[あか, aka] (n) (1) red; crimson; scarlet; (2) red-containing colour (e.g. brown, pink, orange); (3) (col) (often written as アカ) Red (i.e. communist); (4) (abbr) (See 赤信号) red light; (5) (abbr) (See 赤字・1, 赤字・2) red ink (i.e. in finance or proof-reading); (in) the red; (adj-no, n-pref) (6) (See 赤の他人) complete; total; perfect; obvious#1272
[いろづく, iroduku] (v5k, vi) (1) to change color (esp. leaves, fruit, flowers) (colour); (2) to turn crimson (e.g. leaves in autumn); to begin to redden; (3) to ripen; to grow ripe