💀Image Adjustment Color

Here's the odd one. 💀Image Adjustment in the S4Tool-Image pack adjusts an image's brightness, contrast, and saturation. 💀Image Adjustment Color takes those exact same controls and applies them to a hex color string, outputting another hex string. No image involved anywhere. It's a color-math utility hiding in an image pack, and it's the kind of node you don't need often but are glad exists when you do.

The mechanism is simple color-space arithmetic: the input hex is converted to RGB, brightness and contrast are applied in RGB space, saturation in HSV space, then it's converted back to a hex string. The color_hex and overlay_percent inputs work the same way as the image version - they mix a wash of color_hex into the result at the given percentage.

Inputs and output

• input_color_hex - the color to adjust (default #FF0000).
• brightness, contrast, saturation - −100 to +100 sliders, default 0, same semantics as the image node.
• color_hex + overlay_percent - optional tint/overlay applied to the result.

Output: adjusted_color_hex (STRING). That's it - a new hex you can feed into any color string input: a background color widget, a gradient endpoint, a mask fill, or another palette node.

Where it earns its keep: building color variations programmatically. You extract a color from a reference (say, via 💀Image Primary Color), run a few of these in parallel to brighten and darken copies, and you've got a tonal family without ever touching an image editor. It's also handy in workflow templates where a color needs a "darkened version for the text" and a "lighter version for the panel" without hardcoding.

Install

Standard pack install:

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

Or ComfyUI Manager → search "S4Tool-Image" → Install → restart. No models, no downloads.

Gotchas

• It outputs text, not an image - don't wire it into an IMAGE input and wonder why nothing happens.
• The sibling mix-up - if you meant to adjust a picture, use 💀Image Adjustment. This node only ever touches a color string.
• Contrast semantics on a single color - contrast on one hex value is a stretch/shrink around gray; the effect is subtler than on a full image, so don't expect dramatic shifts.

It's a niche tool with a tiny footprint, but for color-system automation it closes a gap: a color, adjusted, as data - not as pixels.