Which colour of light reflected by an object will make it appear blue?

1. The colour of an object is the colour of light reflected by the object.
2. The reflected colour falls on the human eye and makes it appear colourful.
3. So, if an object is blue in colour, then the colour of light reflected by that object is also blue.
4. Other colours of light are absorbed by that object.

Final answer: Hence, the reflection of blue colour by an object will make it appear blue.