #$C0 C007C008 STA $0327 C00AC00B RTS C00BC00C PHA C00CC00D LDA #$01 ; SET COLOR HERE C00EC00F STA $0286 C011C012 PLA C012C013 JMP $F1CA SYS49152