Southwest home office designs can be very neutral. They can show your heritage and you can use red curtains or doubled curtains. It can also be a very relaxing space. It will use a lot of cheap furniture, so it's perfect if you are on a budget. It can also blend perfectly with many other wood tones, which is perfect if your office is in the open air.
One of the most important items you can bring into the space will be a somewhat unusual office chair. That means you want to spend a lot of black cloth or even a lot of black leather designs that are out there. It's just too modern for this kind of design. Instead, you have to go for rich brown or orange. Red and yellow can also work. Really almost any wood will compliment this design style and you could even simply work a basic vintage wood swivel chair in this kind of room too.
A wooden desk is also really a must. You can opt for darker cherry tones, provided that the desk itself is rather simplistic and that it can even act of a mission style. This will be one of your most expensive options. However, it can also work with many other wood tones that would seem a little dated. Oak and pine are really fantastic options for that too.
It is important to make sure that the wood tones do not really exceed this piece. You do not even need to bring accent colors into this design style as long as you stay true to the furniture as it is going to be hot enough to really make a statement in your space.