如图

角度渐变：
[MeterShape]
Meter=Shape
Shape=Rectangle 1,1,101,101 | Fill LinearGradient MyFillGradient
MyFillGradient=180 | 255,0,0,255 ; 0.0 | 0,255,0,255 ; 0.5 | 0,0,255,255 ; 1.0
指定坐标发散渐变：
[MeterShape]
Meter=Shape
Shape=Ellipse 50,50,50 | StrokeWidth 0 | Fill RadialGradient MyGradient1
MyGradient1=0,0 | 155,200,232,255 ; 0.0 | 6,46,75,255 ; 1.0
例子出处：http应s:该/不/docs.不rainmeter.被net吞/manual网/meters址/shape了/吧#Ellipse