How do I change the default font size and color for rich text input form in SharePoint?

[T_Masaru]

The default font size for rich text input form in SharePoint seems much too small. How do I change the default settings?

[#2]

If you are talking about SP 2010, only way to change this size is by means of JS/CSS customization...as an alternative you could try InfoPath

[#3]

@Juan Carlos González Martín 

Thank you. Yes, I'm using SP2010. Do you know how to change the CSS code? What code should I add?