Costs for colored figures in Chemistry - A European Journal
The author guidelines report:


  The publication of graphical material in color is expensive, and we
  request that part of the additional costs be carried by the author. As
  a result of the production process, the online and print versions of
  the manuscript must be identical. If color is deemed essential for the
  scientific understanding and the author does not have access to funds
  for publication costs, the journal may consider covering the
  additional costs.


It seems that unlike many other journals, for what concerns colour figures, this one publishes a printed version which equals the online one. Note, however, the bold part.

An alternative possibility, which is less expensive, would be that of producing the manuscript with all black and white pictures and then delivering the coloured ones as online supplementary material. In fact, from the author guidelines,


  Color and animated multimedia applications are welcome and published
  online at no cost to the author or reader. Please refer to such
  applications in the article itself where appropriate (see the
  Supporting Information).


They might accept pictures too.

In any case, before making any decision, I'd suggest to contact the editor or the journal publishing services.