The fastest way to change line color in Clip Studio Paint

Open your image in Clip Studio Paint, select the layer with your line art, then go to Layer > Tonal Correction > Hue/Saturation. Move the Hue slider left or right to shift the color across the spectrum. If you want to change only the lines and keep white areas untouched, use Select > By Color to select just the lines first, then apply the same adjustment.

This method works because line art is usually a single color on a transparent background. The Hue/Saturation tool shifts that color without affecting transparency or white space. If your lines are pure black and you want them a different color entirely, you have a few other routes depending on what you're starting with and what result you want.

Key Takeaways

  • Hue/Saturation is the quickest method for shifting line color across the spectrum while keeping the lines' darkness and transparency intact.
  • Use Select by Color before applying Hue/Saturation if your image has white areas you want to protect from color change.
  • The Color Balance tool works well if you want to shift lines toward warm or cool tones without moving them far across the color wheel.
  • Overlay and Multiply blend modes let you colorize lines by painting over them on a new layer, useful when you want to test colors without committing.

Using Hue/Saturation for a full color shift

Hue/Saturation is built into Clip Studio Paint and requires no extra steps. Click on your line art layer in the Layers panel to select it. Then open the menu at the top and choose Layer > Tonal Correction > Hue/Saturation. A dialog box opens with three sliders: Hue, Saturation, and Lightness.

The Hue slider is what you need. Drag it left to shift colors toward blue and purple, or right to shift toward yellow, orange, and red. The slider goes from -180 to +180, so you can rotate through the entire color wheel. Watch the preview in your image as you move it. Once you have the color you want, click OK. The change applies directly to the layer.

This method works best when your lines are already a single color — black, dark gray, or even dark blue. If your lines are pure black and you want them bright red or bright yellow, the result will be a darker version of that color because black has no saturation to shift. For truly bright colors over black lines, use the blend mode method instead.

Protecting white areas with Select by Color

If your image has both black lines and white areas — for example, white highlights or a white background inside the line art — Hue/Saturation will try to shift both. White doesn't have a hue to shift, so it usually stays white, but if you have gray tones or near-white colors, they may shift slightly.

To protect these areas, select only the lines before you apply the adjustment. Go to Select > By Color. Click on one of your black lines in the canvas. Clip Studio Paint selects all pixels of similar color. If the selection is too strict or too loose, adjust the Threshold slider in the tool options at the bottom of the screen — higher threshold means more colors get selected.

Once your lines are selected (you'll see marching ants around them), apply Hue/Saturation as before. Now only the selected lines change color. Click Select > Deselect when you're done to remove the selection outline.

Using Color Balance for warm or cool shifts

Color Balance is another tonal correction tool that works differently from Hue/Saturation. Instead of rotating through the color wheel, it shifts colors toward warm (red, yellow) or cool (blue, cyan) tones. Go to Layer > Tonal Correction > Color Balance.

You'll see three sliders: Cyan-Red, Magenta-Green, and Yellow-Blue. Drag the Cyan-Red slider toward Red to warm up your lines, or toward Cyan to cool them down. Use the other sliders to fine-tune. This method is gentler than Hue/Saturation and works well if you want to shift black lines slightly warmer or cooler without a dramatic color change.

Color Balance is less useful if you want to change black lines to a completely different color like green or purple, because it only shifts along three axes rather than around the full color wheel. For those cases, stick with Hue/Saturation or the blend mode method.

Colorizing lines with blend modes on a new layer

If you want to test colors without permanently changing your line art, or if you want bright colors over dark lines, paint on a new layer above your lines using a blend mode. Create a new layer by going to Layer > New Layer. In the dialog, leave the layer type as Raster. Click OK.

Select a brush and the color you want your lines to be. Paint over the lines on this new layer. The lines won't change yet because you're just painting on top. Now change the blend mode of this new layer. In the Layers panel, find the dropdown that says "Normal" at the top. Click it and choose Overlay or Multiply. Overlay blends the color with the lines while keeping brightness; Multiply darkens and saturates the color more.

If the color is too strong, lower the layer's opacity slider (also in the Layers panel) to make it more transparent. This method is non-destructive — you can delete the color layer anytime and your original lines are unchanged. Once you're happy with the result, you can merge the layers by right-clicking the color layer and choosing Merge Down.

Changing line color on specific areas only

Sometimes you want to change the color of lines in one part of your image but not others. Use the selection tools to isolate the area first. The Free Selection tool (lasso) lets you draw around a region by hand. The Rectangular Selection tool selects a box. Once you have the area selected, apply Hue/Saturation or Color Balance as described above — the adjustment only affects the selected region.

Alternatively, use the Bucket Fill tool with a low opacity to paint color over specific lines. Set the tool's opacity to 30 or 40 percent in the tool options, choose your color, and click on the lines you want to change. This gives you direct control over which lines get colored and how saturated the color is.

Frequently Asked Questions

Can I change line color without affecting the rest of the image?

Yes. Use Select by Color to select only the lines, then apply Hue/Saturation. Or paint on a new layer above the lines using Overlay or Multiply blend mode, which only affects the lines below without touching other layers.

Why do my black lines turn dark gray or dark brown instead of bright red?

Black has no saturation, so Hue/Saturation can only shift it to a dark version of the target color. For bright colors, use the blend mode method: paint the bright color on a new layer set to Overlay or Multiply, then adjust opacity until it looks right.

What's the difference between Overlay and Multiply blend modes?

Multiply darkens the lines more and saturates the color more intensely. Overlay is gentler and preserves more of the original line brightness. Try both and see which look you prefer for your image.

Can I undo a Hue/Saturation change after I close the file?

No, once you save and close, the change is permanent. Before applying Hue/Saturation, save your file, then use File > Save As to save a copy with a new name. Make the color change on the copy so your original stays unchanged.

Do I need to flatten my image before changing line color?

No. Hue/Saturation and Color Balance work on individual layers. Keep your layers separate so you can adjust them independently. Only flatten when you're completely done and ready to export.