Simple enough question and probably appears on face value quite mundane. But this question on another forum provided many hundreds of pages and many threads of debate. OK here were the main two arguments.  The colour of an Orange in the dark is still Orange...... a property of the surface which makes it absorb certain wavelengths of light and reflect others. and this..... The Orange in the dark has no colour...it is black.Black is the absence of colour.....The colour of any object in the first instant depends on the type and frequency of the EMR that falls upon it..... What do you think? Is an Orange still Orange in the dark? Or does it have no colour due to the absence of EMR falling upon its surface?