1 Subjects: “...indigoid colorants...”

2 Subjects: “...color image encryption...”

3 Subjects: “...colorful minibus...”

4 Subjects: “...XYZ color plane...”

5 Subjects: “...True Color imagery...”

6 Subjects: “...roof tile color...”

7

8 “... by the constant efforts of experimental archeology. A working hypothesis about the causes of the color differences...”