How colours on magazines effect their popularity

As you are aware, there are many very popular and money making magazines. There is a reason for this. If you were to go into a shop and see many magazines on the shelf, how would you choose a magazine? It has been proven that colours such as yellow and pink catch the readers attention the most. Magazines such as 'Closer' and 'Heat' (pictures below) use a lot of these colours to grab the readers attention and make them stand out from all the competitive magazines.

I never really gave any thought into how colours can make such an effect before I started this course, but now I realise the importance of how a magazine would be effected if they used dull colours that didn't catch the buyers attention.