Gel pens are the most underrated tool in adult coloring. Metallic gold that actually shimmers. Opaque white that sits on top of dark pencil and glows. Glitter that doesn't look cheap. Neons that practically vibrate off the page. No other coloring medium gives you colors like these — and because gel ink layers on top of everything, you can use them to add accents and highlights after all your other work is done.

They're also surprisingly challenging to use well. Gel ink is thick and viscous, which means it streaks when you try to fill areas with back-and-forth strokes the way you would with a marker. The good news: there's one technique that eliminates nearly all streaking, and once you know it, gel pen art becomes genuinely addictive.

What Makes Gel Pens Different

Unlike ballpoint ink (oil-based, thin) or marker ink (alcohol or water-based), gel ink is a water-based pigment suspended in a thick gel. That thickness is what gives gel pens their distinctive properties:

  • The pigment concentration is high, producing vivid, saturated colors.
  • The ink sits on top of paper rather than soaking in — which is why gel pens write on top of other media like markers and colored pencils.
  • Special effects like glitter, metallic, and opaque whites are possible because the gel carrier can hold particles that liquid inks cannot.
  • The ink dries slower than marker ink, which can cause smearing if you drag your hand across a freshly colored area.

That last point is important: work from top to bottom or left-to-right (depending on your dominant hand) to keep your hand off wet ink. Give completed sections a few seconds to set before resting your wrist on them.

The Circular Stroke Technique

The single most important technique in gel pen art is this: fill areas using small, overlapping circles rather than back-and-forth strokes. Artist Nico Dauk — whose mesmerizing gel pen work has captivated the coloring world — uses this exact method to create streak-free artwork. Her piece "Indecisive" took 28 hours of this careful circular work to complete, and the result looks like it was painted, not drawn with a pen.

Indecisive by Nico Dauk — gel pen art taking 28 hours to complete
"Indecisive" by artist Nico Dauk — 28 hours of gel pen work in tiny circular strokes.

Why does it work? Back-and-forth strokes deposit ink at a different density at the turn points (where you reverse direction), creating visible lighter and darker bands. Small circles distribute ink evenly because there are no turn points — the pen keeps moving in a consistent loop. The individual circles are tiny enough that they become invisible in the filled area.

How to practice: draw a 1-inch square on scrap paper and fill it completely using only tiny circular motions, overlapping each circle slightly. Take your time. The result should be an even, streak-free fill. Once you can do this reliably on small areas, scale up to your actual designs.

Gel Pen Techniques for Adult Coloring

Using Gel Pens as Accents Over Other Media

The most common and effective way to use gel pens in adult coloring is as a finishing layer on top of colored pencils or markers. Once your base coloring is complete and dry, gel pens let you add elements that no other tool can create:

  • White highlights: Use an opaque white gel pen to add light sources, dewdrops, sparkle in eyes, or reflected light on shiny surfaces. A single white dot in the center of a dark-colored flower transforms it.
  • Metallic accents: Gold and silver gel pens add luxury shimmer to jewelry, decorative borders, animal scales, and architectural details.
  • Glitter effects: Glitter gel pens work beautifully on starbursts, fairy wings, cosmic backgrounds, and any design where you want magical sparkle.
  • Fine line details: Most gel pens have a 0.5–1.0mm tip, fine enough to draw veins on leaves, fur texture, delicate lace patterns, or stippling dots.
Pro tip: When adding white gel pen highlights over colored pencil, make sure the pencil layer is fully burnished (smooth and saturated) before applying the gel pen. If the paper still has visible tooth texture, the gel ink can catch and blob. A light buffing with a colorless blender pencil before applying the white pen helps the ink flow more smoothly. Read our guide on white pencil blending techniques for more on this approach.

Gel Pen Art on Dark or Black Paper

Coloring on black paper is one of the best ways to showcase gel pens — especially opaques, metallics, and neons. On white paper, gel pen colors compete with the brightness of the paper. On black, they're the only source of light in the image, and the contrast makes them extraordinary.

Use opaque gel pens in pastels, whites, and vivid primaries to "paint" on black paper as if you're adding light to darkness. Galaxy designs, night sky mandalas, glowing floral patterns, and luminous animal portraits are all stunning in this format. Look for black paper specifically designed for wet media — standard construction paper can curl with gel ink.

Layering Gel Pens

Gel ink layers don't blend the way markers do — wet gel on top of wet gel will mix or smear, so this isn't a blending medium. However, once a layer is dry (give it 30–60 seconds), you can draw over it with another gel pen color for interesting optical effects. Layering a gold metallic over a dry red creates a warm, glowing amber. Layering glitter over a flat color adds dimension without changing the hue.

Stippling with Gel Pens

Stippling — filling an area with small dots — works beautifully with gel pens because the ink dots are perfectly round and consistent. Dense stippling creates dark values; spread-out dots create lighter tones. Combine different stipple densities to create gradients and shading that look remarkably sophisticated. This technique is especially effective on floral and botanical designs.

Best Gel Pens for Adult Coloring

Sakura Gelly Roll — Best Overall

Sakura Gelly Roll has been the benchmark for quality gel pens for decades, and for good reason: the ink is consistent, the flow is reliable, and the opaque white is genuinely opaque in a way most competitors can't match. Available in Classic (standard colors), Metallic, Glitter, Moonlight (neon opaque), Stardust (glitter), and several other specialty lines — buying a sampler of several Gelly Roll varieties gives you a versatile starter set that covers almost every gel pen effect.

View Sakura Gelly Roll on Amazon

Pentel Sunburst Metallic Gel Pens — Best Metallics

For metallic gel pens specifically, Pentel Sunburst outperforms Gelly Roll. The metallic particles are finer and more reflective, producing a richer shimmer in gold, silver, copper, and eight other shades. The flow is smooth and consistent, with less skipping than most metallics. These are what you reach for when metallic is the main event — mandala highlights, decorative borders, and designs with significant metallic coverage.

View Pentel Sunburst on Amazon

Shuttle Art 120-Color Set — Best Value Set

If you want to experiment across the full spectrum of gel pen types without spending a fortune, the Shuttle Art 120-count is the most complete starter set available. It includes metallic, glitter, neon, pastel, and standard colors — enough variety to learn what types of gel pens you enjoy most before investing in premium single-brand sets.

View Shuttle Art 120-Set on Amazon

Sakura Stardust Galaxy Pens — Best Glitter

The Stardust line from Sakura uses a metallic sparkle (not chunky craft glitter) that creates an elegant dimensional shimmer without looking tacky. The sparkle effect is more refined than standard glitter gel pens and works beautifully in night sky designs, galaxy mandalas, and any project where you want sparkle that still looks artistic. The ink doesn't smear or bleed as much as some glitter pens either.

View Sakura Stardust on Amazon

Troubleshooting Common Gel Pen Problems

Skipping and blobbing: Gel pens skip when the tip dries out between uses or when air bubbles get trapped in the ink reservoir. Fix: hold the pen tip downward and press gently on scrap paper to get ink flowing. Store pens horizontally or tip-down to prevent the ink from settling away from the tip.

Streaking: Caused by back-and-forth strokes. Switch to the circular motion technique described above.

Ink smearing: You're moving your hand over wet ink. Work from the corner of the page furthest from your dominant hand, and give completed sections 30–60 seconds before resting on them.

Dried-out pens: Unlike fineliners (which often can't be revived), dried gel pens sometimes respond to soaking the tip in warm water for a few minutes, then pressing on scrap paper. This works best when the pen is newer and the ink reservoir isn't fully empty.

Pairing Gel Pens with Other Coloring Media

Gel pens work best as the final layer in mixed media projects because their ink sits on top of everything. Here are the most effective combinations:

  • Colored pencils + gel pens: Complete your pencil coloring first, then add metallic accents, glitter highlights, and white sparkle with gel pens. This is the most popular combination and works on any design.
  • Alcohol markers + gel pens: Use markers for large areas of vivid, even color, then add fine line details, white reflections, and metallic accents with gel pens. Ensure marker ink is fully dry before applying gel pens over it.
  • Fineliners + gel pens: Draw stippled texture or hatching details with a fineliner, then layer gel pen metallics or neons for a graphic, high-contrast look.

For more on building a complete toolkit that incorporates gel pens, read our guide to 11 must-have coloring supplies for adults and our overview of how to choose the right coloring tool for different project types.

Ready to put gel pens to work? Browse our free printable coloring pages — mandala designs, botanical illustrations, and intricate patterns are all perfect candidates for gel pen accents. For more inspiration, explore our inspiration gallery to see what other colorists are creating.