I’m Not an expert when it comes to legacy armor, but those legs and shoulders look very odd to me. Maybe you should have look at these concepts here-> http://www.beskarschmiede.de/viewforum.php?f=32
To the colors: sounds good, BUT if you wear black clothes under your plates you won’t see the plates themselves. Black black always looks like a black blob on pictures.
Use dark grey for plates or clothes and you will see much more contrast
I think what you have there is a legacy-inspired custom… Of course you can use that for your own build, but please notice that it NOT Hondo Karr but a custom design and additionally it is too big for you.
For example, the chest plate: since it is made from one piece, it shall not be wider than the outer ends of your collar bones. The direction of the tiled scales is also ergonomically wrong. Lower scale needs to overlap the higher scale. (exact opposite to roof- tiles)
Rivets are the canon way of fixing for this era thumbs-up
I have created more accurate templates for Hondo Karr which would make a good foundation for any Legacy-Era custom.