Good morning!

You could use a privet! There are some cultivars that are better for that than others - the one I would suggest is Ligustrum vulgare 'Cheyenne'. Here is a little more information on them from a Colorado grower in Longmont.

Another other option that is evergreen that will do well is a mugo pine. They are smaller and can be slower growing so may not be a great fit for what you are looking for.

Thanks for reaching out!

Rachel

I would suggest the privet over the Japanese Spindle. It is an awesome looking shrub but does best in partial shade - it may get sunburn in your full sun location. It is also a zone six on the USDA hardiness zone. While Colorado has switched to a zone 6, depending where you are in Jefferson County, this plant could be marginally hardy and not overwinter.

Rachel