USE ADVANCED COLOUR TARGETING
1 ISOLATE STRONG COLOURS
use the colour picker tool in the hue/saturation dialog or the Colour range command to select stand-out colours. alter the Fuzziness slider in the latter to reduce or extend the colours and then make a new layer from this selection, to edit colours individually.
2 ADJUST HUE AND SATURATION
if using a hue/saturation adjustment layer, use the appropriate sliders to subtly customise the appearance of the subject colours. if necessary, use other images of the same subject for reference, to keep actual values natural.
3 CUSTOMISE WITH LAYER MASKS
if other areas of the image have been undesirably affected by the colour changes, use the automatic layer mask applied to an adjustment layer to erase those alterations. since edits are usually subtle, toggle the layer on and off to judge colour accuracy.