Step 1: Understanding the Concept
The question asks to identify a "tint colour". This is slightly ambiguous wording. In colour theory, a tint is not a colour itself, but a variation of a colour (hue) created by adding white.
Step 2: Detailed Explanation
Hue: A pure colour (like Red, Green, Blue).
Tint: A hue mixed with White. For example, pink is a tint of red.
Shade: A hue mixed with Black. For example, maroon is a shade of red.
Tone: A hue mixed with Gray.
The question "Which is a tint colour?" is best interpreted as "What is used to create a tint?". From the options, White is the colour added to a hue to create a tint. Green, Blue, and Red are hues that can be tinted.
Step 3: Final Answer
Therefore, White is the answer as it is the component that creates tints.