Design question

1 - Accessibility How do you deal psychologically/what's your thoughts with the fact that people use a lot the orange bitcoin F7931A from the logo for a lot of websites, products, and with white text is not accessible and usually with black (Black text on orange background) is ugly?

2 - Best example of UX and UI in wallets What is your favourite reference on wallet design regarding:

• Changing from Lighting to Onchain
• Display units and changing from USD to BTC (Input of the amount you want to send). Sometimes you want to send 50$ sometimes a clear BTC amount.

Thank you.