I want to color each atom, which is a TAD, according to its genes’ expression value.

My code writes a Chimera marker file because it has RGB variables (shown below, the lower the gene expression, the lighter the shade of green). However, ChimeraX shows the entire model in the same color. How should I color each atom (TAD) according to its gene expression level?

Thank you. 

Best regards,

Zichen “Cardiff” Jiang