normally i ignore this forum but you used full sentences and posted in the correct forum so why not
you can do a lot of different stuff with html text formatting. this link:
http://www.w3schools.com/html/html_formatting.asp explains a lot of them
just remember that the format is
<tag>text</tag> so you need to open and close all of your tags surrounding your text. for example
<b>bold text</b> and
<i>italic text</i>you can use the font tag to change the color, for example
<font color="#ff0000">red text</font>. it's as simple as that. if you need help figuring out the hex value for a color (the ff0000 in that example) this site:
http://www.immigration-usa.com/html_colors.html has the list of web-safe colors. just replace ff0000 with the value on the chart for the color you want.
there are a lot better (but more complicated) ways to do text formatting, mainly css. but this may be the best way since you are a beginner. when you progress and feel that you want to move on to css w3schools has great tutorials and we can as always help with specific questions