For some reason, all our paint colours that had blue mixed in them produced very inaccurate and muted colours. We figured that the shade of blue that we had was probably too dull. Hence, we decided to test out the same colours using a lighter shade of blue that resembled cyan. Though there are still inaccuracies, it was still an improvement.  

From here on, the paint ratios were trialled again and again. Eventually, we came up with a systematic way to calibrate our paint ratios such that a trend could be produced, hence forming various useful conversion equations.