Colour can organise a photograph before its subject becomes clear. In work credited to Michael Easton, inspect any colour images for dominant hues, small accents and transitions between warm and cool areas. Notice whether a bright detail attracts attention because of its size, saturation or surroundings. A useful description names the relationship between colours, rather than simply calling a picture colourful.
Compare two frames at a similar viewing size. Does a repeated accent connect them, or does a change in palette mark a new section? Screen brightness and display settings can affect your impression, so avoid treating a small online preview as a precise colour reference. Make notes about relative relationships within each image and revisit them before drawing conclusions about a whole portfolio.