This is a set of video's of the demo's that can be...
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This video clearly explains how to create a color picker in Construct 3. You can find the template here: howtoconstructdemos.com/hsv-color-picker-tool-c3p
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https://www.fiverr.com/bartalluyn/assist-you-in-creating-your-construct-3-project
VERY USEFULL , CONGRATS !