Red
Since 1859 they have been red what has become known as Post Office red. Before 1859 they were green which is the colour of post boxes in the Irish Republic.
It doesn't any more. They were all replaced by glass telephone boxes about 20 years ago. Most telephone boxes - of any design - are now redundant because of the widespread use of mobile (cell) phones.
no
yellow
Telephones boxes were invented to keep dishonest persons from accessing a vital lifeline.
Borders are lines put around boxes. They can be complete boxes, or selected sides. Shading allows you to colour cells and have them different shades of a colour.
They both are not moble.
in the north blue and south yellow
They are yellow as are all post boxes in Greece. Also can be marked 'Hellas Post'.
Yes. Red telephone boxes were very common in Australia during the twentieth century.
public toilet