You are two thirds of the way through a canvas and the pot you have been using most is nearly empty. This is the most common interruption in the hobby, and it has a straightforward answer, but not the one most articles give.
Why a Tube From the Craft Store Will Not Match
The paints in a numbered kit are not standard shades with standard names. They are custom mixes made for one specific design. The number on the pot is a reference to that design's chart and nothing else. Number seven in one kit has no relationship to number seven in another kit from the same maker, let alone a different one.
So there is nothing to look up. You cannot walk into an art shop and ask for the color, because it does not have a name. Even where a kit color happens to look like a familiar shade, tube acrylics vary between brands in pigment load, opacity and how much they darken as they dry. A tube that matches wet will often not match once the section is dry, which is the worst possible time to find out. The complete guide covers the rest of what goes wrong and when.
This is why the honest answer to running out is a set matched to your own design, from whoever made the kit.
First: Is It Actually Empty?
Half the time it is not, and this is worth checking before you order anything.
Thickened is not finished. Acrylic stiffens as water evaporates. Add one drop of water, stir it through with the end of a brush, and give it a minute. That usually brings a stiff pot back to working consistency. Add water one drop at a time, because too much makes the paint transparent and streaky and there is no undoing it.
A skin on top is not a dead pot. Lift the rubbery skin off with the brush handle and discard it. Do not stir it back in, because it will not redissolve and it leaves lumps that drag across the canvas. The paint underneath is usually fine.
There is more in there than it looks. Pots are small and the sides hold a surprising amount. Scrape the walls down with a brush handle before deciding you are out.
Fully dry and solid is genuinely gone. Once acrylic has cured it cannot be brought back with water or with anything else. That one needs replacing.
Which Colors Actually Run Out
It is predictable, and knowing it lets you ration from the start rather than discovering the problem near the end.
- The color covering the largest area. Usually a sky blue, a grass green or a mid brown. This is the one that goes.
- The pale colors. Whites, creams, pale yellows and pale blues are the least opaque paints in any set, so they almost always need a second coat over the printed numbers. Two coats means twice the paint.
- Whichever pot you left open longest. Air is the enemy. Open only the pot you are using and close it when you move on.
Matched Extra Paint
We make replacement sets matched to our own designs, mixed to the same chart as the paints that came in the box, so they are the same colors and the same numbers. They are in the extra paint collection, listed by design name.
Order the set for the design you are painting, not one that looks similar. Two of our designs might both contain a blue sky, and those two blues are not the same blue.
If you are buying a kit as a gift, an extra set alongside it is a genuinely useful second gift rather than a padded one. Running short on a heavily used color three weeks in is the frustration people actually report.
If Your Kit Came From Somewhere Else
Ask the seller first. Many makers sell matched replacements and simply do not advertise them.
If nobody can supply one, you are mixing, and there are two rules that make it survivable:
Mix far more than you think you need, and store it in a small airtight container. Matching a mix a second time, weeks later, against a section already on the canvas, is much harder than making too much once.
Test on scrap and let it dry before committing. Acrylic darkens slightly as it dries. Two colors that look identical wet can be visibly apart on the canvas. A scrap of card and five minutes of patience saves a section you cannot undo.
Match against a part of the painting that is already dry, in daylight if you can. Evening lamplight will flatter a mismatch and then show it to you the next morning.
Making a Set Last
- Thin coats, twice, beat one thick coat. A heavy first pass wastes paint and takes longer to dry, and it still needs a second coat on the pale colors.
- Work dark to light. Light acrylic covers dark acrylic more easily than the reverse, so this order means fewer repeats and less paint spent fixing things.
- Close every lid. One pot open at a time, and closed the moment you switch.
- Blot the brush before loading. Water carried in from the rinse pot thins the whole pot over the course of an evening.
- Do not tip unused paint back in once it has been on a palette and picked up other colors.
What Is in Our Kits
For reference, since it is the question underneath this one. Our kits ship with a pre-printed cotton canvas rolled in a tube rather than folded, a full set of vacuum-sealed acrylic paints, brushes in a range of sizes and an 11 by 17 inch printed reference. Vacuum sealing is why the paints arrive moist rather than skinned, and it is the reason most people never need a replacement set at all.
The catalog is here, and the beginner's guide covers the working order that makes a set go furthest.
