色いろを付つける

expression, ichidan verb

add a little extra; sweeten the deal; shade an account

Idiomatic expression meaning to add a small bonus, discount, or favorable adjustment, often in business or financial contexts. The literal meaning is 'to add color'.

• 値ね段だんに色いろを付つけてくれた。

  They gave me a little extra discount.

• 帳ちょう簿ぼに色いろを付つけるのはよくない。

  It's not good to shade the accounts.