Generate a Colour Spectrum
Make a full-hue spectrum image at any size and angle — every hue from red back to red, as a PNG.
Describe the edit — the AI assistant does it on the canvas.
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What a spectrum strip is good for
A full turn of the wheel
The ramp runs through every hue at full saturation and lands back on red, so there is no visible seam if you tile it or wrap it. That closure is why it is built from thirteen stops rather than twelve.
Wide and short by default
The default is 1200 by 200 because a spectrum is almost always wanted as a strip rather than a block — a legend, a picker track, a decorative rule. Change the height if you need a full-bleed background.
The angle rotates the ramp
Zero runs left to right, which is what a horizontal picker or legend wants. Ninety runs top to bottom for a vertical track.
Not a data visualisation palette
A rainbow ramp is a poor choice for encoding values: it is not perceptually uniform, so equal steps in the data look like unequal steps in colour, and it fails for colour-blind readers. Use it as decoration or as a hue picker, not as a scale on a chart.
Lossless PNG
The transitions stay smooth. A JPG would put compression blocks straight across the gradient, which is where they are most obvious.
Using a spectrum well
Not for encoding data
Rainbow ramps distort the values they display and exclude colour-blind readers. Keep them decorative or use them as a hue picker.
It tiles seamlessly
The ramp closes back on red, so you can repeat it horizontally without a visible join.
Strip, not a block
The common use is a legend or picker track, which is why the default is wide and short.
How to generate a colour spectrum
Set the angle
Zero for a horizontal strip, ninety for a vertical one.
Set the size
1200 by 200 suits a legend or picker track. Raise the height for a background.
Download
Free preview, or the full-resolution PNG in the app.
Where a hue ramp gets used
Hue picker tracks
Build the background strip for a custom colour picker.
Legends and keys
Produce a reference strip for a design system doc.
Decorative rules
Add a spectrum divider to a page or slide.
Display testing
Check colour reproduction on a screen or a print proof.
Used by designers, indie devs & students at
What people use it for
The jobs the editor was built around — and what it does differently on each one.
Colourways you can revisit
Every edit is a layer, not a bake. When the brand shifts, reopen the file and change the colour rather than rebuilding the variant from the original.
Cutouts with awkward edges
AI background removal that keeps hair, foliage and soft shadows instead of stamping a hard outline around them. The output is a transparent PNG, ready to place.
No export, edit, re-import loop
The Framer plugin runs on the canvas you are already working in, so a recolour or a cutout does not mean a round trip through a second application.
Ten options in the time one used to take
Recolour once and step through the alternatives, so a client review can look at the whole range instead of the one version there was time to make.
Brand colours matched exactly
Pick a colour straight off an existing asset and get the hex, rather than eyeballing it against a screenshot and hoping it is close enough.
Free to preview, priced per export
Previewing is unlimited and costs nothing. A credit is spent only when you download a full-resolution file, so exploring an idea is never the expensive part.
Frequently Asked Questions
Related Tools
Guides worth reading
How to Fix Blurry or Fringed Edges on a Transparent PNG
Why your transparent PNG has a white halo, a grey fringe or soft edges — the four real causes, how to tell them apart in seconds, and the fix for each.
SVG vs PNG for Logos: Which File Do You Actually Need?
What SVG and PNG really are, where each one wins, why your developer keeps asking for the SVG, and the three files that cover almost every request.
How to Replace a Color in Photoshop (4 Methods, and Why the Edges Go Wrong)
Replace Color, Hue/Saturation on a targeted range, Color Range plus a fill layer, and Selective Color — which to use when, and why a recolored logo keeps a halo of the old color along its edges.
Generate a colour spectrum
Every hue, at any size.