React · SwiftUI · agent guides
Backlight
Light behind a translucent part, fading to nothing at its edge: a glow, a radar beam with a bright leading edge that fades behind it, or a blip. In a signal colour, the accent, or the glass's own colour lifted. Placed inside a Bezel.
Use it for
- A scope's sweeping beam and its blips; a cell grid's glow; a lens lit from behind.
- Light that comes from inside a gadget, seen through its glass.
Don't use it for
- A status light: that's the LED, a lamp in its own hole.
- Light on an opaque part. A backlight only shows through glass or resin.