Download that cleo script
Download sanny builder, locate gta sa directory.
Open downloaded cleo script with sanny builder.
Go to line: 65
Should be this text" 0340: set_text_draw_RGBA 0 255 0 255 " - without quotes.
RGBA 0 255 0 255 means that color is green as we can see here: http://i.imgur.com/QhaKGUq.png
Go here to pick color: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Colors/Color_picker_tool
Pick your color but i suggest you to use this color: http://i.imgur.com/Uc9Mta3.png - RGBA 0 0 255 255
So change "0340: set_text_draw_RGBA 0 255 0 255" to "0340: set_text_draw_RGBA 0 0 255 255"
Should look something like this: http://i.imgur.com/EIyJq5X.jpg
Hold CTRL+S on keyboard to save file and press F7 to compile it from txt to .cs and make sure you paste it to CLEO directory.
You can download mine from attachments if you do not understand what i wrote above.