In the following sections, each author describes their experience of unknown identification via colour perception using universal indicator solution, pH paper, and pH strips. Figures show the differences in colours viewed by each author due to their colour vision type to provide context to the author's written descriptions. Universal Indicator Solution: I found that the universal indicator solution was the fastest method for me to determine the pH of the solutions. I was able to independently distinguish all 5 colours and correctly identify the solutions; however, I did need to add additional indicator to the wells of the spot plate to improve the resolution of colours between the strong acid (red) and the weak acid (orange) as well as the strong base (purple) and weak base (blue).