Convert HEX To RGB

Here's a small irony about comfyui-custom-node-color: its headline feature is recoloring the nodes themselves, which is pure cosmetics. ConvertHEXToRGB is the part of the pack that actually does work inside a generation graph. It takes a hex string and splits it into the red, green, and blue channels as plain integers, plus a formatted string version. If you've ever needed to feed a color into a node that wants R, G, B as separate numbers instead of #RRGGBB, this is the bridge.

It's a genuinely thin utility, and that's the point. You don't want to hand-roll hex parsing in a Workflow Value node when a purpose-built one already validates and normalizes for you.

How it works

The conversion logic is short enough to read in full on the repo:

hex_color = (hex_color or "#000000").replace("#", "").strip()
if not hex_color or len(hex_color) < 6:
    hex_color = "000000"
hex_color = hex_color[:6].upper()
r = int(hex_color[0:2], 16)
g = int(hex_color[2:4], 16)
b = int(hex_color[4:6], 16)

Strip the #, pad to six characters with zeros, then read each two-character pair as base-16. If the input is garbage - non-hex characters, too short, an actual ValueError - the whole thing collapses to 0, 0, 0 (black) instead of erroring out the workflow. "Fail to black, not fail to crash" is a reasonable trade for a utility node, but it means you should check your source if the color suddenly looks wrong.

Inputs and outputs

One input, four outputs:

• hex_color (STRING, default #000000) - accepts #FF5733 or FF5733, with or without the hash.
• R (INT), G (INT), B (INT) - each channel as 0–255.
• RGB (STRING) - the formatted "255, 87, 51" version, handy when something downstream wants a comma-separated triplet rather than three wires.

Pair it with the same pack's HexColorInput and you get an editable color source feeding numeric channels anywhere they're needed - gradient ramps, solid-color backgrounds, anything that takes per-channel ints.

Installing it

It ships in the same pack as Hex Color Input, so the install is identical:

cd ComfyUI/custom_nodes/
git clone https://github.com/lovelybbq/comfyui-custom-node-color.git

Restart ComfyUI, or search "Custom Node Color" in ComfyUI Manager. No extra dependencies, no model files - the whole pack is JS plus two tiny python classes.

Where people get burned

The one real trap: the converter truncates to the first six characters. Eight-digit hex like #FF5733AA (which some tools use for RGBA with alpha) silently becomes #FF5733, and the alpha is just gone - no warning. You also won't get an error for junk input, just black. So before you assume a color is broken, remember this node leans toward silently normalizing rather than complaining. Check your hex, and if you need alpha, this isn't the node for it.