Oh Ryan, it was so sad when they asked what styles and colors you’d want!
How about a hoody? Seems like reducing sunscreen goes hand in hand with the all natural ethos of this brand. Plus, a light hood is nice on chilly summer nights in a hood less quilt, and to add a touch of comfort to the head if the temperature drops.
And color, why black? You mentioned for some extra warmth, but if I am wearing nothing but a 110 weight baselayer , it must be warm weather. So, more worried about overheating on summer days with a black baselayer.
Even if it’s cool  (and I’m working hard), a light color is better, to minimize warmth variations as you move in and out of sun (clouds/shade).
And finally, a black color must be harder to dye, requiring more dye and more processing than a less saturated, more natural color, and it shows dirt more.
So please, Arms of Andes, make a long sleeve hoody in the 110, in a medium color that’s easy to use natural dyes.