Welcome to the forums and the ever exciting world of budgie ownership!
You have certainly come to the right place as you will find all you need to know on budgie care here.
Your two new budgies are absolutely adorable!
And I can indeed hazard a lot of guesses.
The cutie on the first two pics is a beautiful young female, she is a sky blue full body colour greywing opaline budgie.
Your other young one is a male, he is a cobalt blue full body colour greywing budgie.
I can also tell you by looking at them that they are both very young and since you got them at such an early age, they must be recently weaned.
I'd say they have not yet reached two months of age.
Make sure they are both eating well their food, you can supplement their diet with egg food, this is an easy food for them to eat and very nutritious.
For more detailed info, check the Diet and Nutrition section of Talk Budgies.
Since they are both about the same age and have such similar colours and characteristics, I will also tell you that it's very likely they siblings from the same clutch.