diff --git a/tests/colors.sh b/tests/colors.sh
new file mode 100755
index 00000000..c48673e3
--- /dev/null
+++ b/tests/colors.sh
@@ -0,0 +1,104 @@
+#!/bin/sh
+
+# cursor to 0,0
+printf '\033[H'
+printf '\033[0m(256) System colors: background\n'
+for COLOR in $(seq 0 7); do
+   printf '\033[48;5;%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+for COLOR in $(seq 8 15); do
+   printf '\033[48;5;%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+
+printf '\033[0m System colors: background\n'
+for COLOR in $(seq 40 47); do
+   printf '\033[%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+for COLOR in $(seq 100 107); do
+   printf '\033[%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+
+
+printf '\033[0m System colors: foreground\n'
+for COLOR in $(seq 30 37); do
+   printf '\033[0;%sm██' "${COLOR}"
+done
+printf '\033[0m\n';
+for COLOR in $(seq 90 97); do
+   printf '\033[0;%sm██' "${COLOR}"
+done
+printf '\033[0m\n';
+
+printf '\n\n\n\nColor cube, 6x6x6:\n';
+for GREEN in $(seq 0 5); do
+   for RED in $(seq 0 5); do
+      for BLUE in $(seq 0 5); do
+         COLOR=$((16 + (RED * 36) + (GREEN * 6) + BLUE))
+         printf '\033[48;5;%sm  ' "${COLOR}"
+      done
+      printf '\033[0m '
+   done
+   printf '\n'
+done
+
+#printf '\033[0m\n';
+printf 'Grayscale ramp:\n';
+for COLOR in $(seq 232 255); do
+    printf '\033[48;5;%sm  ' "${COLOR}"
+done
+printf '\x1b[0m\n';
+
+# restrict cursor
+printf '\033[?6h'
+# allow left/right margins
+printf '\033[?69h'
+# set left/right margins:
+printf '\033[40s'
+
+
+printf '\033[0m Bright colors: background\n'
+for COLOR in $(seq 40 47); do
+   printf '\033[1;%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+for COLOR in $(seq 100 107); do
+   printf '\033[1;%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+
+
+printf '\033[0m Bright colors: foreground\n'
+for COLOR in $(seq 30 37); do
+   printf '\033[1;%sm██' "${COLOR}"
+done
+printf '\033[0m\n';
+for COLOR in $(seq 90 97); do
+   printf '\033[1;%sm██' "${COLOR}"
+done
+printf '\033[0m\n';
+
+
+printf '\033[0m Dim/Faint colors: background\n'
+for COLOR in $(seq 40 47); do
+   printf '\033[2;%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+for COLOR in $(seq 100 107); do
+   printf '\033[2;%sm  ' "${COLOR}"
+done
+printf '\033[0m\n';
+
+
+printf '\033[0m Dim/Faint colors: foreground\n'
+for COLOR in $(seq 30 37); do
+   printf '\033[2;%sm██' "${COLOR}"
+done
+printf '\033[0m\n';
+for COLOR in $(seq 90 97); do
+   printf '\033[2;%sm██' "${COLOR}"
+done
+printf '\033[0m\n';
diff --git a/tests/tests.results b/tests/tests.results
index ae066776..ea5bddcc 100644
--- a/tests/tests.results
+++ b/tests/tests.results
@@ -25,3 +25,4 @@ dsr-deccksr.sh 6c3483e8e47a110a7b97eaffd9c5ff83
 dsr-os.sh 1645f13652d7ee51d66dc93000247280
 dsr-pp.sh 0f0a7d5beccefbad4f4984fc4611276e
 dsr-udk.sh f3a20968a2f25bfd36875dbc5f64ab16
+colors.sh 532494a2e56c102ee10ab1a9b8f176d7