How to change a part of header text colors

[Makoto]

Hi, I'm trying to change a part of header text colors.
But, the following code doesn't work.
I tried...

Would you give me some advice?

[obullei]

Hello!

Please take a look here:
http://devcenter.appery.io/documentat...

[Makoto]

Hi Arina,
thank you for your reply.
I tried the following code.
Although it wasn't reflected on my simulator screen(I don't know the reason), it did work on my mobile phone.
Thank you!