diff --git a/ansi-colors.sh b/ansi-colors.sh
index fce0a906dfddf78af141c9a143a0e1bf2b376e5d..2de4e1e239be205722613a19dd5815466303c291 100644
--- a/ansi-colors.sh
+++ b/ansi-colors.sh
@@ -2,12 +2,15 @@
 
 DARKGRAY='0;30'
 RED='0;31'
-LIGHTRED='1;31'
+BOLDRED='1;31'
 GREEN='0;32'
-YELLOW='1;33'
+BOLDGREEN='1;32'
+YELLOW='0;33'
+BOLDYELLOW='1;33'
 BLUE='0;34'
+BOLDBLUE='1;34'
 PURPLE='0;35'
-LIGHTPURPLE='1;35'
+BOLDPURPLE='1;35'
 CYAN='0;36'
 WHITE='1;37'
 
diff --git a/buildjob b/buildjob
index 3fbf96eba033076ce394288ee97b5b9ab89d1042..acc68685b6dd968c328cc1de708462cd533313d3 100755
--- a/buildjob
+++ b/buildjob
@@ -18,15 +18,15 @@ set -e
 env | egrep '^(CI_BUILD_REF|CI_RUNNER)' > build-env.txt
 
 # Build
-echo_color "$GREEN" "[buildjob] Perfoming build"
+echo_color "$BOLDGREEN" "[buildjob] Perfoming build"
 time make -k -j$CPU_CORES TIMED=y 2>&1 | tee build-log.txt
 if fgrep Axiom build-log.txt >/dev/null; then exit 1; fi
-echo_color "$GREEN" "[buildjob] Build time summary"
+echo_color "$BOLDGREEN" "[buildjob] Build time summary"
 cat build-log.txt | egrep "[a-zA-Z0-9_/-]+ \((real|user): [0-9]" | tee build-time.txt
 
 # maybe validate
 if [[ -n "$VALIDATE" ]]; then
-    echo_color "$GREEN" "[buildjob] Performing validation"
+    echo_color "$BOLDGREEN" "[buildjob] Performing validation"
     make validate;
 fi
 
@@ -35,7 +35,7 @@ if [[ -z "$OPAM_PKG_BRANCH" ]]; then
     OPAM_PKG_BRANCH=master
 fi
 if [[ -n "$OPAM_PKG" && "$CI_COMMIT_REF_NAME" == "$OPAM_PKG_BRANCH" ]]; then
-    echo_color "$GREEN" "[buildjob] Releasing package on opam"
+    echo_color "$BOLDGREEN" "[buildjob] Releasing package on opam"
     # determine package name prefix
     if [[ "$CI_COMMIT_REF_NAME" == master ]]; then
         OPAM_PKG_PREFIX=dev
diff --git a/prepare-opam.sh b/prepare-opam.sh
index c7ad6e049d011ccc0132851aa0246d6db11af2ca..8c257f203d9e6c1a55cba9caa6606dd7a8f55d64 100644
--- a/prepare-opam.sh
+++ b/prepare-opam.sh
@@ -7,9 +7,9 @@ export OPAM_EDITOR="$(which false)"
 
 # Make sure we got a good OPAM.
 if test -d "$OPAMROOT"; then
-    echo_color "$GREEN" "[prepare-opam] Re-using cached opam root"
+    echo_color "$BOLDGREEN" "[prepare-opam] Re-using cached opam root"
 else
-    echo_color "$YELLOW" "[prepare-opam] Creating new opam root"
+    echo_color "$BOLDYELLOW" "[prepare-opam] Creating new opam root"
     mkdir "$OPAMROOT"
     opam init --no-setup -y
 fi
@@ -39,7 +39,7 @@ echo
 # that is not currently possible.
 
 # Install fixed versions of some dependencies.
-echo_color "$GREEN" "[prepare-opam] Processing pins"
+echo_color "$BOLDGREEN" "[prepare-opam] Processing pins"
 while (( "$#" )); do # while there are arguments left
     PACKAGE="$1" ; shift
     KIND="$1" ; shift
@@ -48,21 +48,21 @@ while (( "$#" )); do # while there are arguments left
     # Check if the pin is already set
     read -a PIN <<< $(opam pin list | (egrep "^$PACKAGE[. ]"))
     if [[ "${PIN[1]}" == "$KIND" && "${PIN[2]}" == "$VERSION" ]]; then
-        echo_color "$GREEN" "[prepare-opam] $PACKAGE already $KIND-pinned to $VERSION"
+        echo_color "$BOLDGREEN" "[prepare-opam] $PACKAGE already $KIND-pinned to $VERSION"
     else
-        echo_color "$YELLOW" "[prepare-opam] $KIND-pinning $PACKAGE to $VERSION"
+        echo_color "$BOLDYELLOW" "[prepare-opam] $KIND-pinning $PACKAGE to $VERSION"
         opam pin add -y -k "$KIND" "$PACKAGE" "$VERSION"
     fi
 done
 echo
 
 # Upgrade cached things.
-echo_color "$GREEN" "[prepare-opam] Upgrading opam"
+echo_color "$BOLDGREEN" "[prepare-opam] Upgrading opam"
 opam upgrade -y --fixup && opam upgrade -y
 echo
 
 # Install build-dependencies.
-echo_color "$GREEN" "[prepare-opam] Installing build-dependencies"
+echo_color "$BOLDGREEN" "[prepare-opam] Installing build-dependencies"
 make build-dep OPAMFLAGS=-y
 echo