PR: Change colors for kernel errors in IPython console

[juanis2112]

Description of Changes

• Wrote at least one-line docstrings (for any new functions)
• Added unit test(s) covering the changes (if testable)

• Included a screenshot or animation (if affecting the UI, see Licecap)

Changed the colors of the kernel error in the IPython console to enhance contrast. I used the new darker red proposed by @isabela-pf for errors in spyder-ide/ux-improvements#13.

Issue(s) Resolved

Fixes #13754

Affirmation

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I affirm the Developer Certificate of Origin
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and understand I am releasing the same under Spyder's MIT (Expat) license.

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Juanis2112

[ccordoba12]

Perhaps this red is too intense for the light theme?

@juanis2112, could you upload a new screenshot with the current red on the light theme?

[juanis2112]

Perhaps this red is too intense for the light theme?

@juanis2112, could you upload a new screenshot with the current red on the light theme?

Yeah maybe for the light mode the lighter red looks better

[ccordoba12]

Thanks @juanis2112, looks good to me now.

The base branch was changed.