https://github.com/GrapesJS/grapesjs/blob/f59e981f76ff378f59c06cf706af88e502db098e/packages/core/src/utils/ColorPicker.ts#L2407C5-L2415C6
I traced back to these lines and seems like when converting HEXA to RGBA theese lines mess up results.
Is there particular reason to intentionally support legacy ARGB?