diff --git a/style.go b/style.go
deleted file mode 100644
index 0539f7b..0000000
--- a/style.go
+++ /dev/null
@@ -1,47 +0,0 @@
-package tomo
-
-import "fmt"
-
-// Role describes the role of an object.
-type Role struct {
-	// Package is an optional namespace field. If specified, it should be
-	// the package name or module name the object is from.
-	Package string
-
-	// Object specifies what type of object it is. For example:
-	//   - TextInput
-	//   - Table
-	//   - Label
-	//   - Dial
-	// This should correspond directly to the type name of the object.
-	Object string
-}
-
-// String satisfies the fmt.Stringer interface. It follows the format of:
-//   Package.Object
-func (r Role) String () string {
-	return fmt.Sprintf("%s.%s", r.Package, r.Object)
-}
-
-// R is shorthand for creating a role structure.
-func R (pack, object string) Role {
-	return Role { Package: pack, Object: object }
-}
-
-// Color represents a color ID.
-type Color int; const (
-	ColorBackground Color = iota
-	ColorForeground
-	ColorRaised
-	ColorSunken
-	ColorAccent
-)
-
-// RGBA satisfies the color.Color interface. The result of this method may be
-// rendered invalid if the visual style changes, so it is often necessary to
-// subscribe to the StyleChange event in order to get new RGBA values when this
-// happens.
-func (id Color) RGBA () (r, g, b, a uint32) {
-	assertBackend()
-	return backend.ColorRGBA(id)
-}
diff --git a/unit.go b/unit.go
index cd14bea..abb6e9c 100644
--- a/unit.go
+++ b/unit.go
@@ -1,5 +1,6 @@
 package tomo
 
+import "fmt"
 import "image"
 import "image/color"
 
@@ -123,3 +124,47 @@ type Face struct {
         // altering their design.
         Slant float64
 }
+
+// Role describes the role of an object.
+type Role struct {
+	// Package is an optional namespace field. If specified, it should be
+	// the package name or module name the object is from.
+	Package string
+
+	// Object specifies what type of object it is. For example:
+	//   - TextInput
+	//   - Table
+	//   - Label
+	//   - Dial
+	// This should correspond directly to the type name of the object.
+	Object string
+}
+
+// String satisfies the fmt.Stringer interface. It follows the format of:
+//   Package.Object
+func (r Role) String () string {
+	return fmt.Sprintf("%s.%s", r.Package, r.Object)
+}
+
+// R is shorthand for creating a role structure.
+func R (pack, object string) Role {
+	return Role { Package: pack, Object: object }
+}
+
+// Color represents a color ID.
+type Color int; const (
+	ColorBackground Color = iota
+	ColorForeground
+	ColorRaised
+	ColorSunken
+	ColorAccent
+)
+
+// RGBA satisfies the color.Color interface. The result of this method may be
+// rendered invalid if the visual style changes, so it is often necessary to
+// subscribe to the StyleChange event in order to get new RGBA values when this
+// happens.
+func (id Color) RGBA () (r, g, b, a uint32) {
+	assertBackend()
+	return backend.ColorRGBA(id)
+}