thats just a floating value representation, in the end its stored as a 8bit short value (integer from 0-255).
What unity does in the background is simply multiplying that number with 255 and convert it to a integer value.
For web development especially in the area of Flash Hexadecimal values are very speedy to work with because you don't have to copy and paste multiple entries but just 1 string to represent 24 and or even 32 bit color values, like 0FFF006C1 for a solid pink. They also work great in After Effects, Photoshop and Dreamweaver. Unfortunately many other industry applications haven't yet fully adopted that model like 3dsmax. In that case you always have to swap applications and copy paste all 3 RGB/A values over.
it depends on the app and if it supports it, otherwise you are right its just 6 for the RRGGBB. The first 2 of the 8 digits are the alpha value.
But I guess hex values don't matter much here since autodesk doesn't know about them in their apps.
, veteran polycounter, 3,037 Posts, Join Date Mar 2008, Location Sydney Australia