Red Background Generator

Make a red background or red wallpaper in 10 styles. Two are drawn only for red: a glossy lacquer with long light sheen bands, and a stage curtain of velvet folds under a scalloped valance. The other eight are a gradient, soft clouds, a checkerboard, grid paper, marble, paper, soft blobs and polka dots. Pick one of 10 sets of reds, from cherry and scarlet to crimson, ruby, brick red, wine and oxblood. Every colour stays red: each set is checked against one stated range, and so is every pixel of the picture. Set the number of shapes, squares, bands or folds, the angle, the softness and the grain. Every picture comes from a seed number: the same seed and size always give the same picture, and New seed gives you a new one. Choose desktop, 4K, phone, a 16:9 video-call background, tablet, square, banner or your own size up to 4096 pixels, then download a PNG or JPG, or a PDF to print. Nothing is uploaded.

100% private — everything runs in your browser. Everything runs in your browser; nothing is uploaded.

How to make a red background

1. Pick a preset: gradient, lacquer, stage curtain, checks, grid, marble, paper, clouds, blobs or dots.
2. Choose the style and one of the sets of reds.
3. Set the number of shapes, squares, bands or folds, the angle, the softness and the grain.
4. Press New seed for a new picture; the same seed always gives the same one.
5. Choose a size and download the PNG or JPG, or the print PDF.

What you can use it for

• Phone lock screens and bold desktop wallpapers
• Video-call backgrounds with a red stage curtain
• Posters, title slides and event screens
• Story, post and thumbnail backgrounds
• Lunar New Year, Valentine’s Day and holiday posts
• Printed backing paper for cards and scrapbooks

The 16 presets

Preset	Style	Reds	Size
Bold red gradient	Gradient	Cherry red	1920 × 1080
Glossy red lacquer	Glossy lacquer	Bright red	1920 × 1080
Red stage curtain	Stage curtain	Crimson	1920 × 1080
Red checkerboard	Checkerboard	Scarlet	1920 × 1080
Red grid paper	Grid	Brick red	1920 × 1080
Red marble	Marble	Ruby	1920 × 1080
Red paper texture	Paper	Poppy	1920 × 1080
Soft red clouds	Soft clouds	Cherry red	1920 × 1080
Soft red blobs	Soft blobs	Scarlet	1920 × 1080
Red polka dots	Polka dots	Barn red	1920 × 1080
Wine velvet curtain	Stage curtain	Wine	1920 × 1080
Oxblood lacquer	Glossy lacquer	Oxblood	1920 × 1080
Dark red gradient	Gradient	Oxblood	1920 × 1080
Phone wallpaper: red lacquer	Glossy lacquer	Ruby	1170 × 2532
Video call: red curtain	Stage curtain	Crimson	1920 × 1080
4K red gradient	Gradient	Bright red	3840 × 2160

Each preset only fills in the fields; change any setting afterwards.

The 10 styles

Style	What is drawn
Glossy lacquer (red only)	A deep three-shade gradient with long, soft light sheen bands, bent very slightly so they look poured
Stage curtain (red only)	Velvet folds from top to bottom (light crests, dark hollows, a narrow sheen on each crest) under a valance of scalloped swags
Gradient	A smooth blend of three colours of the set at the angle you set
Soft clouds	Soft rounded clouds in a lighter shade on a deeper sky
Checkerboard	Squares of two shades, straight or turned (45° gives diamonds)
Grid	Fine light grid lines with a heavier line every fourth square, like graph paper
Marble	Stone with soft winding light veins
Paper	A soft paper texture with tiny fibres
Soft blobs	Large blurred circles of colour
Polka dots	Round dots in rows, straight or turned

The 10 sets of reds

Reds	The five colours	Hue and lightness (worked out by the tool)
Cherry red	#ec3f3c, #e81a17, #c31613, #9e1210, #6f0d0b	hue 1°; lightness 24–58 %
Scarlet	#f24c36, #f02e14, #d3250d, #ad1e0b, #7d1608	hue 7°; lightness 26–58 %
Crimson	#e43a3c, #d71d20, #b4181b, #8b1315, #5e0d0e	hue 359°; lightness 21–56 %
Bright red	#f9231f, #ef0a06, #cc0905, #a90704, #7c0503	hue 1°; lightness 25–55 %
Ruby	#e8171a, #c31316, #9e1012, #790c0e, #4f0809	hue 359°; lightness 17–50 %
Brick red	#cd5d4c, #bb4735, #9b3b2c, #7b2f23, #582119	hue 8°; lightness 22–55 %
Wine	#ab3636, #8c2c2c, #702323, #551b1b, #3a1212	hue 0°; lightness 15–44 %
Oxblood	#a12123, #7f1a1c, #611415, #480f10, #330a0b	hue 359°; lightness 12–38 %
Poppy	#ee593f, #ec4122, #d83013, #b72910, #881e0c	hue 9°; lightness 29–59 %
Barn red	#cf3e30, #ae3429, #912b22, #74231b, #4e1712	hue 5°; lightness 19–50 %

The red range used for every colour and every pixel: hue 357° to 12° (going through 0°), a saturation of 35 % or more and a lightness of 10 % to 60 %.

Sizes

Size	Pixels	Width ÷ height
Phone	1170 × 2532	0.462
Desktop	1920 × 1080	1.778
4K	3840 × 2160	1.778
Video call background	1920 × 1080	1.778
Tablet	2048 × 2732	0.750
Square	2048 × 2048	1.000
Banner	1500 × 500	3.000

Every size is drawn at its own pixels, not stretched.

What downloads

Download	What is in it
PNG	The still picture at the full size you chose, every pixel exactly as drawn
JPG	The same picture as a smaller JPG (quality 92)
PDF	One Letter or A4 page with the picture fitted inside 10 mm margins

Paper	A 4K picture prints at	Sharpness
Letter (landscape)	259.4 × 145.9 mm	376 px per inch
A4 (landscape)	277.0 × 155.8 mm	352 px per inch

To fit a photo of your own to your screen instead, use the Phone Wallpaper Maker; to change the size of a picture afterwards, the Image Resizer.

Which tool to use

You want	Use
A red-only background or wallpaper	Red Background Generator (this page)
A green-only background, chalkboard or green screen	Green Background Generator
A seamless velvet tile in any colour	Velvet Texture
A colour blend in any colours, as CSS	Gradient Generator
A seamless check repeat in any colours	Checkerboard Pattern Generator

For a green wallpaper, a chalkboard or a flat green screen, try the Green Background Generator; for a seamless velvet tile in any colour, the Velvet Texture maker; for a blend in any colours as CSS, the Gradient Generator.

Frequently asked questions

Is this a photo?

No. Every gradient, sheen band, curtain fold, check, line, vein, cloud, blob and dot is drawn by our own code from the seed: it is artwork, not a photograph.

How do you make sure it stays red?

Every colour in every set is inside one stated range: hue 357° to 12° (going through 0°), a saturation of 35 % or more and a lightness of 10 % to 60 %. The drawing only blends colours from the chosen set, which all share one hue, and darkens very slightly for grain, which keeps the hue. Our tests check all 50 colours, and every pixel of every preset, against that range.

Is it red or pink?

Red. Very light reds read as pink, so the range stops at a lightness of 60 % and leaves out the purple-reds below 357°. Our tests check that no colour in the red range falls inside the pink range we use for pink backgrounds (hue 315° to 355°, or a light red of 70 % lightness and over), over every colour a screen can show.

What are the lacquer and stage curtain styles?

Glossy lacquer is a deep red gradient with long, soft light bands across it, like the shine on lacquered wood; set how many bands with the number field, and how wide with Softness. Stage curtain is a drape of velvet folds, light on each crest and dark in each hollow, under a valance of hanging swags; the number field sets how many folds.

Which reds are there?

Cherry red, scarlet, crimson, bright red, ruby, brick red, wine, oxblood, poppy and barn red. The table below gives the five colours of each set as hex codes.

Can I use it as a video-call background?

Yes. Choose Video call background (16:9, 1920 × 1080), download the PNG or JPG and pick it as a virtual background in your video-call app.

What does the seed do?

It fixes where every sheen band, fold sway, cloud, blob and fibre goes, and where the checks and lines start. The same seed and size give exactly the same picture, pixel for pixel.

Is it free?

Yes. There is no sign-up, no watermark and no limit.

Is anything uploaded?

No. Every pixel is worked out by JavaScript in your browser. Nothing is sent anywhere or saved when you close the page.