An Extract from Extract from EN 60204-1:2006
13.2.4 Identification by colour
Where colour-coding is used for identification of conductors (other than the protective conductor (see 13.2.2)), the following colours may be used
BLACK, BROWN, RED, ORANGE, YELLOW, GREEN, BLUE (including LIGHT BLUE), VIOLET, GREY, WHITE, PINK, TURQUOISE.
The above is mainly in connection with panel wiring

"CE" marking does include the colour of cable cores

And within the countries that recognise the "CE" marking that cable would not be allowed
