I was asked to use a hex color in a span class for phone numbers and I am struggling with the logic of it. I won't get into the sudden change, but basically asked to add this <span class="#999993">444-555-1212</span>.

Their goal was to elimate color othere than what is specified in the TD tag as what is displayed on desktop and mobile. I searched the interweb and can not find a reason to put a hex color as a class and this is not defined in the head css. Insights appretiated.