Fix line color

packages/tldraw/src/components/Primitives/icons/LineIcon.tsx

 
 export function LineIcon() {
   return (
-    <svg width="15" height="15" viewBox="0 0 15 15" fill="black" xmlns="http://www.w3.org/2000/svg">
+    <svg
+      width="15"
+      height="15"
+      viewBox="0 0 15 15"
+      fill="currentColor"
+      xmlns="http://www.w3.org/2000/svg"
+    >
       <path d="M3.64645 11.3536C3.45118 11.1583 3.45118 10.8417 3.64645 10.6465L11.1464 3.14645C11.3417 2.95118 11.6583 2.95118 11.8536 3.14645C12.0488 3.34171 12.0488 3.65829 11.8536 3.85355L4.35355 11.3536C4.15829 11.5488 3.84171 11.5488 3.64645 11.3536Z" />
     </svg>
   )