Simple Orange (gradient)

Simple gradient from orange to white. Not distubing and easy to look at. http://www.bonoseo.com/

Simple stylish

Simple stylish

SimpleFox-Like

Minimal.

Soft Aqua

Soft Drawing Paper

Soft paper texture

Soft Grey

The is a soft white to grey gradient that gives the browser an easy-on-the-eyes look.

Solarized Fox

Basic, solid colored Persona made to match the Solarized terminal theme.

Solid Green

A solid green Persona

Solid Grey

Simple Grey persona
Solid gray

Soothing Pink

A very non-distracting pale pink color with high contrast text for those who want something that's barely there.

SpaceShaman Dark

Step into the dark side of the force and discover the secrets of the cosmos without the risk of eye damage!

Strange Blue

Stylish

Gray gradient stylish theme

Synthwave_Gradient

Synthwave Gradient for Thunderbird Email

thin top blue gradient

thin top burgundy gradient

thin top red gradient

tranquil blue

Vioorange Warm

Warm, cozy, bright theme in violet and orange, ideal for winter or autumn.
Screenshots: https://imgur.com/NdKQA43 | https://imgur.com/uXtZpPw

white