There is a heavily debate on speedsolving.com about color neutrality. A cuber called jskyler91 is saying that it's possible to become color neutral within one month if using his "method". The method is based on the following:

1. Start practising with your opposite color as your new cross color for 4 days
2. Practising a new color for another 5 days
3. On day 10 practise both the opposite color and the newly choose color always starting with the best cross option
4. Practise the opposite color to the color choosen in step 2 for 5 days
5. On day 16 practise both your original oppostise color and both the colors you have been working with this far always choosing the best cross alternative
6. Choose a new color and practise for 5 days
7. Use the oppostite color of the one in step 6 for 5 days
8. On day 27-30 practise all colors except your original always choosing the best alternative
9. On day 31 and forward always choose the best cross alternative

I have been thinking about this for a very long time myself but been to lazy to do it or given up after a few tries. This method is forcing you to always go for the color you have choosen for a period of time and get used to it. However, I have been practising with the opposite color for some time on and of for the past years so I feel pretty comfortable with that. I decided to give the method a try but jumped right into step 2 instead. After an hour of experimenting I could gradually increase the TPS when focusing on applying the "color filter" he is talking about. I do belive that it has potential and will continue practising to become color neutral.

Although, you only save a move or so according to Lars Vandenbergh's cross study you have the options to choose an easier more finger friendly cross instead of maybe a nasty cross. You only save a move but it can help you to get more fluency in your solve.

I'm also experimenting little with the Roux method and sometimes I can't find anything good with my original colors when there sometimes are some really good starts with other colors I'm not used to, so I definately think this method WILL work.

Another nice feture is that you will have to start to think again and be more active during F2L. Learning new things makes it more fun if you feel boresome always doing the same cross color over and over.The thing is after the 30 days NOT to fall back and doing the original cross color again 100% of the time. I think I can be little tricky to find an evaluate 6 crosses in 15 seconds but we will see.