How is the boundary decided?

Hues from 0 to 70 degrees and from 320 to 360 degrees are warm; everything in between is cool. The band wraps across the end of the circle so reds on both sides are treated the same.

Why is violet rated cool?

Because the warm band stops at 320 degrees. Violet sits below that, so it falls on the cool side even though it neighbours magenta.

Is saturation taken into account?

No. Only the hue angle is tested, so a desaturated colour's verdict follows the small amount of hue it still carries.

Can I check a whole palette?

Not on this page — it takes one colour at a time. A palette-wide temperature read is a different tool in this domain.

Does it name colour families beyond warm and cool?

No. The rule is two bands and a fixed threshold: anything outside the warm hues is cool, so mid greens and mid cyans land firmly on the cool side and there is no family naming beyond the warm or cool verdict. Lightness and chroma are ignored, which means a near-black green and a vivid green return the same answer.

Warm vs Cool Analyzer

Color

#3B82F6

Temperature

Cool

Hue 260° — blues, greens, purples

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The warm cool analyzer classifies a colour as warm or cool from its hue alone, reporting the degrees it used and the family that follows from them.

What is Warm vs Cool Analyzer?

Pick a colour and the tool returns a verdict. The card on the right is titled Temperature and shows either Warm or Cool in large type, then a line recording the hue in degrees and a short family description. The rule behind it is fixed: a hue between zero and seventy degrees, or at three hundred and twenty degrees and above, is warm; everything else is cool.

The line is drawn where it is because of where the warm range sits on the wheel.
Orange and red occupy the low degrees, and red continues past the end of the circle into the three-hundreds, where magenta begins, so the classification has to handle the wrap-around at three hundred and sixty.
The test compares the hue against two bands joined at that seam and covers the full circle without a gap.

Cool is the answer for anything outside those bands, which places mid greens and mid cyans firmly on the cool side. Violet around three hundred degrees is judged cool as well, since the warm band does not begin until three hundred and twenty — arguable to the eye, but consistent, and the boundary is at least stated rather than implied.

The verdict is about hue only. Lightness and chroma are ignored, so a near-black green and a vivid green are both cool, and a pale yellow and a saturated orange are both warm. That keeps the answer reproducible and narrowly defined, and it explains the cases where the tool disagrees with the eye: near-neutral colours have no meaningful hue, and their verdict follows whatever small hue residue they carry.

The boundary values are worth remembering, because the two bands are the entire rule. A hue of exactly seventy degrees is warm and seventy-one is cool; three hundred and nineteen is cool and three hundred and twenty is warm. Colours that straddle the line — an orange-yellow, a violet-red — flip their verdict on a single degree, and the hue printed in the card makes it easy to see when a colour is close to an edge rather than comfortably inside one band.

The honest uses are the ones that depend on the definition rather than on taste. Sorting a library of colours into warm and cool batches, checking that a set is not accidentally all warm, and verifying that a hue written into a specification really is on the warm side are all quick here. The question of whether a palette feels warm is a different one, and this page deliberately does not answer it.

Limits: one colour, one answer, a fixed threshold, no family naming beyond the warm or cool verdict and its short description, no lightness or saturation input and no palette view.
It is a color temperature classification with exactly one input: as a warm cool analyzer it turns warm vs cool colors into a number and a band, and for anyone asking is my color warm or cool, the hue based temperature reading is one pick away.

How to use Warm vs Cool Analyzer

Pick the colour to classify.
Read the verdict: Warm for hues from 0 to 70 degrees or from 320 to 360, Cool otherwise.
Note the reported hue if the colour sits near the 70 or 320 degree boundary.

When to use Warm vs Cool Analyzer vs related tools

Use this when a colour has to be sorted into a warm or cool group and the definition matters more than the impression — building batch palettes, checking a specification, keeping a set consistent. Use the colour psychology or mood tools when the question is about feeling rather than hue. The temperature analyzer puts a Kelvin figure on a single colour, the temperature adjuster acts on the reading, and the warm-to-cool shifter moves a value across the line.

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.