Its known that if you try to glance on anything which has high contrats i.e. like black over white or some dark colour over another bright colour, its difficult to keep the eye steady on it.

Same way, when people reach to your site to read your ideas, articles etc ,  a bad contrast of your site can make them leave sooner than even calculated values on stats.

Good news is that you dont need a designer to higher but you can use Check My colour online service which takes the URL of your webpage and gives a free report on site contarts levels of  different elemts like image, text or any CSS you had used.

It basically checks foreground and background color combinations of all DOM elements and determining if they provide sufficient contrast when viewed by someone having color deficits.

This done you can now sit and find a solution to get the right colour combincation. The best part of this was the sample which gives a real time scenario.  Also you get to know the colour code and HTML tags.