diff --git a/src/views/Admin/SettingsView.vue b/src/views/Admin/SettingsView.vue
index 64f279afc..c40309667 100644
--- a/src/views/Admin/SettingsView.vue
+++ b/src/views/Admin/SettingsView.vue
@@ -102,6 +102,7 @@
             :maxSize="maxSize"
           />
         </label>
+        <!-- piece of code to manage instance colors
         <div class="field flex flex-col">
           <label class="" for="primary-color">{{ t("Primary Color") }}</label>
           <o-input
@@ -120,6 +121,7 @@
             id="secondary-color"
           />
         </div>
+        -->
         <o-field :label="t('Allow registrations')">
           <o-switch v-model="settingsToWrite.registrationsOpen">
             <p
diff --git a/tailwind.config.cjs b/tailwind.config.cjs
index b040f408f..76075c33f 100644
--- a/tailwind.config.cjs
+++ b/tailwind.config.cjs
@@ -11,30 +11,30 @@ module.exports = {
         "frama-violet": "#725794",
         "frama-orange": "#cc4e13",
         "mbz-yellow": {
-          DEFAULT: "#FFD599",
-          50: "#FFFFFF",
-          100: "#FFFFFF",
-          200: "#FFFFFF",
-          300: "#FFF7EB",
-          400: "#FFE6C2",
-          500: "#FFD599",
-          600: "#FFBE61",
-          700: "#FFA729",
-          800: "#F08D00",
-          900: "#B86C00",
+          DEFAULT: "#f2f2f2",
+          50:  "#d9d9d9",
+          100: "#e5e5e5",
+          200: "#f2f2f2",
+          300: "#ffffff",
+          400: "#cccccc",
+          500: "#bfbfbf",
+          600: "#b3b3b3",
+          700: "#a6a6a6",
+          800: "#999999",
+          900: "#8c8c8c",
         },
         "mbz-yellow-alt": {
-          DEFAULT: "#FAB12D",
-          50: "#FEF4E0",
-          100: "#FEECCC",
-          200: "#FDDDA5",
-          300: "#FCCF7D",
-          400: "#FBC055",
-          500: "#FAB12D",
-          600: "#E99806",
-          700: "#B37404",
-          800: "#7C5103",
-          900: "#452D02",
+          DEFAULT: "#f2f2f2",
+          50:  "#d9d9d9",
+          100: "#e5e5e5",
+          200: "#f2f2f2",
+          300: "#ffffff",
+          400: "#cccccc",
+          500: "#bfbfbf",
+          600: "#b3b3b3",
+          700: "#a6a6a6",
+          800: "#999999",
+          900: "#8c8c8c",
         },
         "mbz-purple": {
           DEFAULT: "#424056",