Cleanup of hardcoded colors strings #5200

Job	Run time
build-and-check	2m 46s
test-integration-packages/internal	43s
test-integration-packages/billing	41s
test-integration-common	39s
test-integration-packages/agent-runtime	43s
test-integration-sdk	1m 0s
test-integration-cli	51s
test-.agents	40s
test-integration-web	43s
test-web	47s
test-sdk	56s
test-integration-.agents	1m 10s
test-packages/agent-runtime	54s
test-packages/internal	42s
test-packages/billing	39s
test-common	43s
test-cli	1m 9s
	15m 46s

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