diff --git a/build.subr b/build.subr
index c7f05bb..b497c1c 100644
--- a/build.subr
+++ b/build.subr
@@ -1,5 +1,5 @@
 #
-# set -o errexit is assumed.
+# . ./build.vars and set -o errexit are assumed.
 #
 
 TIMESTAMP_FMT="${TIMESTAMP_FMT:-"%Y/%m/%d %H:%M:%S"}";
@@ -66,9 +66,9 @@ set_build_script_done() {
 log_msg() {
 	_lvl=${1}; shift;
 	case ${_lvl} in
-		fail) printf "\033[91m"; ;;
-		info) printf "\033[97m"; ;;
-		succ) printf "\033[92m"; ;;
+		fail) printf "\033[${LOG_MSG_FAIL_COLOUR}m"; ;;
+		info) printf "\033[${LOG_MSG_INFO_COLOUR}m"; ;;
+		succ) printf "\033[${LOG_MSG_SUCC_COLOUR}m"; ;;
 	esac;
 	if [ $# -gt 1 ]; then
 		printf "==> %s %s %s\033[0m\n" "$(date +"${TIMESTAMP_FMT}")" "${1}" "$*";
diff --git a/build.vars b/build.vars
index 85f0012..5f48797 100644
--- a/build.vars
+++ b/build.vars
@@ -8,6 +8,9 @@
 : ${CFLAGS_PACKAGES:=-g3 -O0};
 : ${GITROOT:=git://midipix.org};
 : ${HOST_NATIVE:=x86_64-nt64-midipix};
+: ${LOG_MSG_FAIL_COLOUR:=91};
+: ${LOG_MSG_INFO_COLOUR:=93};
+: ${LOG_MSG_SUCC_COLOUR:=92};
 : ${PREFIX:=${HOME}/midipix};
 : ${PREFIX_NATIVE:=${PREFIX}/native};
 : ${TARGET:=x86_64-nt64-midipix};