Two Watercolor Mistakes That Are Easier to Fix Than You Think

Watercolor feels different from other paints, and sometimes more intimidating. Many people tell me they avoid watercolor because they’re scared to mess up. I get it! It feels like once the paint touches the paper, that’s it. But guess what? That’s only half true.

In this post, I’m sharing two common watercolor mistakes and how to fix them step-by-step. Grab your supplies and follow along with me!

Understanding Watercolor’s Challenges

Let’s talk about why watercolor seems scary. For many artists used to acrylics or oils, watercolor feels like a one-shot deal. But that’s not the full story.

I’ve had so many chats with acrylic and oil painters who say, “If I mess up, I just paint over it.” That’s not as easy with watercolor, right? 

While it’s true that you can’t simply paint over mistakes, you can fix many of them. It’s all about knowing the right techniques—and that’s what I’ll show you today.

Watercolor’s challenges

Mistake #1: Painting Too Dark Too Soon

We’ve all done it—added too much paint and ended up with a dark, blotchy spot. This happens a lot, especially when you’re just starting.

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Why Light-to-Dark Matters

In watercolor, we work from light to dark. That’s one of the key things that makes it special. But when you’re beginning, it’s hard to know how much paint to use. 

Sometimes, you keep adding more and more pigment, and then… it’s too dark. I’ve been there many times.

Let me show you exactly how that looks—and what to do about it.

How I Fix an Area That’s Too Dark

Let’s say I’m painting a leaf. I mix some green with rose, trying to add depth. But then I realize—oops!—I forgot to leave white space or add lighter colors. Now, that leaf doesn’t match the others.

The leaf doesn’t match the others

Here’s how I fix it step-by-step:

1. Dab with a Napkin Right Away

  • First, I grab a clean napkin.
  • I gently dab the spot while it’s still wet.
  • This lifts quite a bit of the color!
Dab with a napkin

This trick only works if the paint is still damp, so timing is key. Be quick!

The result of solution 1

2. Use Clean Water to Reactivate and Lift

If the napkin didn’t remove enough pigment, I move on to the next step:

  • I rinse my brush thoroughly in clean water.
Rinse the brush in water
  • Then, I paint clean water over the dark area.
Paint clean water over the dark area
  • While it’s still wet, I dab again with a napkin.
Dab again with a napkin

You’ll be amazed at how much color lifts this way! It lightens the area without ruining the paper.

The result after solution 2

3. Use a Clean, Dry Brush

There’s another method that works, too:

  • I clean my brush and then dry it completely.
  • Then, I gently brush over the area
Lift off the paint with paintbrush

The brush acts like a sponge and pulls pigment off the paper. This works well even if you missed the first chance to dab with a napkin.

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The result after solution 3

Restoring Lightness and Detail

Once I’ve lightened the area, I can fix the details:

  • I pick a lighter color and add it on top.
Choose a lighter color
  • I reintroduce white space if needed.
  • I blend it with the rest of the painting.
Paint the lighter color on top

Remember, watercolor is all about layering. Don’t be afraid to build your colors slowly and adjust as you go. These small fixes can save a painting!

After blending the lighter color
Finish fixing mistake 1

Mistake #2: Accidental Paint Marks

Let’s talk about another mistake I often make—especially when I’m “in the zone.” I get so focused that I accidentally leave a smudge or dot of paint somewhere I didn’t plan.

Why These Marks Happen

Sometimes, my hand touches wet paint. Or maybe my brush drips. Before I notice, there’s an unwanted mark on my paper. It’s annoying—but fixable!

If you notice it immediately and it’s still wet, the napkin trick works. But what if it’s already dry?

Unwanted mark

How I Fix a Dried Paint Mark

Here’s my go-to method when I discover a dry paint splotch:

1. Add Clean Water to the Area

  • First, I rinse my brush in dirty water to remove paint.
  • Then, I dip it into clean water.
Rinse the brush and dip into water
  • I paint over the mark with a lot of clean water.
Put water on the spot and blend
  • I find a fresh spot on my napkin.
  • I gently press and lift the water and pigment.
Dab with a napkin

Even on dry paint, this method lifts color. It might not erase the mark completely, but it can fade it significantly.

The result after solution 1

2. Turn the Mistake into a Design

Sometimes, no matter how hard I try, a spot won’t go away completely—especially if I use a dark color like deep green.

When that happens, instead of fighting the mark, I work with it.

  • I might paint a leaf or petal over it.
  • I adjust the composition so the mark becomes part of the artwork.
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Since I was painting florals, I just added a leaf over the spot. Done!

Work with the mark

I used to feel frustrated by these mistakes. But now, I treat them as challenges. Every time I fix or adapt something, I learn more. I’ve even stopped throwing away paintings—I just rework them into something I like.

The result of solution 2

Keep a Creative Mindset

In watercolor, it helps to stay flexible. I’ve learned that messing up isn’t the end—it’s a chance to be more creative.

One of my favorite quotes comes from Bob Ross: “We don’t make mistakes, we have happy little accidents.” That changed the way I paint.

Now, when something unexpected happens, I take a step back and think: how can I use this? That mindset lets me enjoy the process and trust my creativity.

Wrapping Up

Mistakes happen—that’s part of watercolor. But the two most common ones—painting too dark and leaving stray marks—can be fixed. If not, you can work with them and turn them into something beautiful. 

So next time your painting doesn’t go as planned, try these techniques. What’s one watercolor mistake you’ve learned to fix creatively? Share it with me below—I’d love to hear!