As an artist who works in both gouache and oil paints, I often get asked: “What’s the difference?” or “What even IS gouache? I’ve never heard of it.” On the surface, both are paints that make beautiful artwork. But in practice, they couldn’t feel more different—and I love them both for unique reasons.
Let’s break it down.
What is Gouache?
Think of gouache as watercolor’s bold older sibling. It’s water-based, matte, and dries quickly, but unlike watercolor, gouache is opaque and velvety. I love using it for pieces where I want vibrant color with a soft, flat finish. It’s portable and forgiving, you can add layers, paint over mistakes, and keep experimenting without waiting hours for it to dry.
For me, gouache is great for capturing inspiration in the moment. If I’m traveling or just want to dive into an idea without a long setup, gouache is my go-to.
What is Oil Paint?
Oil paint is the diva of the paint worn... in the best possible way. It’s slow-drying, rich, and buttery, giving me endless time to blend, refine, and create depth. Oils have a luminous quality that feels timeless. It’s no surprise they’ve been used by masters for centuries.
When I work in oils, it feels like a commitment. The layers build over time, the textures grow, and the finished piece carries a sense of permanence. Where gouache feels spontaneous, oils feel deep and deliberate. That being said, I must place oil as my all time favorite medium to work with.
Key Differences Between Gouache and Oil Paints
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Drying Time: Gouache dries in minutes; oil can take days (most often, weeks).
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Finish: Gouache is matte and flat; oil is glossy, textured, and layered.
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Flexibility: Gouache is great for quick studies or bold color play; oils shine for detailed, dimensional works.
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Durability: Oil paintings can last centuries if cared for; gouache is more delicate and usually framed under glass or protected with wax medium.
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Personality: Gouache is playful and experimental; oil is rich, moody, and enduring.
Why I Use Both
For me, choosing between gouache and oil isn’t about one being “better.” It’s about mood and purpose. If I’m chasing a spark of inspiration, I’ll reach for gouache. If I want to dive deep into a painting that unfolds slowly, I’ll pull out the oils.
Both mediums feed different sides of my creativity, and I love that I don’t have to choose. Sometimes I even combine elements across mediums, because who says an artist has to play by one set of rules?
Final Thoughts
Whether you’re an art collector, a curious beginner, or just someone who loves learning about creative tools, understanding the differences between gouache and oil paints makes you appreciate each piece more.
And if you’re ever in Tallahassee and want to see resin, gouache, and oil paintings side by side, you know where to find me. Reach out to me at whitmercerart@gmail.com if you are interested in a gouache or oil painting of your own!