Nice blooming Calvin.
There has been a lot of confusion when blue is applied to the Cattleya family (and most orchids in general).
The correct term is coerulea or coerulescens (almost blue).
This is define as a slate 'bluish' light lavender that has a grey cast over the pink tone. Imagine a pink or lavender pink sheet, and put a grey see-through paper over it and you will get the coerulea.
This tone will be viewed differently based on the light shining on it. Morning and white LEDs will make it look 'bluish' while late afternoon sun and incandescent will bring out more reds and make it look for 'pinkish'.
So depending on when and what light you use to take the photo, the camera will capture the bluish or pinkish tones.
In judging, a flower is determined to be coerulea not based on the tag, but on the grey cast that subdues the lavender color of a typical Cattleya flower.
In the case of Dinard, although not visually blue, it is considered a coerulea flower because the overall flower looks like a grey tone has been put over an otherwise pink-lavender flower. This is obvious if you put a normal lavender flower next to it.