[UI] Ray icon is not readable on dark theme (bad color)

[danielgafni]

What's the issue?

I think we should display the blue icon, not the grey, colorless one.

How it looks now:

How it could look:

(note that this seems to be the new updated logo)

What did you expect to happen?

No response

How to reproduce?

No response

Dagster version

cloud

Deployment type

Dagster Cloud

Deployment details

No response

Additional information

cc @cmpadden

Message from the maintainers

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[cmpadden]

@danielgafni would you be able to confirm that this works as you'd expect?

#28759