Update diff blue & yellow to match design
<img src="/uploads/60e1351fb04ab1c8969685fbc8b61c88/Screen_Shot_2016-04-22_at_9.12.17_AM.png" width="500px">
<img src="/uploads/6812b22ec53f3041811261daa0584822/Screen_Shot_2016-04-22_at_9.12.05_AM.png" width="500px">
See merge request !3883
