Oh I wish it were that easy. By and large when doing colour printing what you see is what you get. Say as an example you are intending to make a 12 x16 print. The darkroom is all set up, the chemicals are all at the optimum 35 degrees C. You start by turning off the light, setting up the enlarger, focussing it on the baseboard and make a test strip from what you judge to be an average tonal section.. Shall we say the range of steps are in increments of 5 seconds for a total of 25 seconds. Step 1 is far too pale step 2 a bit better step 3 is getting there step 4 is not far off but step 5 is exactly what we want. (Assuming the colour balance is correct as well) Slip a sheet of12x16 paper into the easel and make the 25 second exposure and develop, stop, then blix and wash it. Finally dry off the print and view in good light either daylight or under a cool light LED (about 6500 Celsius). The section you used to make the test strip is spot on but there is a bit that is too bright. Oooops back to the drawing board (or easel......)
If it were B&W, all we would do is do another test strip, possibly change the filtration for a softer grade and get what you are looking for by burning in or dodging the incorrect area.. Make the same B&W print again but alter the exposure/filter to darken the bright area or if the case is the other way give the area a little less exposure.
With colour it is a whole different ball game, If you darken or lighten an area there will be a contrast change and a change in colour balance which is hellishly difficult to correct, and impossible to correct in the case of too much or too little contrast. It is possible to get away with it over roughly 1.5 stops either way, but any more the difference become obvious to someone with damn near perfect colour vision (which I have).
That said, colour materials have a much greater latitude with exposure than B&W, so an ill exposed film by as much as 2 stops out either way, can be reclaimed by a skilled printer, but that is pushing the boundaries which are limited. But making a print using this latitude to make different exposures on one sheet of paper will become visible by an obvious miss- matched colour balance. B&W I would suggest offers more creativity than colour mainly because of the parameters that come with colour negative film.
Perhaps the best of both worlds is B&W printing using a chromogenic film like Ilford XP2. You choose.......27 yrs of colour printing have brought up most of the pitfalls and shown me how to avoid them,