Add color-coding to kubemark scripts.

test/kubemark/skeleton/util.sh

@@ -74,3 +74,20 @@ function copy-files() {
 function delete-master-instance-and-resources {
 	echo "Deleting master instance and its allocated resources" 1>&2
 }
+
+# Common colors used throughout the kubemark scripts
+if [[ -z "${color_start-}" ]]; then
+  declare -r color_start="\033["
+  # shellcheck disable=SC2034
+  declare -r color_red="${color_start}0;31m"
+  # shellcheck disable=SC2034
+  declare -r color_yellow="${color_start}0;33m"
+  # shellcheck disable=SC2034
+  declare -r color_green="${color_start}0;32m"
+  # shellcheck disable=SC2034
+  declare -r color_blue="${color_start}1;34m"
+  # shellcheck disable=SC2034
+  declare -r color_cyan="${color_start}1;36m"
+  # shellcheck disable=SC2034
+  declare -r color_norm="${color_start}0m"
+fi
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