diff --git a/client/web/.eslintrc.js b/client/web/.eslintrc.js
index c7edac88..f09f8675 100644
--- a/client/web/.eslintrc.js
+++ b/client/web/.eslintrc.js
@@ -19,5 +19,6 @@ module.exports = {
 		"linebreak-style": ["error", "unix"],
 		indent: ["error", "tab"],
 		quotes: ["error", "double"],
+		camelcase: ["error", { ignoreImports: true, ignoreDestructuring: true }]
 	},
 };
diff --git a/client/web/wasm/src/lib.rs b/client/web/wasm/src/lib.rs
index 4204ebb0..dcdbcbc4 100644
--- a/client/web/wasm/src/lib.rs
+++ b/client/web/wasm/src/lib.rs
@@ -1,3 +1,4 @@
+mod shims;
 pub mod utils;
 pub mod viewport;
 pub mod window;
diff --git a/client/web/wasm/src/shims.rs b/client/web/wasm/src/shims.rs
new file mode 100644
index 00000000..54cdbf50
--- /dev/null
+++ b/client/web/wasm/src/shims.rs
@@ -0,0 +1,10 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+extern "C" {
+	#[derive(Clone, Debug)]
+	pub type Error;
+
+	#[wasm_bindgen(constructor)]
+	pub fn new(msg: &str) -> Error;
+}
diff --git a/client/web/wasm/src/viewport.rs b/client/web/wasm/src/viewport.rs
index 2eaabbb9..67a92f73 100644
--- a/client/web/wasm/src/viewport.rs
+++ b/client/web/wasm/src/viewport.rs
@@ -1,3 +1,4 @@
+use crate::shims::Error;
 use crate::wrappers::{translate_tool, Color};
 use graphite_editor_core::tools::ToolState;
 use wasm_bindgen::prelude::*;
@@ -8,10 +9,10 @@ pub static mut TOOL_STATE: ToolState = ToolState::default();
 #[wasm_bindgen]
 pub fn select_tool(tool: String) -> Result<(), JsValue> {
 	let tool_state = unsafe { &mut TOOL_STATE };
-	if let Some(tool) = translate_tool(tool.as_str()) {
+	if let Some(tool) = translate_tool(&tool) {
 		Ok(tool_state.select_tool(tool))
 	} else {
-		Err(JsValue::from(format!("Couldn't select {} because it was not recognized as a valid tool", tool)))
+		Err(Error::new(&format!("Couldn't select {} because it was not recognized as a valid tool", tool)).into())
 	}
 }
 
@@ -25,6 +26,6 @@ pub fn on_mouse_move(x: u32, y: u32) {
 #[wasm_bindgen]
 pub fn update_colors(primary_color: Color, secondary_color: Color) {
 	let tool_state = unsafe { &mut TOOL_STATE };
-	tool_state.set_primary_color(primary_color.get_inner_color());
-	tool_state.set_secondary_color(secondary_color.get_inner_color());
+	tool_state.set_primary_color(primary_color.inner());
+	tool_state.set_secondary_color(secondary_color.inner());
 }
diff --git a/client/web/wasm/src/wrappers.rs b/client/web/wasm/src/wrappers.rs
index 49af141b..976fbca1 100644
--- a/client/web/wasm/src/wrappers.rs
+++ b/client/web/wasm/src/wrappers.rs
@@ -1,3 +1,4 @@
+use crate::shims::Error;
 use graphite_editor_core::tools::{SelectAppendMode, ToolType};
 use graphite_editor_core::Color as InnerColor;
 use wasm_bindgen::prelude::*;
@@ -8,13 +9,16 @@ pub struct Color(InnerColor);
 #[wasm_bindgen]
 impl Color {
 	#[wasm_bindgen(constructor)]
-	pub fn new(red: f32, green: f32, blue: f32, alpha: f32) -> Self {
-		Self(InnerColor::from_rgbaf32(red, green, blue, alpha).unwrap_throw())
+	pub fn new(red: f32, green: f32, blue: f32, alpha: f32) -> Result<Color, JsValue> {
+		match InnerColor::from_rgbaf32(red, green, blue, alpha) {
+			Ok(v) => Ok(Self(v)),
+			Err(e) => Err(Error::new(&e.to_string()).into()),
+		}
 	}
 }
 
 impl Color {
-	pub fn get_inner_color(&self) -> InnerColor {
+	pub fn inner(&self) -> InnerColor {
 		self.0
 	}
 }
diff --git a/core/editor/src/color.rs b/core/editor/src/color.rs
index 70d35158..76f24db8 100644
--- a/core/editor/src/color.rs
+++ b/core/editor/src/color.rs
@@ -23,6 +23,7 @@ impl Color {
 		}
 		Ok(color)
 	}
+
 	const fn from_unsafe(red: f32, green: f32, blue: f32) -> Color {
 		Color { red, green, blue, alpha: 1. }
 	}