Growing conditions make a huge difference to flower count & colouration.
This is Oncidium Twinkle "Fragrance Fantasy" grown in the windowsill.
& the same plant @ the next flowering when it had been in my growroom.

Colours have not been altered.
My cousin has a
Phal Sogo"Grape" that when i bought it was a deep red & had largish flowers.18 months on a new spike has flowered & the flowers are far smaller & are heavily spotted red.The difference is the plant has only just got enough light to keep it going.I,m sure if i grew it the flowers would be back to the deep red.
The flowers on my Phrags change as the seasons change.It seems the bigger the diurnal change in temps promote much more colourful flowers.
I have heard it said that if you keep your Phrags @ the bottom end of their temp range when they are flowering this will give you much deeper colours.
My pschopsis papilio(Boris) flowers last far longer in the greenhouse than in my growroom , probably due to the much highr humidity in the greenhouse.