Hi Geert,
Thank you very much for a quick response. It seems that sparx will never stop to amazing me

Setting default color resolved the problem. But here is the story.
When you are extending custom stereotype, like Archimate you get:
- the right color in a toolbox
- the right icon in an element on a diagram
- the right shape on a diagram
but not the right color on a diagram.
Another funny thing is how you set up the right color. Instead of some special attribute on the element in your profile you need to choose it from the context menu and actually set up the default color of the inherited stereotype. Same with page order in a toolbox, instead of special attribute you're using Z-order from the context menu. Why this is must be so complicated?

Anyway thanks again for the prompt answer and maybe one more question.
Is there any other way to see the results of profile changes than:
1. Exporting profile + toolbox
2. Creating MDG (with the profile and the toolbox)
3. Importing MDG to a model
?
P.S. I hope that I'm extending Archimate stereotype correctly. Base metaclass is used when you want to add your extended stereotype to a toolbox (another unexpected behavior).