💀Image Color

Every workflow hits the moment where you need an image that isn't generated - a flat background to composite something onto, a gradient for a title card, a solid color to feed a mask or a VAE. ComfyUI's core has a few ways to fake this and they're all fiddly. 💀Image Color from the S4Tool-Image pack just hands you a canvas, in any size and any color, with gradients as a bonus. It's the node you reach for when you want a placeholder and don't want to think about it.

This is one of the pack's 23-ish image utilities from S4MUEL-404 (find them all under the 💀S4Tool category). It's pure Pillow/numpy under the hood - no model, no VRAM, no download. You set a size, pick a color, and out comes a tensor that behaves like any other IMAGE output in ComfyUI, so it wires straight into compositing, masking, and VAE encode nodes.

Inputs that actually matter

The full list is small and self-explanatory. You'll set three of them:

• width / height - canvas size in pixels, 1 to 4096, default 512. If you're making a background for a specific generation, match your latent size here.
• color_hex - the fill color as a hex string like #FFFFFF. This is the base color for a solid image and the background when gradients are off.

Then, if you want a gradient instead of a flat fill, flip gradient_enabled to true and set gradient_start_hex and gradient_end_hex. Two extras worth knowing: gradient_start_alpha and gradient_end_alpha (0–100) let each end fade toward transparent, and gradient_angle (0–360) rotates the direction - 0 puts start on the left, 90 runs top to bottom. So a translucent gradient overlay is one node, no extra alpha plumbing.

The single output is image (an IMAGE tensor), ready to feed a composite, an Image Mask, or Save Image. Note there's no alpha output on this node - the alpha values bake into the pixels, so transparency shows up in whatever you composite onto.

Install

The whole pack comes from one repo, so you get this node when you install the pack:

cd ComfyUI/custom_nodes/
git clone https://github.com/S4MUEL-404/ComfyUI-S4Tool-Image.git
pip install -r ComfyUI-S4Tool-Image/requirements.txt

Or skip all that: ComfyUI Manager → search "S4Tool-Image" → Install, then restart. Because the pack auto-checks its dependencies and logs the verdict in the terminal at startup, you'll see a "PRODUCTION READY" line when things are healthy.

Gotchas

This node is about as safe as it gets - no model files, no heavy imports beyond Pillow. The one real footgun is hex format: the node expects the #RRGGBB form. It's tolerant in places, but get in the habit of writing the full six digits. And remember the size range caps at 4096 per side; if you genuinely need a bigger background, make it at 4096 and upscale. If you want a transparent canvas rather than a colored one, the same pack has 💀Image Board for exactly that, and it plays nicely alongside this node.