---
title: "Fill - Tavlean"
description: "Fill turns any screen into a dimmable color field, softbox, or lightbox. Pick a color or white light, adjust brightness and warmth, lock the surface with wake lock, and share exact setups by URL."
source: "https://tavlean.com/projects/fill"
---

# Fill

Turn any screen into a controllable light or solid color

[Fill](https://fill.tavlean.com)

-   [Details](https://tavlean.com/projects/fill)
-   [Pulse](https://tavlean.com/projects/fill/pulse)

## Overview

Fill turns the entire screen into a controllable light, lightbox, or solid-color field. It started as a tiny display-check utility, but now works better for real situations: video-call lighting, tracing, screen cleaning, bias lighting, night reading, dead-pixel checks, or showing an exact color on another screen.

## Controls

-   Choose black, white light, red, or any valid CSS color.
-   Dim the screen with a brightness slider, arrow keys, or vertical drag.
-   Tune white light from warm to cool with the temperature slider, arrow keys, or horizontal drag.
-   Lock the surface for tracing, cleaning, or lightbox use so taps and wipes do not reveal controls.
-   Keep the screen awake while locked with the Screen Wake Lock API.
-   Share exact color, brightness, and temperature setups through the URL.
-   Restore the last setup on the next visit.
-   Works with touch, mouse, keyboard shortcuts, and TV-style remote input.