Grayscale improves focus?

modules/user/hyprland/default.nix

@@ -516,6 +516,7 @@ in
       qt6.qtwayland
       xdg-utils
       wlsunset
+      hyprshade
       pavucontrol
       (pkgs.writeScriptBin "workspace-on-monitor" ''
       #!/bin/sh
@@ -547,6 +548,10 @@ in
           killall wlsunset &> /dev/null;
         fi
       '')
+      (pkgs.writeScriptBin "scg" ''
+        #!/bin/sh
+        hyprshade toggle grayscale;
+      '')
       (pkgs.writeScriptBin "obs-notification-mute-daemon" ''
         #!/bin/sh
         while true; do
@@ -565,6 +570,61 @@ in
         then echo "Shouldn't suspend"; sleep 10; else echo "Should suspend"; systemctl suspend; fi
       '')
     ]);
+    home.file.".config/hypr/shaders/grayscale.glsl".text = ''
+      /*
+       * Grayscale
+       */
+      
+      precision highp float;
+      varying vec2 v_texcoord;
+      uniform sampler2D tex;
+      
+      // Enum for type of grayscale conversion
+      const int LUMINOSITY = 0;
+      const int LIGHTNESS = 1;
+      const int AVERAGE = 2;
+      
+      /**
+       * Type of grayscale conversion.
+       */
+      const int Type = LUMINOSITY;
+      
+      // Enum for selecting luma coefficients
+      const int PAL = 0;
+      const int HDTV = 1;
+      const int HDR = 2;
+      
+      /**
+       * Formula used to calculate relative luminance.
+       * (Only applies to type = "luminosity".)
+       */
+      const int LuminosityType = HDR;
+      
+      void main() {
+          vec4 pixColor = texture2D(tex, v_texcoord);
+      
+          float gray;
+          if (Type == LUMINOSITY) {
+              // https://en.wikipedia.org/wiki/Grayscale#Luma_coding_in_video_systems
+              if (LuminosityType == PAL) {
+                  gray = dot(pixColor.rgb, vec3(0.299, 0.587, 0.114));
+              } else if (LuminosityType == HDTV) {
+                  gray = dot(pixColor.rgb, vec3(0.2126, 0.7152, 0.0722));
+              } else if (LuminosityType == HDR) {
+                  gray = dot(pixColor.rgb, vec3(0.2627, 0.6780, 0.0593));
+              }
+          } else if (Type == LIGHTNESS) {
+              float maxPixColor = max(pixColor.r, max(pixColor.g, pixColor.b));
+              float minPixColor = min(pixColor.r, min(pixColor.g, pixColor.b));
+              gray = (maxPixColor + minPixColor) / 2.0;
+          } else if (Type == AVERAGE) {
+              gray = (pixColor.r + pixColor.g + pixColor.b) / 3.0;
+          }
+          vec3 grayscale = vec3(gray);
+      
+          gl_FragColor = vec4(grayscale, pixColor.a);
+      }
+    '';
     home.file.".config/ashell/config.toml".text = ''
 outputs = "All"
 position = "Top"