I'm going with
RUBY 1Dn (clued at 24)
CHERRY 24 (clued at 1dn)
20 (clued at 25Ac) ROSE
PINK 25AC (clued at 20)
12 CRIMSON (clued at 34)
MAROON 34 (clued at 12)
15 (defined at 22) SCARLET
RED 22 (defined at 15Dn)
The image you end up with is the same as the CH flag, with the colours swapped around.
The theme describes a colour each associated entry has in common, plus what they do when entered (symmetrically)