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What is ACB? ACB, short name for Adobe Color Book, is used as the file extension for Adobe Color Book files. .ACB files are binary files that can be opened by Adobe applications. See the sample .ACB file included below.

File Extension: .ACB

MIME Type: application/octet-stream

File Content: Adobe Color Book

.ACB files are Adobe Color Book files saved as binary files. Here are the first 128 bytes of a sample .ACB file, "ANPA Color.acb", dumped in HEX values:

38 42 43 42 00 01 0b b8 00 00 00 23 00 24 00 24 8BCB............
00 24 00 2f 00 63 00 6f 00 6c 00 6f 00 72 00 62 .....c.o.l.o.r.b
00 6f 00 6f 00 6b 00 2f 00 41 00 4e 00 50 00 41 .o.o.k...A.N.P.A
00 2f 00 74 00 69 00 74 00 6c 00 65 00 3d 00 41 ...t.i.t.l.e...A
00 4e 00 50 00 41 00 20 00 43 00 6f 00 6c 00 6f .N.P.A...C.o.l.o
00 72 00 00 00 1f 00 24 00 24 00 24 00 2f 00 63 .r.............c
00 6f 00 6c 00 6f 00 72 00 62 00 6f 00 6f 00 6b .o.l.o.r.b.o.o.k
00 2f 00 41 00 4e 00 50 00 41 00 2f 00 70 00 72 ...A.N.P.A...p.r

.ACB Adobe Color Book file sample: Click sample.acb to download.