Block Out Level 840 Walkthrough
ExpertMeasured from the Level 840 image on this page, the sampled board breaks down into 11 main colours: blue (17.4%), light blue (12.9%) and pale blue (11.4%), plus 8 other colours. The dark board background covers 10.0% of the sample; it reads as empty space or mechanism panels rather than as a coloured block.
Level screenshot
What the Level 840 board is made of
Measured from the Level 840 image on this page, the sampled board breaks down into 11 main colours: blue (17.4%), light blue (12.9%) and pale blue (11.4%), plus 8 other colours. The dark board background covers 10.0% of the sample; it reads as empty space or mechanism panels rather than as a coloured block.
- Sampled colours
- 11
- Sample coverage
- 72.1%
- Empty sample rows
- 0
- Colour groups
- 69
The sample covers 72.1% of a 20x28 lattice: 11 colours, 0 empty rows and 69 separate colour groups.
blue 17.4% of the sample
Spread across the sampled board rather than parked in one corner.
light blue 12.9% of the sample
Concentrated in the central half of the sample, so these pieces have to cross the busiest lanes.
pale blue 11.4% of the sample
Mostly around the edge, close to the doors and waiting lanes.
green 10.2% of the sample
Concentrated in the central half of the sample, so these pieces have to cross the busiest lanes.
red 9.1% of the sample
Spread across the sampled board rather than parked in one corner.
orange 7.3% of the sample
Concentrated in the central half of the sample, so these pieces have to cross the busiest lanes.
purple 6.0% of the sample
Spread across the sampled board rather than parked in one corner.
pink 5.6% of the sample
Spread across the sampled board rather than parked in one corner.
navy 5.3% of the sample
Spread across the sampled board rather than parked in one corner.
dark purple 2.4% of the sample
Spread across the sampled board rather than parked in one corner.
dark orange 2.2% of the sample
Spread across the sampled board rather than parked in one corner.
navy 10.0% of the sample
Dark board backing — empty cells or mechanism panels, not a coloured block.
Read from the board image on this page, last measured 2026-10-19. Percentages are shares of the sampled board; the sample grid is not the game's exact cell grid.
How to read this board
Start from the largest colour: blue
Blue covers 17.4% of the sampled board — more than any other colour. It has the most pieces to route, so clear it early once its door is reachable instead of leaving it until the board is tight.
Protect the middle: light blue
Light blue sits mostly in the central half of the sample. Moving it will cross routes other colours still need, so keep that part of the board as clear as the level allows.
The board starts crowded
Only 10.0% of the sample is dark background. With little spare space, every parked block costs a lane; plan two or three moves ahead before sliding into the centre.
11 measured colours
The sample contains 11 main colours. Fewer colours means fewer door groups to track, but the remaining pieces can still block each other; clear one colour at a time.
How the Level 840 clear works
The sample fills 72.1% of its 20x28 lattice and splits into 11 colours and 69 groups. The pieces are spread across the sampled rows (44.6% top, 30.2% middle, 25.2% bottom) rather than stacked in one band. Navy is the most divided colour, with 11 separate groups in the sample. Space is shared, so the order matters more than the speed: a block parked in a doorway can wall off another colour completely.
Level 840 sits in the Expert tier and in the 801–840 block of this guide. Expert boards are the tightest: narrow lanes, moving elevators and generators that refill space you just cleared. Clear one color completely before opening another front, and restart early if the board jams. The sample has no empty rows and no full-width corridor, so spare space is limited.
Strategy note 1
The sample has no empty rows, so every move has to open the next one. Plan two moves ahead before sliding into the middle.
Strategy note 2
Navy is split into 11 groups. Clear the group closest to its door first; the far groups stay blocked until that run is finished.
Strategy note 3
72.1% of the sample is covered: enough room for one waiting lane, not two.
Strategy note 4
Clear the edge pieces before the middle ones; the centre is where every route has to cross.
Strategy note 5
If two colours are split into several groups, finish the smaller colour first so it stops competing for lanes.
These notes combine the measured 11-colour sample with the expert mechanics, not a move-by-move transcript. The video above is the exact clear for this board.
Block Out Level 840 — frequently asked questions
- What colours are on the Block Out Level 840 board?
- The board image on this page breaks down into 11 main colours: blue (17.4%), light blue (12.9%), pale blue (11.4%), green (10.2%), red (9.1%), orange (7.3%), purple (6.0%), pink (5.6%), navy (5.3%), dark purple (2.4%), dark orange (2.2%). The names are read off the measured hex values shown beside each swatch, so they can differ from the name the game gives the same block.
- Which colour covers the most of the Level 840 board?
- Blue is the largest measured colour at 17.4% of the sample. That makes it the colour with the most pieces to route, so it is usually the one worth clearing early once its door is open.
- How much of the Level 840 board is empty?
- The dark board background covers 10.0% of the sample. It can include empty cells and mechanism panels, so read it as spare backing area rather than a count of free moves.
- Does the board image show the order to move the blocks?
- No. A still image shows the colours and their layout, but not the block queue or the order the game offers. The video on this page is the exact clear; the measured breakdown is what the board costs to clear, not a tap-by-tap order.
- How is the Level 840 board laid out?
- The sample fills 72.1% of its 20x28 lattice and splits into 11 colours and 69 groups. The pieces are spread across the sampled rows (44.6% top, 30.2% middle, 25.2% bottom) rather than stacked in one band. The sample has no empty rows and no full-width corridor, so spare space is limited.
- What difficulty is Level 840 in Block Out?
- Level 840 is rated Expert difficulty in Block Out! - Color Sort Puzzle. Tiers run from Beginner (1-99) through Intermediate (100-249) and Advanced (250-449) to Expert (450 and up).
- Is there a video walkthrough for Block Out Level 840?
- Yes — the video on this page plays the complete clear of this board, so you can follow the block routes in real time.
- Why do I get stuck on Block Out Level 840?
- Most jams on Level 840 come from opening a second colour before the first is off the board. The sample holds 11 colours split into 69 groups, so every extra front costs a lane. Clear one colour at a time, keep the middle open, and treat the edges as waiting space.
- Does Block Out work offline?
- Yes. Block Out! - Color Sort Puzzle can be played offline once installed — there are no online requirements during normal play.
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