Red Screen
A full-screen solid red color (#FF0000). Fill your whole display, or download the red screen as an image in 480p, 720p, 1080p, 1440p, 4K or any size you type in.
Advanced — print resolution (DPI)
What is a red screen?
A red screen is simply a web page filled edge to edge with one solid color — Red, hex #FF0000, or rgb(255, 0, 0). It is a mid-toned, warm color: in HSL it sits at 0° hue, 100% saturation and 50% lightness, and its relative luminance is 21.3%. red is one of the standard CSS color names, so it renders identically in every browser.
Red screen at a glance
How a full-screen red (#FF0000) behaves as a light, a test pattern and a background — measured from the color itself.
| Brightness | 21% of a white screen | A dim glow — easy on the eyes in a dark room. |
|---|---|---|
| Blue light | very low (0% of its light) | Very little blue light, so it is gentle on your body clock at night. |
| Night use | Good | Dim and low in blue light, so a red screen works as a night light without being harsh. |
| Text on it | Black text · 5.3:1 | Readable for normal text (WCAG AA). |
| Display test | red at full power, green and blue switched off | A dead red sub-pixel shows as a dark dot. A stuck-on green or blue sub-pixel shows as a bright speck. |
What people use a red screen for
Protect your night vision
The human eye keeps its dark adaptation under dim red light, which is why observatories, planetariums, submarines and aircraft cockpits use red instrument lighting. A dim red screen lets you read a star chart, take notes or check a camera without resetting the 20–30 minutes it takes your eyes to adjust to the dark.
Test the red sub-pixels of a display
A pure red field (#FF0000) lights only the red sub-pixels and leaves green and blue completely off, so a dead or weak red element shows as a black or dark dot. Repeat with a green screen and blue screen for a full sub-pixel sweep.
Stage, mood and alert lighting
A red screen is instant atmosphere — a darkroom-style glow, a warning light for a stream or event, dramatic mood lighting for photos and video, or a themed backdrop.
As a test pattern, a flat red field makes a dead or stuck pixel jump out, and it exercises the red sub-pixel.
#FF0000) — this is also the preview image shown when you share the page.How to use the red screen
The color is already set to Red (#FF0000). Tap Open full screen, or the preview, to fill your whole display with red; press Esc or tap again to exit. To keep a copy, pick a size — 1920 × 1080 for a desktop wallpaper, 1080 × 1920 for a phone or 3840 × 2160 for a 4K TV — and tap Download PNG or JPG. The file is created in your browser and saved as red-screen-1920x1080.png, with no watermark. A flat red image compresses to a few kilobytes even at 4K.
Every resolution, aspect ratio and device tip (phones, TVs, projectors, second monitors) is in the full color screen guide.
Red screen color codes
The full-screen color and every download use exactly these values. Tap any row to copy it.
Contrast against white text 4.00:1 · against black text 5.25:1. See the full Red color page for harmonies, shades and tints, or open it in the color picker.
Colors that go with a red screen
Using two screens side by side, a split display or a red wallpaper with accents? These named colors sit in harmony with Red on the color wheel:
Build a full scheme from red in the color matcher or the palette generator, or blend it into another color with the gradient creator for a gradient wallpaper.
Popular color screens
The colors people reach for most often as a full-screen background or light:
Colors similar to Red
More red screens
Red screen — FAQ
What is the hex code for a red screen?
A red screen uses the color Red, hex #FF0000 — rgb(255, 0, 0). The full-screen view and every download use exactly that value, and red also works as a CSS color name.
How do I make my whole screen red?
Open this page and tap Open full screen (or tap the preview). Your browser fills the entire display with red and hides its own toolbars; press Esc or tap the screen to come back. To keep it, download it in 1080p, 4K or any size as a free PNG or JPG — no sign-up or watermark.
How bright is a red screen?
A red screen gives off about 21% of the light of a white screen at the same brightness setting, a comfortable level for ambient light. About 0% of its light is blue (a white screen is 33%), which counts as very low blue light.
What color text is easiest to read on a red screen?
Black text, with a contrast ratio of 5.3:1, which passes the WCAG guideline for normal text. Check any other pairing in the contrast checker.