It is always a problem for me to assign a certain color to a main hue. If you struggle also with this because of your color blindness, Color Name & Hue might help you.

With this little tool you can either enter RGB (Red-Green-Blue) values, HSB (Hue-Saturation-Brightness) numbers or a hexadecimal code for a color, to find its closest match of a named color and its corresponding hue. It is also possible to just use the sliders to see how color hues are changing. The list of colors comprises 1640 different color names extracted from several sources on the web.