To what? They look the same to me.
I see left to right: red, brown, green. They used to be red, yellow, green.
You may want to color balance the monitor again. Seems the chroma or brightness has changed
Sometimes, I’ve found that after a system update, color calibration resets back to its default.
Fortunately, there is a simple fix. Open System Preferences and select Displays. Go to the Color tab. Select a profile that isn’t already selected. Then re-select the one you were using.