diff --git a/.config/qutebrowser/config.py b/.config/qutebrowser/config.py
index e28b8f0..5ce7d27 100644
--- a/.config/qutebrowser/config.py
+++ b/.config/qutebrowser/config.py
@@ -464,6 +464,18 @@ c.zoom.levels = [
 # Type: QtColor
 c.colors.webpage.bg = '#1c1b22'
 
+# Value to use for `prefers-color-scheme:` for websites. The "light"
+# value is only available with QtWebEngine 5.15.2+. On older versions,
+# it is the same as "auto". The "auto" value is broken on QtWebEngine
+# 5.15.2 due to a Qt bug. There, it will fall back to "light"
+# unconditionally.
+# Type: String
+# Valid values:
+#   - auto: Use the system-wide color scheme setting.
+#   - light: Force a light theme.
+#   - dark: Force a dark theme.
+c.colors.webpage.preferred_color_scheme = 'dark'
+
 # Default font size to use. Whenever "default_size" is used in a font
 # setting, it's replaced with the size listed here. Valid values are
 # either a float value with a "pt" suffix, or an integer value with a