Making sure you use the correct Color is of utmost importance.
Here is a great site to help you get the right Color and Code.

Choose Your Color – it will provide you with the Color Code
Upload Your Image – it will provide the Color Code from your selection
Convert Between Color Formats (HEX, RGB, HSL, HSV, CMYK) by inserting color code in format you have
Understanding Color Names – Grouped by Main Colors then Shades