Bug Fix: Storybook docs colors not updating with Themes

[Jainex17]

Explanation

In the Storybook documentation, there was a bug causing colors to not update when switching themes. Specifically, the text color was not rendering properly for the dark theme when it was set to the default color.

Change Made

1. In the ./colors.scss file, the value of --color-text-default was set to white, which was causing the problem. I replaced this value with --brand-colors-grey-grey600, which resolved the issue.

Additionally, I took care to ensure that this change does not impact other components or functionalities of the system.

• Fixes [Bug]: Storybook docs colors are not updated with Themes #19671

Screenshots/Screencaps

Before

After

Manual Testing Steps

• Navigate to the Storybook Component Library.
• Within the ComponentLibrary, locate and access the Text component.
• Open the documentation section for the Text component.
• Switch the theme to the dark mode.
• Observe the colors in the documentation and verify that they update correctly according to the selected dark theme.
• Specifically, pay attention to the text color when it is set to the default value, ensuring it renders properly in the dark mode.

Pre-merge author checklist

• I've clearly explained:
  • What problem this PR is solving
  • How this problem was solved
  • How reviewers can test my changes
• Sufficient automated test coverage has been added

Pre-merge reviewer checklist

• Manual testing (e.g. pull and build branch, run in browser, test code being changed)
• PR is linked to the appropriate GitHub issue
• IF this PR fixes a bug in the release milestone, add this PR to the release milestone

[github-actions]

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[georgewrmarshall]

Hi @Jainex17, thanks for your contribution but we do not want to update the CSS here I think the solution should be something to do with storybook and the dark mode storybook plugin hipstersmoothie/storybook-dark-mode#180