When Two Paint Colors Look Identical: Telling Similar Shades Apart
You open a kit, line up the pots, and two of them look exactly the same. Pot 8 and pot 9, side by side, identical. You're afraid to start because one wrong dab feels permanent.
In short, don't trust your eyes. Instead, dab a little of each pot on scrap paper, let it dry fully, and check the dry swatches against the kit's numbered reference card under bright daylight. As a result, nine times out of ten the chart settles it. Either the shades really are different, the gap is too small to matter, or it's simply an extra pot of a color you use a lot. Below is how to tell which case you're in and what to do about each.
Key Takeaways
- Don't judge wet paint. Acrylic dries noticeably darker as the milky binder turns clear, so two wet pots that look alike can separate once they're dry (Just Paint, Golden Artist Colors' technical publication).
- Swatch both pots on scrap, let them dry, then read them against the printed reference card. The chart, not your eyes, tells you the intended color flow.
- Lighting lies. Dim, yellow, low-CRI bulbs flatten subtle differences; a daylight-balanced source near a CRI of 100 shows colors close to true (RP Photonics encyclopedia).
- The tiny numbers printed on pots rub off easily. Label each pot the moment you identify it so the problem doesn't come back mid-painting.
- Sometimes it's not your eyes at all. A "duplicate" pot is often just an extra of a high-use color, not two different numbers.
Why do two paint by numbers colors look the same?
Before you fix anything, it helps to know which of three things is actually happening. Each has a different cure, so naming the cause first saves you from chasing the wrong one. In our experience helping painters, almost every case fits one of these three.
Close-but-distinct shades: the usual culprit
Most of the time, the two pots really are different numbers. They're just close. For example, light blues, soft grays, and skin tones cluster tightly on the color wheel, because a painting needs many small steps between them. In the pot, wet and glossy, a half-step of difference disappears. On the dry canvas, however, sitting next to its neighbors, that same half-step reads clearly. So the gap is real; you just can't see it yet.
Your lighting, not the paint
Sometimes the paints are genuinely distinct and your room is hiding it. For instance, warm, dim, or cheap bulbs compress the part of the spectrum where subtle shades live. As a result, two colors that differ under daylight collapse into one under a lamp. We cover the fix below, but keep it in mind: the problem might be the light switch, not the pot.
A genuine kit discrepancy, and why an "extra" pot is usually harmless
Occasionally it's the kit. For instance, a pot may have dried out, or two pots really do carry the same color. Here's the reassuring part, and it's what we tell most customers who write in. More often than not, that "duplicate" is simply a second pot of a high-use color (sky blue, background white) split across two containers so you don't run short. In other words, it's not two different numbers fighting for one spot. The chart will confirm it in seconds.
The swatch test: dab, dry, and compare to the card
This is the method that resolves almost every case. Specifically, it works because wet paint and dry paint are not the same color, and the kit already gives you the answer key.
First, dab a small amount of each pot onto a scrap of paper or cardboard. Label which dab came from which pot right away: a pencil mark beside each is enough. Then let them dry completely. This step matters more than it sounds. Specifically, acrylic paint darkens as it dries, because the binder starts out milky-white and turns clear, deepening the pigment underneath (Just Paint, Golden Artist Colors' technical publication). Wet swatches lie. As a result, two pots that look identical wet often pull apart once the sheen is gone.
Color shift is the term for how acrylic deepens between wet and dry. The binder dries from milky to transparent, so the pigment beneath reads darker once cured. That's why a swatch is the only honest test: it lets each pot finish its color shift before you compare them, instead of judging two glossy, wet pots that haven't settled yet. Two shades a half-step apart often look the same wet, then visibly separate dry. So always wait for the dabs to lose their sheen, in a warm room, before you draw any conclusion. Rushing the comparison is the single most common reason painters decide, wrongly, that two distinct pots are identical. Give it the few minutes it needs and the answer usually reveals itself.
Once the swatches are dry, hold them against the kit's printed reference card. The card shows where each number is meant to go, so you can trace the intended flow of colors. What if two dry swatches still look the same? Then the chart tells you whether they belong in different regions, which means the small difference matters, or in the same region, which means it barely does. Either way, you stop guessing.
Does lighting change how the colors look?
Yes, and more than most people expect. The same two pots can look identical in one room and clearly different in another. In fact, the difference is the light, not the paint.
Dim, yellow, or low-quality bulbs render color poorly. CRI, the color rendering index, is a measure of how faithfully a light source shows colors compared with daylight, which scores a perfect 100 (RP Photonics encyclopedia). A low-CRI bulb leaves gaps in the spectrum, so subtle shades that differ in daylight read as one. In contrast, a high-CRI, daylight-balanced source closes those gaps and reveals the true difference.
Therefore, compare your swatches in direct daylight by a window, or under a daylight lamp. Tilt each pot, too: angling it catches the pigment and helps the shade show. For example, if you paint at night or in a dim corner, a daylight LED magnifying glass does both jobs at once, throwing clean bright light while it enlarges the detail. You'll find more of these in our accessories collection.
Why two pots can look the same, and the fix for each
Here's the whole problem on one screen. Match the tell you're seeing to its cause, then run the fix. In our experience, most readers land in the first two rows.
| What you're seeing | Likely cause | The fix |
|---|---|---|
| Two pots look identical, even dry | Two near-distinct shades | Swatch and dry both, then read them against the printed chart |
| Wet dabs look the same | Wet paint hasn't darkened yet | Let the swatches dry fully; expect them to deepen and separate |
| Different in daylight, same indoors | Yellow or dim, low-CRI lighting | Switch to bright daylight or a daylight lamp |
| Can't read the pot numbers | Printed numbers rubbed off | Label each pot the moment you identify it |
| One pot is gummy or truly the same color | A dried-up or duplicate pot | Confirm against the chart, then fix or replace it |
| Still no visible difference | Shades are genuinely a hair apart | Pick the better fit, or nudge one shade with a touch of white or black |
If you reach that last row, relax. As painters often put it, no one will spot the difference without staring for half an hour. So choose the shade that best fits the picture and keep going.
Label your pots and paint dark-to-light
Two small habits stop this problem from coming back. The first is labeling. Notably, those printed pot numbers are tiny and they rub off fast. That's why our kits come with a sheet of numbered stickers. Peel each one and press it onto its matching pot, so the number stays put and the pots never get mixed up. If you're using another brand's kit, write the number on each pot with a marker instead. Either way, future-you won't have to re-run the swatch test halfway through.
There's a related trick for near-identical light shades. Before you paint, cover the printed numbers in those light regions with a white paint pen or a thin coat of diluted gesso, so they don't bleed through your top color. For example, we walk through that in our guides on stopping numbers showing through and hiding numbers for a flawless finish.
The second habit is order. Paint dark colors first and work toward the light ones. Darker shades cover earlier slips cleanly, so if you do put a near-match in the wrong spot, a later, deeper color often hides it. As a result, a small change to your sequence quietly forgives a lot of mistakes.
How we make this easier
We try to take the guesswork out before a pot ever opens. For example, across our kits we ship high-opacity paint, so even a close-match shade covers cleanly and reads true on the canvas, instead of going muddy or translucent. In addition, our color preview before order lets you see how the shades sit side by side in your specific design. As a result, near-matches are no surprise.
Accessories like a daylight magnifier round it out, part of the premium materials we build every kit around. None of it replaces the swatch test. That said, from our work with thousands of painters, it stacks the odds in your favor from the very first pot.
Reviewed by the Davincified editorial team. Have a two-pots-look-identical case we didn't cover? Contact us. We keep this guide updated as new fixes come in from painters.
Frequently Asked Questions
Usually they're two genuinely different numbers that sit close together: light blues, grays, and skin tones especially. Wet and glossy in the pot, a small difference disappears; on the dry canvas it shows. Acrylic also darkens as it dries (Just Paint, Golden Artist Colors), so wet pots mislead you. Swatch and dry both, then check the chart.
Dab a little of each onto scrap paper, label which is which, and let the swatches dry completely. Then hold them against the kit's printed reference card under bright daylight. The dry swatches separate when the wet ones didn't, and the chart shows where each number belongs in the finished image.
Often, yes. When a design uses a lot of one color (a big sky or a white background), kits split that color across two pots so you don't run short. It looks like a duplicate but it's a single number with extra paint. Check the chart to confirm it's not two distinct numbers before you worry.
Direct daylight, or a daylight-balanced lamp with a high color rendering index. CRI measures how faithfully a light shows color against daylight's perfect 100 (RP Photonics). Dim, yellow, low-CRI bulbs flatten subtle differences, so two distinct shades read as one. Move to a window or a daylight lamp before deciding the pots match.
Then it barely matters. If two dry swatches look the same even in good light, pick the shade that best fits that part of the picture and move on. No one notices a half-step gap without staring. If you'd rather force a distinction, nudge one pot with a touch of white or black to create a subtle difference yourself.
