What is really confusing in the animal world is that often the color names do not match what comes to mind, at least to the average person or newcomer. Also what is called lavender or blue or silver in one breed or type of animal does not necessarily look the same in another breed or type of animal, tho from what I can see, the genetics of the color are usually similar (blue and lavender being dilutes,ect.) I'm having a hard time figuring out some of the different chicken feather colors and it would be helpful to have some photos to show the difference between red, mahogany, red-brown, ect.....
The only way I know of to understand the colors is to go to shows and see actual birds. Lavender is not used by the ABA/APA as a color description for chickens. It is used online only. Both clubs use self blue for what some people call lavender. Photo's are not the best way to see colors as our monitors all show colors differently. People argue with me about this, but go into a Best Buy or any appliance store and look at all the monitors on the wall and you will see that they are not showing color in the same hues.
Monitors can be calibrated to show color faithfully, but the software costs thousands of dollars.
Walt