You can play wityh this code snippet
(setq accol (vla-get-truecolor atable))
(vla-setrgb accol 16 37 66)
(vla-put-truecolor atable accol)
(vla-setrgb accol 82 0 0)
(vla-setcellcontentcolor atable row col accol)
same way with
vla-setcellbackgroundtcolor
_____________________________________
C6309D9E0751D165D0934D0621DFF27919