I can think of two ways to do what (I think) you want to do. Both have their advantages.
1) Add a new channel
Once you have your outline from Analyze Particles, invert it (
Edit > Invert ) to get the outlines white on a black background, then merge it back with your original image (
Image > Color > Merge Channels ) selecting appropriate colours. Below I’ve used blobs and have merged the original as greyscale with the overlay as the red channel.
Note you now have a two channel image so you can change the look up table on either as you please or flatten it into an RGB image.
Do the same as above to get your outlines then use the mask (labelled “Drawing of mask” above) to create a selection (
Edit > Selection > Create Selection ), select the original image then restore the selection by running (
Edit > Selection > Restore Selection ) now you can use the selection to create an overlay by running (
Image > Overlay > Add Selection ).
You now have a non-destructive overlay on your original image. A possible advantage of this method is that it doesn’t require a blending of the channels as does the composite above.