Color red If red is written 「あか」 and something like 'reddish' is written 「あかい」, what means 「あかく」?

Blue... why the word blue, in Japanese, is written 「あお」 and when within a sentence is written　「あおい」?

Japanese music。。。 Someone can translate this music to english? 大きな栗の木下であなたとわたし仲良く遊びましょ大きな栗木下で 大きな栗の木下でお話ししましょみんなで輪になって大きな栗の木下で 大きな栗の木下で大きな夢を大きく育てましょ。

Nada a ver... alguém sabe como se diz a expressão "nada a ver" em inglês?

Do you like portuguese? Have someone that wanna be my partner of study? I really wanna learn japanese and I can teach portuguese...

First notebook entry: Introducing myself これは挑戦ですか。 ¬¬ 私の日本語書き込みは良くありません, だから私は改善したいと考えて。 Not only writing but also learn to speak ... Sorry, I was not going to write it in Japanese ... I think I wrote the other sentences wrong too.... T^T haha