tinge

Short definition from Wiktionary

Noun

1. 1
   A small added amount of colour; (by extension) a small added amount of some other thing.
2. 2
   The degree of vividness of a colour; hue, shade, tint.

Verb

1. 1
   To add a small amount of colour; to tint; (by extension) to add a small amount of some other thing.
2. 2
   To affect or alter slightly, particularly due to the actual or metaphorical influence of some element or thing.
3. 3
   To change slightly in shade due to the addition of colour; (by extension) to change slightly in quality due to the addition of some other thing.