diff --git a/tools/gen-auth b/tools/gen-auth
index ea4ada0..2d27c70 100644
--- a/tools/gen-auth
+++ b/tools/gen-auth
@@ -3,19 +3,19 @@
 
 set -e
 
-GREEN='\033[0;32m'
-BLUE='\033[0;34m'
-YELLOW='\033[1;33m'
-CYAN='\033[0;36m'
-BOLD='\033[1m'
-NC='\033[0m'
+GREEN=$(printf '\033[0;32m')
+BLUE=$(printf '\033[0;34m')
+YELLOW=$(printf '\033[1;33m')
+CYAN=$(printf '\033[0;36m')
+BOLD=$(printf '\033[1m')
+NC=$(printf '\033[0m')
 
 PASS=$(head -c 24 /dev/urandom | base64 | tr -d '\n')
 HASH=$(tor --hash-password "$PASS")
 
 echo ""
 echo "${CYAN}╔════════════════════════════════════════════════════════════╗${NC}"
-echo "${CYAN}║${NC}  ${BOLD}Tor Control Port Authentication Generator${NC}              ${CYAN}║${NC}"
+echo "${CYAN}║${NC}  ${BOLD}Tor Control Port Authentication Generator${NC}                 ${CYAN}║${NC}"
 echo "${CYAN}╚════════════════════════════════════════════════════════════╝${NC}"
 echo ""
 echo "${GREEN}✓${NC} Generated secure 32-character password"