Too much work 😭 Just skip to the last part (lower the opacity part), then use the eyedropper tool to get the color Save the color to your palette and then we'd either just use alpha lock or clipping to add the colors on the outlines....
This is actually REALLY useful! Here is another technique i use! So basically you select opacity, add layer, colour it in with the colour u used, then BOOM u got it :) I rlly loved this technique tho, i never knew u could do that :0