How to Play HueLine — Rules & Examples

Each day you get a row of color tiles with the two ends locked. Reorder the middle tiles so the whole row forms one smooth gradient — neighbouring colors as close as possible. Fewer moves is better.

The rules

1. Look at the locked tiles at each end — they set the start and end of the gradient.
2. Tap a middle tile to pick it up, then tap another to swap them (or just drag).
3. Watch the connectors: a solid ✓ link means that pair is in smooth order; a dashed ~ means keep going.
4. When every connector is a solid ✓, the gradient is complete. Solve it in as few moves as possible — everyone worldwide gets the same puzzle each day (UTC).

Reading the connectors

Turn on Assist to add non-color cues: a position number on every tile, a texture pattern per tile, and the edge ✓/~ glyphs. You can solve the whole puzzle by order alone, without seeing hue.

A worked example

1. 12345

   Step 1. Start: a blue→green sweep with two middles swapped — the violet sits where the teal belongs, so two connectors are dashed.

2. 12345

   Step 2. A first swap improves one edge but the violet is still out of place between teal and green.

3. 12345

   Step 3. Placing violet right after the blue anchor and teal into the cool-green run makes every connector solid — solved.

FAQ

How many tiles are there?

Between five and eight per day. The puzzle is a little smaller mid-week and larger on weekends, but always the same for everyone that day.

Why are the end tiles locked?

The two anchors fix the direction of the gradient. Without them a gradient could be read forwards or backwards; locking the ends guarantees exactly one correct order.

When does a new puzzle appear?

At midnight UTC. Everyone in the world plays the same puzzle for that UTC day, which is why the date is shown in UTC.

Is the puzzle solvable without seeing color?

Yes. Turn on Assist for position numbers, per-tile textures and edge glyphs, and you can solve entirely by order — no hue perception needed.

Does sharing my result spoil the answer?

No. The share text contains only generic colored squares and your move count — never the arrangement.