If you're having trouble with colors, make sure your hex value uses a #, that there is a space between the = and the hex value, and that all of the letters in your hex value are lowercase.
{{Country |themecolor = |textcolor = |bordercolor = |infoboxbackground = |title = |image = |caption = |motto = |anthem = |population = |capital = |largest = |languages = |demonym = |system = |legislature = |leaders = |govagencies = |land = |sea = |coords = |organisations = |founded = |existence = |status = |currency = |religions = |ethnic = |gdp = |gdppc = |hdi |timezone = |driving = |calling = |tld = }}