I’ve read around that color theorists and designers in fashion or computer graphics have coined phrases based around what colors shouldn’t go together. A couple of them are:”Red and Green Should Not Be Seen” and “Blue and Green Should Never Be Seen without Something in Between”. I am a newbie so I’m not sure if this applies in all cases any opinions on this?

There's no hard and fast rule about what colours you can use, that's really up to your judgement and design sense. A lot of designers could come up with a red and green design that looks fantastic!

Some colours don't match the site or it's content sometimes. For instance, a mostly black look wouldn't suit this site but it might be ideal for a goth rock bands site.

Red on green is banned because of the colour blind (I believe it is the most common type), otherwise you should look at Adobe Kuler and see this thread
http://www.webmaster-talk.com/graphi...ry-theory.html
and the one I list there, http://www.webmaster-talk.com/graphi...or-theory.html.

Originally Posted by brad1985

I’ve read around that color theorists and designers in fashion or computer graphics have coined phrases based around what colors shouldn’t go together. A couple of them are:”Red and Green Should Not Be Seen” and “Blue and Green Should Never Be Seen without Something in Between”. I am a newbie so I’m not sure if this applies in all cases any opinions on this?

Basically, use a dark background w/ light coloured text and dark coloured text on a light background. The choice is all you after that! That's the only way to choose safely, otherwise, make sure you know who your designing for. Otherwise, they might go color blind, if they aren't already.

Learn the color wheel and how it works. Easiest way.

anything color that blends with each other is always a No No. Something like black background with dark green text, that kind of hard to read

About the whole red and green thing,

I would never use #ff0000 and #00ff00 together

but here's a few red and green palettes that work:

don't use text color same with your background... this is consider as hiding text..

blue and green most common... don't use yellow and white, especially when the text is yellow...

In the book "The principles of beautiful web design" by Sitepoint theres good reference to colour use on websies worth a look,

hmmm..i think that both bright color is a no no. and to dark color is a no no to.