To me the low spreading shrubs looks not like a boxwood , but a new light green spring growth on taxus baccata x media ( think the photo taken in spring judging on the size of the leaves on a clump of betula nigra- our native river birch) The boxwood’s fresh lime green growth happens later in the season in that zone, I think.
https://www.missouribotanicalgarden....3&isprofile=0&
Some of the cultivars of this cross breeding yew - could be very dwarf and low growing- I would look for those so you don’t have to shear and trim as much.
The year round color of yew/ taxus is dark green. I think on the left tall oval shaped shrub is a regular English or American yew sheared.
The orangish looking slightly taller shrubs to me looks like a deciduous false spirea shrubs, most likely spirea japonica ‘Goldflame’ cultivar: the new growth is very very orange - normally they are very large shrubs and look prettier in a natural shape, than the ones sheared like that. Orange is on a new growth only, then the foliage becomes green
https://www.google.com/search?q=spir...ibTUn0fO7Zf2cM
All deciduous shrubs need to be pruned annually to keep in good shape and color- by removing/ cutting off 1/3 of older growth to the ground.
Somebody mentioned arborvitae - tall on the right- perhaps ‘Techny’- darker color, I like ‘Emerald Green’ better- more tight foliage, more narrow columnar form as well as lower final height.
A group of Burgundy colored- on the left and one on the right - definitely looks like a Dwarf Japanese lace-leaf maple, acer palmatum var dissected perhaps ‘Crimson Queen’- new foliage- it would become darker more burgundy in the summer - maples are inappropriately pruned - misshapen- on the left.
Could not distinguish the rest of the shrubs for sure.
Some ideas for using evergreen shrubs:
Ilex meserveae holly or above mentioned yews will provide dark green color.
False cypress- camaecyparis pisifera ‘Golden Mop’ - plenty of dwarf varieties exist- could provide a yellow color or it will become chartreuse in the shade, which I prefer.
https://www.monrovia.com/plant-catal...false-cypress/
Blue star - juniperus squamous ‘Blue Star’ juniper shrub could provide an intense blue color
https://www.monrovia.com/plant-catal...-star-juniper/
For a beautiful green color not too dark and not too light I like
Dwarf hinoki cypress ‘ Nana Gracilis’ columnar not higher than 4 ft in 10- 15 years- no need to trim
https://www.newlifenursery1.net/prod...3¤cy=USD
Your usual photinas could be larger growing shrubs with very red new growing tips...
There are plenty of different colors and shapes in barberis shrubs - yellow, green, red- but I would stay away from those due to extremely dangerous thorns and their invasivness.