1. Here's how
Colors in hexadecimal format from a source outside Lumion can be copied and pasted into any of the Color Selection Windows in Lumion.
1.1: Please click on the link below if you need to convert an RGB color to a hexadecimal color:
External Link: Colorpicker
1.2: Press CTRL + C to copy the highlighted hexadecimal color in text format, e.g. "FF0000" (red):
Lumion 7.5 and older: Make sure you only copy the 6 digits/letters - do not include any other characters such as a hashtag (#).
1.3: Move the mouse cursor to the solid bar at the right side of the Color Selection Window in Lumion and press CTRL + V to paste the color.
Video Tutorial: Materials: Copy-Paste Colors From Other Software