Themes

Hi all,

Is there a way to make the color of the submit-button, the same as the right (cancel) button?
I have a screenshot attached to show what I mean.

I ran through all the settings of our colour scheme and found that no setting had the blue colour as the submit button. 
Could this be a bug or could someone point me where to find the settings for changing this? 

Thanks in advance!

Kind regards,

Menno