FVWM: color for pixmap on root

[Jamie Griffin]

Hi

I use FvwmBacker to set the root backgrounds, on some of the desktops I 
use a pixmap image that is tiled. I would like to be able to add a 
colour of choice to the pixmap, to give it a tint-like effect.

I've got a colorset set up with the usual stuff like $bg, $fg, 
TiledPixmap, Transparent and of course specifying the pixmap path as I 
understood from the manpage this might be the way to achieve adding 
colour to a pixmap image. Is does not work that way i've found.

How might I be able to do this? Will I need to use another program like 
fvwm-root or xsetroot (to add a base colour for example, to do it?

I would like to be able to do this so when I change colour schemes this 
effect can be a part of that.

Thank you.