Colourless file icons on desktop

When Office and PDF files are saved to my desktop, the file icons appear non-descript and lacking the colourful design normally associated with the application software.

The same files when saved into a folder take-on the desired icon design. Something appears to be disconnected - does anyone have a solution?

Many thanks

Finder > Show View Options

uncheck Show Icon Preview

counter-intuitive, but I believe that should fix the problem

Many thanks - Tried your suggestion without success - desktop file icons still lacking colour but miraculously take on colour when saved into a folder

Any other suggestions

Look at Show View Options settings in the folder. Make the settings for Finder the same until you find the magic setting. Then you can revert to other settings for the ones that didn't affect the color if you wish.

Bingo!
Colour restored - many thanks for your recommendations

Glad you got it sorted. If you see this post, would you mind indicating what you believe did the trick?