Games and odds · free tool

Colour Prediction Simulator: Is It Predictable?

Updated 8 October 2026 · 6 minute read

In fair random rounds, nothing predicts the next colour. This simulator is the opposite of a prediction tool: it makes the rounds, then shows what streaks, four popular pattern rules and doubling after a loss do on them.

Tool · runs in your browserNothing is uploaded

1. What random rounds look like

about 8longest streak of one colour that chance alone usually gives in 300 rounds
69.5%chance of 7 or more in a row of a colour you name in advance
91.2%chance of 7 or more in a row of either colour
13.4%chance of 10 or more in a row of a colour you name in advance
25.0%chance of 10 or more in a row of either colour

In 300 fair rounds with a 50% chance of green, a run of 7 or more of one colour you name in advance turns up 69.5% of the time, and a run of 10 or more 13.4% of the time. If either colour counts, the figures are 91.2% and 25.0%. Streaks like these are what chance looks like, and none of them says anything about the next round.

Chance of a streak of at least this length somewhere in 300 rounds (green 50%)
Streak of at leastA colour you name in advanceEither colour
5 in a row99.4%>99.9%
6 in a row91.3%99.4%
7 in a row69.5%91.2%
8 in a row44.2%69.4%
10 in a row13.4%25.0%
12 in a row3.5%6.9%

2. Do the popular “systems” beat guessing?

Four rules people swear by, each run over 100,000 fair rounds. A guess is right 50% of the time.

50.26%best score of four popular rules over 99,995 fair rounds
49.74%worst score of the four
0.26 pointsfurthest any rule sits from the 50% that plain guessing gets
± 0.32 pointshow far luck alone moves a score over that many rounds
± 10.0 pointshow far luck alone moves a score over just 100 calls

Four popular rules were each scored on one fixed run of 100,000 fair rounds, every guess made from the rounds before it. All four land within 0.26 points of 50%, which is what guessing gives. Over just 100 calls luck alone moves a hit rate by about 10.0 points either way, so a short record cannot tell a clever rule from a lucky one.

Four popular rules on one fixed run of 100,000 fair rounds
SystemRounds testedRight
Repeat the last result99,99549.95%
Pick the opposite of the last result99,99550.05%
Follow the majority of the last five99,99550.26%
Fade the majority of the last five99,99549.74%

3. The double-after-loss plan

Defaults: a two-way bet that pays 2× with a 2% fee, so it is not quite 50/50. Use the numbers your app states.

7losses in a row your bankroll can absorb
89%chance the plan breaks at least once in 500 rounds
₹1,270lost when it breaks
₹10won each time the first bet wins
-₹3average result of one full cycle

A ₹10 first bet with ₹1,270 set aside can absorb 7 losses in a row, and over 500 rounds the plan breaks at least once 89% of the time. Small wins most of the time, one big loss now and then, and the average is below zero. The plan changes how the loss arrives, not whether it does.

The same plan with bankrolls that cover 4 to 8 losses in a row (₹10 first bet, 500 rounds)
BankrollLosses in a row it absorbsLost if the plan breaksChance of a breakAverage result of one cycle
₹1504₹150over 99.9%-₹2
₹3105₹310over 99.9%-₹2
₹6306₹63098.9%-₹2
₹1,2707₹1,27089.5%-₹3
₹2,5508₹2,55067.7%-₹3

What this simulator is, and what it is not

A prediction tool claims to know what comes next. This simulator does the reverse. It makes its own rounds with a random number generator, then tests the ideas people use to “read” colour games against those rounds. It is not connected to any platform and reads no real results.

“Fair” has a narrow meaning here. Every round is drawn the same way, and no round looks at the one before it. Strictly, a computer formula makes the rounds, so they are pseudo-random, but for the tests above they behave like fair coin flips. That describes the simulator’s numbers only. It says nothing about how any platform makes its rounds, because we cannot see inside any platform.

The generator starts from a seed, a starting number. The same seed always gives the same rounds, so a result can be checked again. Part 2 uses one fixed seed, which is why its table never changes. Parts 1 and 3 pick a new seed each time you press their button.

How to read each part

The three parts sit in the box above this text. For each one, here is what to look at and what an ordinary result looks like.

Part 1: what random rounds look like

Choose 100, 300, 1,000 or 3,000 rounds and press New random rounds. Green and red dots show the rounds in order, and the longest streak of one colour is outlined. Four tiles underneath give that streak, the length chance alone usually gives, the longest zig-zag (the colour changing every round) and the number of streaks of five or more.

An ordinary result at 300 rounds: the tile that says what chance alone usually gives reads about 8, and a run of seven or more of one colour you name in advance turns up in 69.5% of 300-round stretches (fair 50-50 rounds). A streak of eight or nine is not a message. The streaks page has the full table for 100 to 3,000 rounds.

Four popular rules are scored on 100,000 fair rounds: repeat the last result, pick the opposite, follow the majority of the last five, and fade that majority. Guessing is right half the time. An ordinary result: all four land between 49.74% and 50.26%, and the furthest sits 0.26 of a point from half. The pattern systems page gives the table and shows how far luck alone can push a score.

Part 3: the double-after-loss plan

Type a first bet, a bankroll (the money you set aside for the plan), the chance of winning a round, the payout, the fee and the number of rounds. The tool reports how many losses in a row the bankroll can absorb, how likely the plan is to break, and what a break costs.

The starting boxes hold a ₹10 first bet, a ₹1,270 bankroll, a 49% win chance, a 2× payout, a 2% fee and 500 rounds. With those, the bankroll absorbs 7 losses in a row. The chance of at least one break is 89.5%, a break costs ₹1,270, a win on the first bet gains about ₹10, and an average cycle comes out about ₹3 below zero. These numbers are an illustration, not any platform’s rules. Double after a loss has the table of bankrolls and explains the button that plays one random path.

What it can show, and what it cannot

It can show youIt cannot show you
What fair random rounds look like, long streaks and neat patterns includedWhether the rounds on any platform are fair or random
That popular pattern rules score close to half on fair roundsYour app’s real odds, payouts or fees, which sit on its rules screen
What the doubling plan risks for the numbers you typeWhether a platform limits the size of a bet

Any tool that sits outside a platform has one more limit: it can look only at rounds that have already been played. If rounds are independent, nothing in the past points to the next one, so a predictor has to claim it knows something that does not exist yet. To test a predictor yourself, write its calls down before each result and count them. The predictor apps page shows how.

Using your own numbers

  • Streaks: change the chance of green to see an uneven game. The “usually gives” tile assumes an even split, so in an uneven game the likelier colour will run longer than that tile says.
  • Systems: there is nothing to enter. The test is fixed so its numbers match this page.
  • Doubling plan: copy the win chance, the payout and any fee from your app’s rules screen, then type the bankroll you would really use.

Where to go next

To see what a session costs on average, use the expected-loss calculator. To see how sellers dress up “formulas”, read colour tricks and formulas. This is one of the free tools on this site.

More about the prediction simulator

Common questions

Does the simulator predict the next colour?

No. It cannot, and it is built to show why. It makes fair random rounds, then shows what streaks, popular pattern rules and doubling after a loss do on them. Nothing in it looks ahead.

Why is the pattern table the same every time I open the page?

That part runs on one fixed set of 100,000 rounds, so its numbers never change and they match this page. The streak rounds and the doubling-plan path are new each time you press their button.

Can I put my app’s odds into the simulator?

Only in the doubling-plan part, which has boxes for the win chance, the payout and the fee. Copy them from your app’s rules screen. If the app does not state its chances, the tool has nothing real to work from.

Does the simulator show whether a platform is fair?

No. It shows what fair random rounds look like and nothing about how any platform makes its own. We cannot see inside any platform, so we give no verdict on one.

Does the simulator send the numbers I type anywhere?

No. It runs in your browser and works everything out on your own device. Nothing you type or choose is uploaded.

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