Something I’m endlessly frustrated by is having to work around the way Nuke uses confusing hex colour values in Python to do things such as set a node’s ’tile_color’ knob. For example, how are we supposed to remember that 0xff000ff = green? I wrote two simple functions to get around this, which I hope you can make use of too…
def hex_color_to_int(hexValue): return int(hexValue+'00', 16)
The hexValue argument still expects a hexadecimal colour value, although rather than an arbitrary string of characters, you can input a web-based colour which is easily found by Googling “hex colour picker”. For example, I can sample a gold colour as #ffd700 from Google, and then set the ’tile_color’ knob on a selected node with the following:
nuke.selectedNode()['tile_color'].setValue(hex_color_to_int('ffd700'))
Similarly, if you prefer to just use float values like in Nuke’s RGB sliders, this works great:
def hex_color_to_rgb(red, green, blue):
return int('%02x%02x%02x%02x' % (int(red*255),int(green*255),int(blue*255),255),16)
…and then setting ’tile_color’ with:
nuke.selectedNode()['tile_color'].setValue(hex_color_to_rgb(1,0.6,0))
This one works by converting the strange hex colour to RGB values (0 to 255) and using our 3 arguments to multiply red, green and blue values in a way a Compositor would find more intuitive. Regardless of your favourite method, either option is far simpler and more controllable!