"If" the knife is to be carried in the field, a bit of red "might" help to locate it if it is somehow dropped or set aside.
Have not seen a way to install an "Air Tag" or other geolocation feature in the knives yet...maybe something for the future.
As for color combinations, it comes down to personal taste...all the comments above are good ones, but I find that once I have one setup, something else comes along and is also appealing.
Larry
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Larry W. Williams
RKCC #CM-041
ABKA #046
RKS #1246