https://sarahrenaeclark.com/color-theory-basics/
FOR QUICK VARIATIONS
adobe illustrator>edit colours> recolour artwork - turn on link aspect
FOR CHANGINNG COLOUR OF OBJECT IN PHOTOSHOP WITHOUT MASK
hue saturation adjustment layer>select tool adjacent to the work master>sample your design colour from object>
primary secondary and tertiary colours
different colour wheels exist for design purposes
colour theory used to avoid blandness and overuse of colours