Named colors do not work prior to iOS 11.0

Hello,

My project is currently build in xcode 10, swift 4.2, minimum target version 11.0 ( All working find! )

After change my minimum target version to 10.0, I got error "Named colors do not work prior to iOS 11.0" which different named colors being used multiple times in Main.storyboard

What can I do to solve this issue?

What I can think of is to changed my named color to custom color in every single view (not effective if I would like to change my color hex)

Or another way would be to create a global color somehow like named color in xcode 10 (never done that) for ios version 10.0, and that might be able to used for xcode 10, how can I do that?

Really appriciate your helps!