Shaikh Ibn ul-‘Uthaymeen rahimahullah said about utensils, pens, and glasses painted gold:
وأما إذا كان مجرد لون فإنه لا بأس به
“If it is simply the color [gold] then there is no harm in this…”
[Majmoo’ al-Fatawa wa-Rasaail (18/71)]
As for if it is gold plated with real gold, then the Scholars mention that it should be avoided. Most Scholars mention it is haram, whereas some say it is allowed if it is a little, but it should be avoided nonetheless to avoid confusion.
It seems that it is simply a gold color because gold plating is expensive.
And Allah knows best
Faisal Ibn Abdul Qaadir Ibn Hassan