Update the color scheme for ethereum.org

[nloureiro]

Is your feature request related to a problem? Please describe.

On the continuous development of the Design system we set a core color scheme that it's works but still needs some improvements

This issue is an exploration of some options to extend and improve the design system, and it's open to anyone that wants to collaborate or give feedback

link to figma file https://www.figma.com/design/tRjUmvmKl9Ns0wdxBEFOLv/DS-color-explorations?node-id=1%3A47&t=yn0vJzXTAHReMV3R-1

[ddannehh]

After dealing with some design tickets I'd like to explore this! I'll try to refine the color system based on a global palette and creating relevant design tokens from this. It's more about a straightforward system than the color palette itself. Let's see where this goes 😅

[TylerAPfledderer]

@nloureiro let me know if I can be of assistance here with the Chakra config!