[Accessibility] [Windows] [Contrast] [Invite screen]- Low contrast in "No, Thanks" and "Yes, Participate" buttons

[ceciliabelem]

Describe the bug
The "No, Thanks" and "Yes, Participate" buttons on the invite screen have a contrast ratio of 2.1:1, which is below the WCAG minimum contrast requirements. This may hinder readability and usability for users with low vision or color blindness, impacting their ability to easily distinguish these options.

Severity: High - This issue presents an accessibility barrier that may prevent users with visual impairments from confidently and accurately navigating through a critical decision point.

To Reproduce
Steps to reproduce the behavior:

1. Open the Muda platform in a Windows environment.
2. Go to the invite screen using this link: https://muda.cambiatus.io/invite/Pzz98P.
3. Observe the contrast of the "No, Thanks" and "Yes, Participate" buttons.

Expected Behavior
The "No, Thanks" and "Yes, Participate" buttons should have a minimum contrast ratio of 3.1:1 to meet WCAG 2.1 criteria, ensuring readability and usability for all users.

Screenshots

Cambiatus Env you are using
https://muda.cambiatus.io/invite/Pzz98P

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome
• Version: 130.0.6723.117
• Screen Reader: NVDA 2024.4

Additional Context
This contrast issue is a WCAG 2.1 criterion violation, specifically under WCAG 1.4.3 Contrast (Minimum), impacting readability for users with low vision and color deficiencies.