${ "cafebabe" hex>rgba } [ COLOR: #cafebabe value>> ] unit-test
${ "112233" hex>rgba } [ COLOR: #112233 value>> ] unit-test
${ "11223344" hex>rgba } [ COLOR: #11223344 value>> ] unit-test
+
+{ "#00000000" } [ transparent color>hex ] unit-test
+{ "#cafebabe" } [ COLOR: #cafebabe color>hex ] unit-test
+{ "#112233" } [ COLOR: #112233 color>hex ] unit-test
+{ "#11223344" } [ COLOR: #11223344 color>hex ] unit-test