[Unexplained fading of colors]

Excellent, that's fixed it! Many thanks for your help.

[Unexplained fading of colors]

Hi All,

 

I am using paint.net today as I have many time before. For some odd reason today, everything I draw comes out faded. A black line looks grey, a red box looks pink.

 

I've checked my layer transparencies and effects but cannot see anything causing this. Are there any ideas on what I might be missing?

 

Many thanks.