Leucism is a recessive mutation which removes almost all pigmentation layers from a phony, similarly to albinism, making them look quite pale but not entirely white. Phonies with leucism retain their markings like melanistic ones do. Leucistic phonies use the leucism palette at the bottom of the page for all of their colors and markings. Leucism is a separate mutation from albinism, and phonies with it hold no chance of passing it down.
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Dilute and concentrate are mutations which lighten or darken a phony. Dilute makes all colors in a palette significantly paler, and concentrate makes all colors significantly darker and richer. All normal phonies are considered heterozygous to this mutation, and invisbly have "Dc". This means that whenever two normal phonies are bred, there's a 25% chance of an offspring with dilute and a 25% chance of an offspring with concentrate.