ArchAi3D_Average_Color

Simple node, simple job: feed it an image and it computes the mean RGB color across the whole thing, then hands you that color as a hex code and a human-readable RGB string. The author built it for a specific purpose - feeding the dominant color of a reference image into the pack's own Mask to Position Guide node's custom_hex color inputs - but it's a general enough utility that you'll find other uses: matching a generated image's base tone to a reference, sanity-checking a color grade, or driving a tint value downstream.

One required input, image (an IMAGE tensor). Two outputs:

• hex_color - the average as an uppercase hex string like A3B5C7 (note: no # prefix, which is what the position-guide node's hex inputs expect).
• rgb_values - the same number as text: R:163, G:181, B:199.

Mechanically it's a mean across the height and width axes of the (first) image in the batch, converted from the 0-1 tensor range to 0-255 and clamped. Nothing clever, nothing hidden - and that's the appeal.

Installation

It ships in ComfyUI-ArchAi3d-Qwen. ComfyUI Manager ("ArchAi3d Qwen") or:

cd ComfyUI/custom_nodes/
git clone https://github.com/amir84ferdos/ComfyUI-ArchAi3d-Qwen.git
cd ComfyUI-ArchAi3d-Qwen
pip install -r requirements.txt

Restart, and it's under ArchAi3d/Utils. Free for personal use; commercial use needs the author's license.

Where people get burned

"Average" means exactly that - a busy image with red furniture and blue walls averages out to a muddy purple that isn't any color in the image. If you want a dominant color (the color that best represents the image), an average is the wrong tool; use a palette-extraction node instead. And since it takes the first frame of a batch, feeding it a multi-image batch silently uses only the first one - fine for single-image use, surprising if you thought you were averaging a whole set. It's a tiny helper, but in the right spot - like matching a color-corrected image's overall cast back to a reference - it saves you from doing the math in your head.