ImGui.TextColored failed to change color when use CanvasRenderingContext2D

[40kg]

I try to show text with red color by ImGui.TextColored, it works good with webgl, but failed with CanvasRenderingContext2D. I use imgui_imp.ts as my render code, and get canvas by getContext("2d"). Could you give me some help, Thanks a lot!

[40kg]

Well, I resolve it by use another canvas with webgl, then draw the new canvas as a image to main canvas.