Top two strokes — the cap-shape also topping
兔 (rabbit),
急 (urgent),
色 (colour). In
免 those notches are key:
免 was
兔 with its tail-dot dropped, signifying the rabbit that escaped, hence 'to escape, to avoid.' The whole char is indexed under Kangxi #10
儿 (ér, legs) — the running-legs at the bottom.