I have noticed the eggs from my local farm-market, and more generally, free range eggs, tend to have yellower yolks, sometimes even orange ones (which are very tasty). Yolk with deeper color should produce scrambled eggs with deeper, warmer color.
I do not claim this is a guarantee, by any means, it's what I have seen but that's not proof but simple correlation. The hen's diet is supposed to have an effect on color, as seen in this question and this one, but other living conditions or separate factors like breed might well play a role.
What I would recommend is, if you keep a rough track of which eggs you buy - especially since sometimes you get ones with good color and sometimes not - and try out different options like size, color, free range, organic (all depending on availability), you might see if some brand tends towards the brighter color as you prefer. At that point you can preferentially buy the one that works best for you. Or else you might find that, I don't know, the color matters more than brand, or which season the eggs were laid in makes is noticeable.
And if you find yourself with eggs that are pale for whatever reason, take Stephie's answer and look into yellowing spices like turmeric or paprika for a bit of extra brightness.