How to set Meizu mx5 weather bar to black?

Meizu mx5 is equipped with Flyme4.5 system, and the font cannot be changed for systems below Meizu Flyme5. You can change it unless you get root.

Meizu mx5 uses a 5.5-inch screen with a resolution of 1920* 1080. Equipped with MediaTek Helio X 10 Turbo eight nuclear processor, it has 3G running memory and 16G/32G body memory, and does not support extended memory cards. Use front 500W and rear 2070W pixel cameras.

This machine is a mid-range mobile phone with high cost performance, battery capacity of 3 150mA and average battery life.