Changing the colour of specific sections of a string

[1waffle1 (Waffle)]

A new sequence type would fit here,
gui.Text = "Hello world
gui.TextColors = TextColorSequence.new({6}, {Color3.new(1, 0, 0), Color3.new(0, 0, 1)})
where each number indicates the character index in the text where the color changes to the next value in the list of colors. This would be a property of GUIs that have text.