other Haeckel Sphere variations
Here are some other coloring schemes which didn't seem noteworthy enough to warrant including in either of the sets that I curated. See Haeckel Sphere Set #1 and Haeckel Sphere Set #2 for my favorite variations.
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12-color mixed Haeckel Sphere
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12 dissimilar pieces.

For each of the 5 symmetrical solutions, the position of each color relative the the other ones is predetermined.
PIECE COLORING
color 1color 2color 3color 4color 5
piece 117329
piece 2156312
piece 3191145
piece 4110467
piece 511221110
piece 6236411
piece 7284109
piece 8212768
piece 937548
piece 103811912
piece 115712910
piece 125101186
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12-color solid Haeckel Sphere
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this is perhaps the easiest version out of them all, because it helps you see each individual piece as its own solid color.

12 dissimilar pieces, each one a different solid color.

There is no color symmetry possible with this puzzle. The only variations you can do are deciding which colors to put next to each other.
PIECE COLORING
color 1color 2color 3color 4color 5
piece 111111
piece 222222
piece 333333
piece 444444
piece 555555
piece 666666
piece 777777
piece 888888
piece 999999
piece 101010101010
piece 111111111111
piece 121212121212
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2-color dipped Haeckel Sphere
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4 types of pieces, 3 of each kind. Half of them are solid color pieces.
PIECE COLORING
color 1color 2color 3color 4color 5
piece 111111
piece 211111
piece 311111
piece 422222
piece 522222
piece 622222
piece 711122
piece 811122
piece 911122
piece 1022211
piece 1122211
piece 1222211
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2-color polar Haeckel Sphere
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2 types of pieces, 6 of each.
PIECE COLORING
color 1color 2color 3color 4color 5
piece 111122
piece 211122
piece 311122
piece 411122
piece 511122
piece 611122
piece 722211
piece 822211
piece 922211
piece 1022211
piece 1122211
piece 1222211
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4-color dipped Haeckel Sphere
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4 types of pieces, 1 each of each solid color, and 5 each of mirrored bi-colors
PIECE COLORING
color 1color 2color 3color 4color 5
piece 111111
piece 211232
piece 311232
piece 411232
piece 511232
piece 611232
piece 744323
piece 844323
piece 944323
piece 1044323
piece 1144323
piece 1244444
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6-color checkered Haeckel Sphere
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This is very similar to, but slightly easier than the 5-color version

12 dissimilar pieces with a logical coloring system.

There are chiral pairs possible for each of the 5 symmetrical solutions, so that make 10 solutions total.
PIECE COLORING
color 1color 2color 3color 4color 5
piece 112623
piece 212624
piece 312625
piece 413632
piece 513634
piece 613635
piece 714642
piece 814643
piece 914645
piece 1015652
piece 1115653
piece 1215654
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6-color cubic Haeckel Sphere
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12 dissimilar pieces with a somewhat logical coloring system.

The position of each color relative the the other ones is somewhat predetermined, yet there are chiral pairs possible for each of the 5 symmetrical solutions, so that make 10 solutions total.
PIECE COLORING
color 1color 2color 3color 4color 5
piece 111133
piece 211144
piece 322233
piece 422244
piece 533355
piece 633366
piece 744455
piece 844466
piece 955511
piece 1055522
piece 1166611
piece 1266622
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Solid Color Haeckel Sphere
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    12
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    1
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    5
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    4
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    2
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    3
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    2
Every piece is identical so there is no color symmetry aspect associated with this version of the puzzle.
PIECE COLORING
color 1color 2color 3color 4color 5
piece 111111
piece 211111
piece 311111
piece 411111
piece 511111
piece 611111
piece 711111
piece 811111
piece 911111
piece 1011111
piece 1111111
piece 1211111
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