Guest Attire

The attire theme is extremely casual. The wedding location (Neist Point) is a remote clifftop on the Isle of Skye. The average June temperature on the Isle of Skye is 59. Think wellies (rain boots) or hiking shoes and a windbreaker.
Our wedding is going to be small. So, instead of just the bridal party in our wedding photos, we would like to invite all our guests to be in our wedding photos. If you would like to participate, please dress in the color theme provided above.
Are jeans allowed? Recommended?