That type of contrast is the usual finish on damascus and is a desirable trait to have. This is obtained through etching in some form of acid that dissolves the softer metal while leaving a darker contrast between the two metals after a bit of careful polishing.
Do you not like that look? This can be fully removed by sanding it down to a bare finish. The damascus adds more character IMO.
What type of steel is the blade made of?
This is a 440-C and AEB-L damascus blade of mine that the blade steel was made by Devin Thomas.