Transparency in heatplot

[Felix Bittmann]

I am using Ben Jann's heatplot and I would like to have the entire graph transparent to some degree (like 50%). However, I am not sure where to include this option in the code. I know it works, because it does so when I adjust it manually afterwards. I would like to be the background grid to be partially visible through the colours. A simple example:

webuse nhanes2, clear
hexplot weight height

Thanks!

[Andrew Musau]

heatplot is from SSC (FAQ Advice #12).

webuse nhanes2, clear
set scheme s1color
hexplot weight height, color(hcl diverging, opacity(30))

[Felix Bittmann]

Thank you Andrew, much appreciated! I forgot the "," in the parentheses with the standard theme, so I messed it up there...