I recommend reading the sites that the other posted
But the base is understaning the differences between recessive mutations, dominant mutations and sex linked mutations.
Recessive: Black cheek, black breasted, floridan fancy, isabel, orange breasted, penguin, pied, white (and some more)
Dominant: Black face, fawn cheek, dominant silver, creasted.
Sex linked: Chestnut flanked white, fawn, lightback.
So, when you have recessive mutations both parents need to have the gene. Let's take an example with black cheek.
Black cheek x black cheek = around 100% black cheek chicks
black cheek x split black cheek = around 50% black cheek chicks
split bc x split bc = around 25% black cheek chicks
black cheek x normal grey = all split to bc but no fully black cheek
Split is when the bird carried the colour gene but does not show the colour. Some mutations show some hints but others hide them completly.
When you have dominant mutations you only need one parent with the colour to pass it on to offspring
Sex linked is where it get's tricky. I'll write down what I remember. Let's take chestnut flanked white (cfw) for example.
male cfw x female cfw = cfw chicks
male cfw x normal female = cfw female chicks and split males
normal male x cfw female = split males and normal females
Can't remember the splits, but basicly it's best to have the male in the desired colour, then you can at least get some girls like that
Hope this helped a bit.