Tinting one bucket of mud is a trick. Assigning a color to each coat is a system — and it is what turns guesswork into something anyone on the crew can read off the wall.
Every coat gets a different color. When you walk the wall, the color tells you what stage that section is at — without a work light, without a memory, and without asking whoever was here yesterday. That is the whole idea. Everything below is just a sensible way to assign the colors.
Coat 1 — tape coat: Pacific Blue. Blue reads strongly against white board and white tape, so embedded tape and bedded corners are unmistakable. Anything still white is untaped. Anything blue is done.
Coat 2 — fill coat: Golden Yellow. Yellow over blue is instantly distinguishable, including in poor light. You are looking for blue showing through — that is a spot the fill coat missed.
Coat 3 — finish coat: Final Coat Grey. Grey is deliberate. It approximates primer, so the finish coat reads close to what the painted wall will look like, which makes flaws stand out the way they will after primer instead of hiding behind a bright tint. It also means the last coat you put on is the least likely to telegraph.
Blue and yellow mixed together give you Hunter Green — a genuine fourth color from two bottles. Finishers running four-coat systems, or coding by crew or by day rather than by coat, use this constantly. Buy blue and yellow and you effectively own three colors.
By day. On jobs where coats are not uniform across the building, code by day instead of by coat. Monday is blue, Tuesday is yellow. You can see how far the work moved without walking it with a clipboard.
By crew. Two crews on one floor, each with a color. Accountability becomes visual: whose section flashed, whose corners are clean.
By scope. Pink for punch-out and repairs specifically. On a walk-through, every pink spot is something that was flagged and addressed — and the painter knows exactly where to look.
Whatever scheme you pick, write it on the bucket and keep it the same for the whole job. The system value comes from anyone being able to read the wall without being told. A color that means second coat on the third floor and repairs on the fourth is worse than no color at all.
If you only ever color one coat, make it the finish. That is the coat where a missed spot becomes a callback, and the coat where the difference between looks done and is done is hardest to judge by eye. Grey on the final pass, checked before primer, catches the defects that would otherwise get found by the customer after paint.
Blue and yellow mixed make green. Two bottles, three colors.
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