Hue Rotator

The hue rotator turns a color's hue by a chosen number of degrees while holding its lightness and saturation constant, returning the rotated color as a hex value.

What is Hue Rotator?

• The hue rotator is a two-control tool: a colour field and a slider running from minus one hundred and eighty degrees to plus one hundred and eighty, defaulting to thirty.
• The result appears as a large swatch with its hex value and a copy button, updating as either control changes.
• Negative values rotate the hue one way round the wheel and positive values the other, with the value wrapping when the rotation passes the end of the circle.

The behaviour that matters is what stays the same. The rotation is performed in a perceptual colour space — the color is converted to a lightness, chroma and hue triple, the hue angle is incremented, and the result is converted back. Because only the hue term is touched, the rotated colour has the same apparent lightness and the same chroma as the original. A medium blue at moderate saturation becomes a medium green at the same saturation, not a darker or brighter one.

That is worth contrasting with the hue rotation available in CSS filters, which is the closest thing most people have used. A filter-based hue rotation applies a matrix to the red, green and blue channels, which is an approximation: rotating a saturated colour that way frequently shifts its perceived lightness as well, so a careful design can come out brighter or duller after the rotation. The result here is the one you would get by picking a different hue and matching lightness and saturation by hand, achieved in one step.

The slider's range is a consequence of that symmetry. Rotating by one hundred and eighty degrees swings the hue to the opposite side of the wheel — the complementary relation — and anything beyond that is the same as a rotation in the other direction, so the range covers the full circle without redundancy. A rotation of zero returns the colour unchanged, which makes the slider's origin a useful reference point.

The practical uses are mostly derivative. Building a set of related colours in which only the hue changes is the obvious one: take a single brand colour, rotate it by a fixed step several times, and you have an evenly spaced family at a consistent tone, which is precisely what a categorical chart scale or a set of state colours needs. It is also a quick way to answer what a colour would look like in another hue without committing to it, and a way to correct a palette whose colours drift in brightness — rotating in this space leaves lightness untouched, so only the attribute you asked about moves.

Limits to keep in mind.

• Only hue changes, so a rotation cannot fix a colour that is too dark or too grey.
• The output is a single hex value, and there is no history of previous rotations to compare against, so building a family means recording the values as you go.
• Extreme rotations from a saturated starting colour can leave the target hue outside the range a display can render, in which case the result is the closest renderable colour rather than the exact rotation.
• And the value shown is a screen-appropriate conversion, not a colour-managed one.

Even so, as a hue shift tool it answers a narrow, frequent question cleanly: rotate hue of a color by a known number of degrees and get back something with the same weight. Where a hue rotation css filter would change the tone as a side effect, this is the equivalent performed properly — a hue rotation css equivalent that does not lose brightness along the way — which makes it a reliable way to shift color hue degrees while agreeing with the palette rather than fighting it.

How to use Hue Rotator

1. Pick the starting colour with the field.
2. Drag the slider to rotate the hue — negative values go one way round, positive the other.
3. Copy the hex value from the resulting swatch.
4. Repeat with the same rotation to build an evenly spaced family of hues at one tone.

When to use Hue Rotator vs related tools

Use this when only the hue should change — building a categorical scale, exploring alternatives for a colour, or correcting tones that drifted. Use the saturation and lightness tools when those attributes are the problem instead. The temperature adjuster and the warm-to-cool shifter are the same rotation framed as temperature rather than as an angle.

Privacy & Security

This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.

Frequently asked questions about Hue Rotator