There are quit a few good blue orchids out there. For some good blue Vanda check out the photos at
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but I need to caution you that while there are some outstanding blues in this gallery they are exceptional specimen plants and rare color forms.
You can expect to pay a high premium for top color.
If the color is very important, you would have to see the plant in bloom. The color especially on Vanda change drastically from one plant to another.
The photo of V. Banjong is an example. The photo is very accurate but I have three in bloom today and not any blue at all. They are pink to maroon.
Look at the two photos of V. Mini Palmer - Theo Boon Hian x V. coerulea. One is a good blue and the other is nothing like the first.
The color form of V. Robert's Delight 'Blue Mum' is so rare the grower would have cut off my hands if I touched it.