Thanks everyone for submitting your challenge results. For this theme, I chose something very basic, the color "yellow". It's a tricky color for me, so let's see what you've got!
An interesting exterior wall decoration at the Big Wheel Bikes store in Old Town Alexandria. This bike has been hanging there for many years, and I photographed it repeatedly with different cameras and lenses. It was taken down a couple of weeks ago...
Nikon Df, Voigtländer Color-Skopar 28mm F2.8 Aspherical SL II S, 1/125 sec, f/5.6, ISO 200 (Old Town Alexandria, Virginia, November 2021)
When walking around the Spoorwegmuseum in Utrecht (The Netherlands) you can view many old and new trains and train equipment used throughout history. If you look closely, you can find all sorts of interesting (technical) details, like this part of the "Mat '64" (Material 1964) trains. By the way, in The Netherlands these trains are better known as the "stoptrein" (standard local train).
Though this thing is usually orange/vermilion, I coulnd't resist shifting the color... maybe it can be understood :D
Something about a song about a submarine? :)