diff --git a/docs/usage.md b/docs/usage.md
index fce9ebe..d03f6db 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -164,7 +164,7 @@ This is achieved by having a pair of modules: -
     module handle_assembly() pose([225, 0, 150], [0, 0, 14]) //! Printed part with inserts in place
     assembly("handle") {
         translate_z(handle_height())
-            color(pp1_colour) vflip() handle_stl();
+            stl_colour(pp1_colour) vflip() handle_stl();
 
         handle_screw_positions()
             vflip()
diff --git a/tests/BOM.scad b/tests/BOM.scad
index 19568c3..99335be 100644
--- a/tests/BOM.scad
+++ b/tests/BOM.scad
@@ -67,7 +67,7 @@ module widgit_dxf() {
 //! * Push the insert into the base with a soldering iron heated to 200°C
 module widgit_base_assembly()
 assembly("widgit_base") {
-    color(pp1_colour)
+    stl_colour(pp1_colour)
         widgit_stl();
 
     translate_z(height)
diff --git a/tests/cable_grommets.scad b/tests/cable_grommets.scad
index 6c45d58..14dbe2c 100644
--- a/tests/cable_grommets.scad
+++ b/tests/cable_grommets.scad
@@ -22,14 +22,14 @@ use <../printed/cable_grommets.scad>
 
 module cable_grommets() {
     rotate(90)
-        color(pp1_colour) ribbon_grommet(20, 3);
+        stl_colour(pp1_colour) ribbon_grommet(20, 3);
 
     translate([20, 0])
         round_grommet_assembly(6, 3);
 
     translate([40, 0])
         rotate(90)
-            color(pp1_colour) mouse_grommet(5, 3);
+            stl_colour(pp1_colour) mouse_grommet(5, 3);
 }
 
 if($preview)
diff --git a/tests/carriers.scad b/tests/carriers.scad
index faed537..1cebf2b 100644
--- a/tests/carriers.scad
+++ b/tests/carriers.scad
@@ -20,15 +20,15 @@ include <../utils/core/core.scad>
 use <../printed/carriers.scad>
 
 module carriers() {
-    color(pp1_colour) ESP12F_carrier_stl();
+    stl_colour(pp1_colour) ESP12F_carrier_stl();
 
     translate([0, 15])
         rotate(90)
-            color(pp1_colour) TP4056_carrier_stl();
+            stl_colour(pp1_colour) TP4056_carrier_stl();
 
     translate([0, 25])
         rotate(90)
-            color(pp1_colour) MT3608_carrier_stl();
+            stl_colour(pp1_colour) MT3608_carrier_stl();
 }
 
 carriers();
diff --git a/tests/fan_guard.scad b/tests/fan_guard.scad
index d9bd342..e35c866 100644
--- a/tests/fan_guard.scad
+++ b/tests/fan_guard.scad
@@ -24,6 +24,6 @@ use <../utils/layout.scad>
 
 module fan_guards()
     layout([for(f = fans) fan_width(f)], 10)
-        color(pp1_colour) fan_guard(fans[$i], spokes = fan_width(fans[$i]) > 60 ? 8 : 4);
+        stl_colour(pp1_colour) fan_guard(fans[$i], spokes = fan_width(fans[$i]) > 60 ? 8 : 4);
 
 fan_guards();
diff --git a/tests/inserts.scad b/tests/inserts.scad
index f2fdc34..23eb39e 100644
--- a/tests/inserts.scad
+++ b/tests/inserts.scad
@@ -27,7 +27,7 @@ module inserts() {
         translate([10 * i, 0])
             insert(inserts[i]);
 
-    color(pp1_colour)
+    stl_colour(pp1_colour)
         translate([len(inserts) * 10, 0]) {
             insert_lug(inserts[0], 2, 1);
 
diff --git a/tests/light_strips.scad b/tests/light_strips.scad
index 58d4e3c..87a8b7c 100644
--- a/tests/light_strips.scad
+++ b/tests/light_strips.scad
@@ -29,7 +29,7 @@ module light_strips()
             for(end = [-1, 1])
                 translate([end * (light_strip_cut_length(light, segs) / 2 - d / 2), 0])
                     rotate([90, 0, 90])
-                        color(pp1_colour) render()
+                        stl_colour(pp1_colour) render()
                             translate_z(-d / 2)
                                 light_strip_clip(light);
         }
diff --git a/tests/polyholes.scad b/tests/polyholes.scad
index a0a7e11..19f66ac 100644
--- a/tests/polyholes.scad
+++ b/tests/polyholes.scad
@@ -34,7 +34,7 @@ module polyholes() {
                         children();
         }
 
-    color(pp1_colour) linear_extrude(3, center = true)
+    stl_colour(pp1_colour) linear_extrude(3, center = true)
         difference() {
             square([100, 27]);
 
@@ -52,7 +52,7 @@ module polyholes() {
     sizes = [1.5, 2, 3, 4];
     for(i = [0 : len(sizes) - 1])
         translate([i * 10, -10]) {
-            color(pp1_colour)
+            stl_colour(pp1_colour)
                 poly_tube(ir = ir, or = cir + sizes[i] * extrusion_width, h = 1);
 
             rod(2 * ir, 3);
diff --git a/tests/printed_box.scad b/tests/printed_box.scad
index a0f63d3..3434b78 100644
--- a/tests/printed_box.scad
+++ b/tests/printed_box.scad
@@ -93,7 +93,7 @@ module box1_base_stl()
 
 module box1_assembly()
 assembly("box1") {
-    color(pp1_colour) render() box1_case_stl();
+    stl_colour(pp1_colour) render() box1_case_stl();
 
     pbox_inserts(box1);
 
@@ -142,7 +142,7 @@ module box2_base_stl()
 
 module box2_assembly()
 assembly("box2") {
-    color(pp1_colour) render() box2_case_stl();
+    stl_colour(pp1_colour) render() box2_case_stl();
 
     pbox_inserts(box2);
 
diff --git a/tests/teardrops.scad b/tests/teardrops.scad
index ffe9d75..211aaf6 100644
--- a/tests/teardrops.scad
+++ b/tests/teardrops.scad
@@ -20,7 +20,7 @@
 include <../utils/core/core.scad>
 
 module teardrops() {
-    color(pp1_colour)
+    stl_colour(pp1_colour)
         rotate([90, 0, -45])
             difference() {
                 linear_extrude(3) {
diff --git a/tests/wire.scad b/tests/wire.scad
index da8dbdc..a499710 100644
--- a/tests/wire.scad
+++ b/tests/wire.scad
@@ -54,7 +54,7 @@ module wires() {
             %cylinder(r = bundle_r, h = wire_l - 10, center = true);
         }
 
-    color(pp1_colour) {
+    stl_colour(pp1_colour) {
         rotate([90, 0, 90])
             linear_extrude(thickness)
                 difference() {