Colorful (subpixel) font rendering

[unode]

Expected Behavior

(screenshot from Gvim)

Subpixel rendering should render homogeneously across the entire window.
Having some kind of setting to disable/toggle this behavior would be useful too.

Actual Behavior

(screenshot from Nyaovim)

Nyaovim shows this alternating color pattern, more easily noticeable in the line with m and when looking at the screen from above/below (see screenshot at 100% zoom).

Your Environment

• OS: NixOS 18.09
• NyaoVim version 0.2.0
  • electron : 1.8.2
  • chrome : 59.0.3071.115
  • node : 8.2.1
  • v8 : 5.9.211.38
• Font used: Envy Code R
• nvim version: 0.3.1 (LuaJIT 2.1.0-beta3)
• Keyboard layout: US
• Linux: Window manager: awesomewm