diff --git a/src/substrate.gleam b/src/substrate.gleam
index 61fd1ab..fd577d2 100644
--- a/src/substrate.gleam
+++ b/src/substrate.gleam
@@ -2,6 +2,7 @@ import gleam/float
 import gleam/list
 import gleam/option.{None, Some}
 import gleam/order
+import gleam/string
 import kicad_sexpr
 import kicad_sexpr/token.{type Footprint, type Pad}
 import lustre/attribute.{style} as _attribute
@@ -189,8 +190,8 @@ fn create_svg(footprint: Footprint) -> String {
       transform:,
       children: footprint.pads
         |> list.filter(fn(pad) {
-          pad.layers |> list.contains(token.Layer("F.Cu"))
-          || pad.layers |> list.contains(token.Layer("*.Cu"))
+          pad.layers
+          |> list.any(fn(layer) { layer.layer |> string.ends_with(".Cu") })
         })
         |> list.map(pad_to_element),
     ),
@@ -561,9 +562,11 @@ fn pad_to_element(pad: Pad) -> Element(a) {
           )
       }
   }
-  let fill = Some(bg_col)
-  let stroke = Some("#E7B629")
-  let stroke_width = Some(0.03333)
+  let #(fill, stroke, stroke_width) = case pad.type_ {
+    token.ThroughHolePadType -> #(Some(bg_col), Some("#E7B629"), Some(0.03333))
+    token.NpThroughHolePadType -> #(Some("#18C7D6"), None, None)
+    _ -> #(None, None, None)
+  }
   case pad.drill {
     Some(token.PadDrillDefinition(False, Some(d), ..))
     | Some(token.PadDrillDefinition(True, Some(d), None, ..)) ->