Hi marissea, welcome to AF!

Unfortunately no, there is no way to configure the theme/font/bubbles etc of the stock app, you'd need to download one of the 3rd Party SMS apps like Handcent, or Pansi.

 

With Go SMS you'd be able to change bubble & font colors.

 

I use GOSMS and there a zillion different themes you can download to change the bubbles and colour.

 

Hi Marissea,

You CAN change the default look of sms on the HTC one.

Go to the Messages (all messages view) click the 3 vertical dots in the top right.

Then go to settings and General. Scroll to the bottom and you'll find the settings you want under the title 'Personalize'.

Enjoy

 

in the sense 4+ and android 4.1.1. update, there is definitely the option to change the theme of the bubbles and the background. Just follow the instructions Rdvp gave right above me. Don't know if you can change the text however.