Yes, colour and color mean exactly the same thing. Traditionally, the difference is that colour is the British spelling and color is the American spelling. This discrepancy came about when Noah Webster publicized his American Dictionary in the early 1800s and altered the spelling of words like favour, honour, colour, and neighbour so the u was not included, mainly for reasons of strong nationalism.
Both spellings are acceptable.
color - colour favorite - favourite gray - grey
Contrasting and complimentary colours are the same thing. Green is a secondary colour. You achieved a secondary colour by mixing two of the three primary colour. In this case green is the mixture of Yellow and Blue. The complimentary colour to a secondary colour is the primary colour not used to create it; in this case the complimentary (or contrasting) colour to green is red.
They are the same colour colour as humans eyes!
Related colour's are when the secondary colour and another secondary colour have the same primary colour.
Same color as what?
The same colour as your skin.
The fill colour is the same as highlight and the font colour changes the colour of the words.
Just the spelling, some words are spelled different ways in different countries like color (USA) colour(UK) but mean the same thing or completely different words for the same thing even with the same common language due to regional differences. like gluten/fat
No they are not the same color
Facial hair has no smell and it is the same colour as the hair on your head.
Its the same colour as a blue waffle
It is the same colour usually. It all depends on the time of day and weather.