How to handle 3 variant selection on product page

Taking an example of mobile phone's product page it has three variants

  1. Storage
  2. RAM
  3. Color

now let's say by default 64GB, 4GB & midnight black is selected, but for storage 64GB and Color midnight black, 8GB RAM is OUT OF STOCK but 8GB is available in other two colors (green and blue), How can we show this information as right now it feels like that 8GB is Out of stock for all the colors.

Attaching the solutions that I tried, please suggest if you have better solution

I also tried playing with logic for example keeping 8GB enabled and on selection of 8GB, auto update other variants based on availability but I think that will confuse the user.enter image description here

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