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This is my second data point for purple. Analogous is my color scheme and main color is purple. I understood now I can't tint too much from the tube color if I want to keep the chroma high. So I select a dark purple object. I used dioxazine purple. After the painting I did a color mapping (that is the color analysis tool I developed a week ago) on it. I found that the chroma of the tube color of dioxazine purple is not very high (63 out of 100). The slight tinting I did decreases the chroma to 55, which is very similar to what I did in my previous purple study. I am still not there yet, but I surely know more about purple now.