Adaptive node titles
Title text picks white or dark by itself so it stays readable on any colour.
A canvas tool: there is no node to add. It is part of the ComfyUI canvas once Pixaroma is installed.
What it does
When you colour a node, the title text works out whether white or dark reads better against that colour and switches automatically. A pale yellow node gets dark text, a deep blue one gets white.
Nodes 2.0
The tab under a coloured node (Show advanced inputs, or Enter on a subgraph) is painted in the node colour too, so its text follows the same rule. An uncoloured node keeps ComfyUI's own grey there.
Handy to know
It is on by default. Turn it off in Settings and titles go back to ComfyUI's usual grey, which can be hard to read on a light node colour.
This is why you can recolour freely without ever ending up with a title you cannot read.
This is the help that comes with Pixaroma 1.4.212. Inside ComfyUI, select the node and click the orange ? above it to read the same help there.