script: refactor change-colortheme

.utils/apply-color-parse-arg

@@ -0,0 +1,32 @@
+# snippet to parse args in apply-color scripts
+
+[ -z "$1" ] && exit 1
+palette="$1"
+[ -z "$2" ] && exit 1
+colorName="$2"
+[ -z "$3" ] && exit 1
+colorHex="$3"
+
+function log_error {
+    printf "\033[0;31mError:\033[0m $1\n" >&2
+}
+
+function log_info {
+    printf "\033[0;32mInfo:\033[0m $1\n" >&2
+}
+
+
+# remove leading '#' if present
+if [[ $colorHex == \#* ]]; then
+    colorHex="${colorHex#\#}"
+fi
+
+# check if hex
+if ! [[ $colorHex =~ ^[0-9A-Fa-f]{6}$ ]]; then
+    log_error "Invalid color hex: $colorHex"
+    exit 1
+fi
+
+function log_success {
+    log_info "Applied primary color ${colorName} (${colorHex}) to \033[1;34m$1\033[0m"
+}