Ensure default colour scheme does not impact colour blind users

[arcturus2]

Prerequisites

• [x] Put an X between the brackets on this line if you have done all of the following:
  • Running the latest version of Constellation
  • Attached the Support Package via Help > Support Package`
  • Checked the FAQs: https://github.com/constellation-app/constellation/faq
  • Checked that your issue isn't already filed: https://github.com/constellation-app/constellation/issues
  • Checked that there is not already a module that provides the described functionality: https://github.com/constellation-app/constellation/repositories-catalog

Description

Applications need to be compliant so that colour blind users can use our applications.

For starters, the default colour scheme is blue text on a black background and I think this is an issue.

Awaiting formal guidelines before this can be actioned.

• [x] Check that the current scheme is not suitable for accessibility issues
• [x] Update colour schemes if required.

[github-actions[bot]]

This issue is stale because it has been open for 90 days with no activity. Remove this stale label or comment or this will be closed in another 14 days

[github-actions[bot]]

This issue is stale because it has been open for 6 months with no activity. Consider reviewing and taking an action on this issue.

[github-actions[bot]]

This issue is stale because it has been open for 6 months with no activity. Consider reviewing and taking an action on this issue.

[aldebaran30701]

I feel like the best way to move forward is to do the following.

1. Research colour-blindness compliances
2. Assess current scheme for conformance
3. Quick wins - change graph labels default to white instead of blue. Anything further noted for point 2.
4. Create a scheme using css files to allow easier switching between either a light/dark theme or a high contrast theme.

This would mean that the ticket relating to .css file merging would need to be done prior to consolidating the theme into one file.

[github-actions[bot]]

This issue is stale because it has been open for 6 months with no activity. Consider reviewing and taking an action on this issue.

[github-actions[bot]]

This issue is stale because it has been open for 6 months with no activity. Consider reviewing and taking an action on this issue.

[github-actions[bot]]

This issue is stale because it has been open for 6 months with no activity. Consider reviewing and taking an action on this issue.

[github-actions[bot]]

This issue is stale because it has been open for 6 months with no activity. Consider reviewing and taking an action on this issue.

[HolandCrick]

@aldebaran30701, @Centauri0320001 Thanks a lot for enhancing Colorblind option. Looks like it work well.