What does a distance of zero mean?

That your colour is exactly one of the named values in the table, so the name restates it rather than approximating it. Larger numbers mean information was discarded.

Why did a muted olive snap to a grey name?

Because raw RGB distance does not model perception: #7A7A52 lands 33 units from dimgray and from nothing closer. The algorithm is right; the metric is simply not perceptual.

Can I see the second-closest name for comparison?

No — the page returns one candidate. If two names both look plausible, compare them by measuring the colours themselves instead of re-running the snap.

Does the snapped name keep my colour's exact value?

No, snapping replaces the value with the named one. Keep the hex alongside the name whenever the value is used downstream, because the substitute is a different colour.

Is the result the same every time for the same input?

Yes. The search is exhaustive over a fixed table and ties resolve toward the earlier entry, so a given colour always snaps to the same name.

Nearest Named Color Finder

Color

#3B82F6

Nearest CSS named color

royalblue

#4169E1

RGB distance: 33

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CSS Named Colors Reference

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The nearest named color finder snaps any colour to the closest CSS name and reports the distance it had to travel, which is the honest way to see what a name costs you in precision.

What is Nearest Named Color Finder?

Snapping is a lossy step, and the nearest named color finder makes the loss visible. Point it at a colour and it returns the closest entry in the CSS name table together with the RGB distance between the two, so the answer arrives with its own error bar. That is the difference between this page and a plain lookup: the question is not only which name applies, but how much of the original value disappears when the name is used instead. Snap a color to a name in one step, and read what the step cost in the figure underneath.

The snap is exhaustive and deterministic. Every one of the 141 css color names is compared in RGB, the squared channel differences are summed, and the smallest total wins; ties resolve toward the earlier entry in the table, so the same colour always snaps the same way. Because the table is small, there is no shortcut worth taking and no chance of a missed neighbour — the result is the true nearest entry, not an approximation of one.

More precision than the table can hold is discarded, which is the point of naming at all.
The distance readout is the residue: 0 means the colour is exactly a named value, and larger numbers mean the name is a summary rather than a restatement.
The snapped value always exists in CSS, so it can be pasted into a stylesheet as a keyword without a conversion step.

Measurements are where the metric shows its limits. Euclidean RGB distance is blind to perception, and the failures are not subtle: a muted olive such as #7A7A52 snaps to dimgray #696969 at a distance of 33, and the near-black slate #0F172A snaps to black at 50 rather than to any slate-coloured name, because no dark slate-grey entry sits closer in raw channel space. Those are correct answers to the question as asked and poor answers to the question most people mean. In other words, the metric will quantise a color perfectly well and understand nothing about it.

The table is coarse: 141 values have to cover the whole gamut, so average gaps are large and a snap can shrug off a visibly different colour.
Only one candidate comes back. There is no second-best list, so a bad snap cannot be compared against an alternative from this page.
British spellings are missing from the table, so grey values land on gray-spelled or unrelated entries.
Snapping changes the value, and a changed value changes contrast: a pair that passed before the snap may not pass after it.

Use it for design operations rather than for design decisions: naming a swatch so a ticket reads cleanly, describing an asset so a search finds it, sanity-checking that a colour a colleague mentioned is roughly the one in the file. Where the exact value matters, keep the hex; where the name has to be authoritative, read the table; and where two candidates both look plausible, measure the pair rather than the snap. Snapping is a description, and descriptions do not have to be exact — they have to be checkable, which is what the distance figure makes them.

How to use Nearest Named Color Finder

Set the colour you want to describe with the picker field.
Read the snapped swatch and its name — that is the value CSS would accept as a keyword.
Check the distance: near zero means the name is faithful, a large number means it is a summary.
Keep the original hex for anything precision-sensitive, and use the name only where a human is the audience.

When to use Nearest Named Color Finder vs related tools

Use this when a colour has to be described in words and precision is negotiable. The colour name lookup answers the same question with less emphasis on the distance, the CSS named colours reference is the source list when the name itself has to be exact, and the colour distance calculator compares two chosen colours when the snap is not the comparison you actually wanted.

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.