3D viewer EM shader: phosphor-green illumination instead of white

scripts/3d_model_viewer.js

@@ -273,7 +273,7 @@
                 if (RENDER_MODE === "em") {
                     return new THREE.ShaderMaterial({
                         uniforms: {
-                            uColor: { value: new THREE.Color(0xd6d6d6) },
+                            uColor: { value: new THREE.Color(0x66ff88) },
                             uLightDir: { value: new THREE.Vector3(0.6, 0.9, 0.4).normalize() }
                         },
                         vertexShader: EM_VERT,