It is hard to say for sure what is good and bad when they are that young - especially in pictures. Javas keep maturing even past the 1 year old mark. It's not often a significant amount, but it can be enough of a change between their 1st and 2cd birthdays that they just have a different look to them and fill out completely, or you see their siblings filled out while one of them still looks like it's 6 months old. I usually wind up doing the final cull for each hatch when they are closer to 10-12 months old. By then I've got a better idea of how they will turn out, but even after that, they can still change in surprising ways. In looking at your pictures, I see birds that need to mature a bit.

I know, not that helpful.
Using a darker pullet with a whiter cockerel will help decrease some of the white. They do get whiter as they age, so trying to get more black in there is good. Gotta watch for those yellow feet though. Have found that the darker the birds are, the more often they start throwing chicks with pink feet instead of yellow.
But don't get too worried about getting the darker color in, try to focus on the size and type first. If you need to, turn your photos to black and white so there is no color in the photo at all to distract your eyes, then you can learn better what to look for when it comes to type.
Looks a bit like one of the pullets has the start of a squiggly comb. That will get passed on in the offspring, but you can still work with her and just have to really pay attention to culling out bad combs later on. I've kept a floppy combed girl just because the rest of her was so too good to pass up on. Decided that I was willing to deal with the comb in her offspring and try to mate her with a better-combed cock, just to get her good size, type, and pelvis width.
FYI with the tails - if a pullet has a correct tail angle to correspond with the SOP, by the time she is 1-2 years old, she is very likely to have a tail angle that is too high. When you're first starting and don't have many birds, you are at the mercy of using what you have (been there done that). But later on you can start being much pickier. So in future generations, you can watch and see how the pullets that have a flat back from neck to tip of tail usually turn out to have the correct SOP tail angle once they are a year old/older - while the pullets that look correct to the SOP at a young age, will usually end up as fully-matured hens with tails that look like a remote control car antenna on their butts.