Constant DUOTONE
Source pub const DUOTONE: &str = "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 256 256\" fill=\"currentColor\"><path d=\"M215.94,182.08A48.33,48.33,0,0,1,168,224,136,136,0,0,1,32,88,48.33,48.33,0,0,1,73.92,40.06a8,8,0,0,1,8.3,4.8l21.13,47.2a8,8,0,0,1-.66,7.53L81.32,125a7.93,7.93,0,0,0-.54,7.81c8.27,16.93,25.77,34.22,42.75,42.41a7.92,7.92,0,0,0,7.83-.59l25-21.3a8,8,0,0,1,7.59-.69l47.16,21.13A8,8,0,0,1,215.94,182.08Z\" opacity=\"0.2\"/><path d=\"M144,104V64a8,8,0,0,1,16,0V84.69l34.34-34.35a8,8,0,0,1,11.32,11.32L171.32,96H192a8,8,0,0,1,0,16H152A8,8,0,0,1,144,104Zm79.88,79.08A56.26,56.26,0,0,1,168,232C88.6,232,24,167.4,24,88A56.24,56.24,0,0,1,72.92,32.13a16,16,0,0,1,16.62,9.51l21.12,47.15,0,.12A16,16,0,0,1,109.39,104c-.18.27-.37.52-.57.77L88,129.45c7.49,15.22,23.41,31,38.83,38.51l24.34-20.71a8.12,8.12,0,0,1,.75-.56,16,16,0,0,1,15.17-1.4l.13.06,47.11,21.11A16,16,0,0,1,223.88,183.08Zm-15.88-2s-.07,0-.11,0h0l-47-21.05-24.35,20.71a6.84,6.84,0,0,1-.74.56,16,16,0,0,1-15.75,1.14c-18.73-9.05-37.4-27.58-46.46-46.11a16,16,0,0,1,1-15.7,6.13,6.13,0,0,1,.57-.77L96,95.15l-21-47a.61.61,0,0,1,0-.12A40.2,40.2,0,0,0,40,88,128.14,128.14,0,0,0,168,216,40.21,40.21,0,0,0,208,181.07Z\"/></svg>";