You can set the icon but setting the color too would make those nodes easier to follow without having to click the node.
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Yes. The reason we don't allow changing the colour of nodes is that we do allow you to change everything else...ie the label and the icon and the size, so the colour may well be the only way to guess what a node is when trying to quickly "read" a flow.
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@dceejay - I think this was a failure on my part to communicate correctly. This feature would help a lot when quickly ready a flow. I will add another picture, the original, that does not have the link in / out / call manually colored by me.
You can see that this is much harder to quickly read then the one I have the color edited in.
You know you can show labels & set them to something that that makes it clearer what goes where.
Additionally, you could put the link nodes inside a group and set any colour you wish.
Thanks for the suggestions while they are good ideas they are nowhere as clean and take a few more steps. If choosing color / colour on the link nodes was added, people who don't want to use it don't have too those who would like to use the feature can.
I think the problem with this FR is that its a slippery slope for the devs and crosses a line in the UI scheme.
However 
link nodes are different from other nodes and are already treated differently
I'd love to see it implemented
But I'm going to have a little play with Steve's suggestion of sticking them in a group and see what that looks like
Having each link node in a group of it's own does let you colour code them but I think it takes up too much real estate.
It also looks uncomfortably like an elastoplast!
One way to implement the original request:
If the link nodes had an optional CSS class (cf dashboard nodes) you could style them eg
.red-ui-flow-node .red {
stroke: red;
stroke-width: 2;
}
.red-ui-flow-node .redgreen {
stroke: red;
stroke-width: 2;
fill: aquamarine;
}
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I like the idea of color coding them in theory, but I don't know that it would work as well in practice, compared to labels. Before labels I had a setup like this:
Now I think this is easier to understand:
Although I have messed around using empty subflows as color tags like this:
@HaroldPetersInskipp - I guessed a little at your flow, in my edit, but this shows how color could simplify readability with your great example.
I think this would be beneficial with or with out labels.
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I think this really is a good example of the benefits of link colouring
Having just the icon coloured is a VERY good idea
I've messed around with placing coloured subflows on top of link nodes and then grouping them - looks OK but time consuming and only suitable for a very stable project
Colouring just the icon for link nodes looks outstanding, I think it would be a big enhancement.
Link nodes can be given a distinctive appearance to indicate their special "invisible wires" function and the colour can indicate the matching link. Or, I suppose, mislead if you get the colours wrong.
No idea how easy it would be to code of course.
wouldn't it be nicer and fool proof if the color of the Link In node could change automatically to the color of Link Out Node ?
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Until you want to wire it to more than one.
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should still be same color, since link out is same ?
oh... you mean link out is several and link in is one ? get it.. 
rainbow color 
may be.
Honestly, that mock-up looks really nice. Maybe it's better in practice then I thought, since labels can still be used anyway.
Used the "group nodes" concept for my cheerlight bot flow
Works well and should help considerably to work out with what goes on when I try and amend it in future
Node and WIRE coloring would be fantastic.
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