[Accessibility] [Contrast] inherent contrast in the "I'm aready a member" button

[ceciliabelem]

Describe the bug
The contrast in the button "I'm already a member" has 2.1:1 contrast, instead 3:1. It may work change de tone of orange.

To Reproduce
Steps to reproduce the behavior:

1. Go to '(https://muda.cambiatus.io/join?redirect=%2Fdashboard)'
2. Run Colour Contrast Analyser (CCA)
3. See error

Expected behavior
The contrast must be 3:1 at least

Screenshots

Desktop (please complete the following information):

• OS:Windows
• Browser Chrome
• Version 129.0.6668.101 (Versão oficial) 64 bits

Additional context
Add any other context about the problem here.

[ceciliabelem]

For mapping all defects statistics, I just updated the spreadsheet. Also, there is a graphic to help understand some kinds of bugs and how they can impact users.
Muda's Report Spreadsheet