Pewter-Tone Metal
canva.com tells us:
"Named for the metal which is comprised primarily of tin, pewter is a darker shade of gray.
"Pewter retains the gray characteristics of neutrality and seriousness, and its darker hue conveys a certain weightiness.
"As a neutral color, it plays well with every color in the spectrum. But when using pewter in design, balance its depth with a lighter color, such as creams and light grays for the best effect."