One thing that Bal also does is mix colours, maybe the black bags are one colour, but say Cornflower, it's blue, but a *little* purple. It seems that many of the colours have an undertone, sometimes I have a hard time matching the colour and undertone.
I agree with bagnshoo that if you were wearing a pink shirt, it should be either lighter or darker than the bag, otherwise it won't stand out and heavens, a Balenciaga should stand out : )
I try and wear complimentary colours, or neutrals and let the bag pop. I like yellows with my greens and some blues, but I am not very adventurous with colour. I wore a goldenrod shirt with my Rouge Vif this week and couldn't believe how well it went! I think that brown goes really well with all the colours you listed, same with grey.
I wish you well,
Bridget