Thanks for your reply.

> The effects of changing the colors is exacerbated in your case by the
> fact that you use a bold face for some of the faces.  

The changes is really annoying. In my opinion, a bold type font for keywords 
and variable name is just too common in modern editor using a large monitor.
With the regular font style, it’s difficult to read the code.

> On 20 Aug 2016, at 16:15, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> Regardless of what Alan, the developer of the C++ mode says about
> this, I think you can avoid at least some of the unpleasant effects of
> this in your setup if you activate stealth fontification by setting
> jit-stealth-time to some non-nil value, like 0.1. 


Do you mean jit-lock-stealth-time ?

I set it to 0.1 (even 0.8) and nothing changes.

Thanks.