Color-matching optical illusion · Trending
How to play Hue Knew: where to play & similar games
How to play Hue Knew — Hue Knew is a free browser game hosted on GitHub Pages by edoborgiani. You try to match a target color by turning three RGB rings—but the two colors sit on different grays, and the surround changes how each color looks. The same paint can seem lighter on dark gray and darker on light gray, so your eye will lie to you.
Opens edoborgiani.github.io, run by edoborgiani. KoiArcade is not affiliated with the developer and does not host this game.
What is Hue Knew?
A round is one match. After five rounds you get a recap you can share. The page we checked also offers settings for harder contrast, HSV dials, hiding colors on the dials, and playing a friend's seed. There is no download and no account: open the link and play.
| Developer | edoborgiani (GitHub Pages at edoborgiani.github.io) |
|---|---|
| Genre | Color matching / optical illusion puzzle |
| Rounds | 5 per run, with a shareable recap at the end (as shown on the game page) |
| Platforms | Browser (desktop and touch); no install |
| Official page | edoborgiani.github.io/hue_knew/ |
What you do in Hue Knew
- Match under a lie: the target and your mix sit on different gray surrounds, so simultaneous contrast fools your eye.
- Three rings, one color: drag along R, G and B rings (or tap a point on a ring) to mix, then tap your color to lock it in.
- Score and share: both colors meet on one neutral gray; a ring fills with your score up to 100. After five rounds, share the recap. Settings include harder contrast, HSV dials, hidden dial colors, and friend seeds.
How to play Hue Knew
- Open the official Hue Knew page in your browser.
- Turn the three rings around your color to mix it. Drag along a ring, or touch anywhere on it.
- Tap your color to lock it in. Both colors then sit together on one neutral gray so you can see the real difference; the ring around them fills with your score (up to 100).
- Tap anywhere for the next round. After five rounds, read the recap and share it if you want. Use the gear icon for harder contrast, HSV dials, hidden dial colors, or a friend's seed.
Controls
| Drag / touch a ring | Adjust that RGB channel (or HSV if enabled in settings) |
|---|---|
| Tap your mixed color | Lock in the guess for the current round |
| Tap after scoring | Go to the next round |
| Info / gear icons | Read the how-to and change difficulty, dial mode, visibility, or seed |
Hue Knew won't open or has no sound?
- The game won't open or stays blank
- Refresh once and try a current Chrome, Edge, Firefox or Safari. The game is a static GitHub Pages site, so a strict network or offline cache can block it.
- There's no sound
- Hue Knew is a quiet visual puzzle; if your device is muted that is normal—there may be little or no audio.
- Colors look wrong on a phone
- Use a brighter screen and turn off aggressive night-light / blue-light filters while you play; the puzzle depends on accurate surround contrast.
- I want to replay a friend's run
- Open Settings and enter their seed if they shared one (listed on the how-to on the official page).
Hue Knew FAQ
Is Hue Knew free?
Yes. The GitHub Pages build is free to open in a browser with no download and no account.
Who made Hue Knew?
It is published by GitHub user edoborgiani on edoborgiani.github.io.
Can I play Hue Knew on KoiArcade?
No. We don't host or embed it. Use the official link on this page.
What is the trick?
The same paint looks different on light vs dark gray surrounds (simultaneous contrast). The game shows both colors on one neutral gray after you lock in so you can see the real match.
Opens edoborgiani.github.io, run by edoborgiani. KoiArcade is not affiliated with the developer and does not host this game.
Credits and sources
Hue Knew is made by edoborgiani. All game names, art and trademarks belong to them. The screenshot is our own. We don't embed Hue Knew. It is a standalone GitHub Pages game with no commercial embed licence stated on the page, so we link to the developer's site.
Sources: Official game · Developer on GitHub. Facts last checked on 2026-11-02. Spotted an error? Email [email protected].
