Top-left color (black) location is unknown

Colors every 8 bytes: [RR GG BB ??(x5)]
Starting at offset 0xE746:
 _ _ _ _ _ _ _ _ _ _
|_|0|1|2|3|4|5|_|_|_|
|_|_|_|_|_|_|_|_|_|_|

Colors every 24 bytes: [RR GG BB ??(x21)]
Starting at offset 0xE7D2:
 _ _ _ _ _ _ _ _ _ _
|_|_|_|_|_|_|_|0|1|2|
|3|4|5|_|_|_|_|_|_|_|

Colors every 15 bytes: [RR GG BB ??(x12)]
Starting at offset 0xE85C:
 _ _ _ _ _ _ _ _ _ _
|_|_|_|_|_|_|_|_|_|_|
|_|_|_|0|1|2|3|4|5|_|

Bottom-right color (lavender) stored at 0xE8B6