feat: rm unused color

Signed-off-by: QuentinN42 <quentin@lieumont.fr>

builder/templates/main.css

@@ -26,7 +26,7 @@ h2 {
   text-decoration: none;
   border-radius: 6px;
   border: 2px solid rgb({{category.txtrgb[0]}}, {{category.txtrgb[1]}}, {{category.txtrgb[2]}});
-  background: rgb({{category.bgrgba[0]}}, {{category.bgrgba[1]}}, {{category.bgrgba[2]}}, {{category.bgrgba[3]}});
+  background: rgb(256, 256, 256, 0.9);
   overflow: hidden;
   padding: 10%;
 }
@@ -42,7 +42,7 @@ h2 {
 }
 
 .item-{{category.id}} .desc {
-  background: rgba({{category.bgrgba[0]}}, {{category.bgrgba[1]}}, {{category.bgrgba[2]}}, {{category.bgrgba[3]}});
+  background: rgba(256, 256, 256, 0.9);
   width: 100%;
   height: 100%;
   transition-property: transform;

config.json

@@ -5,7 +5,6 @@
     {
       "id": "telecom",
       "name": "Télécom Paris",
-      "bgrgba": [256, 256, 256, 0.9],
       "txtrgb": [220, 75, 75],
       "content": [
         {
@@ -61,7 +60,6 @@
     {
       "id": "rezel",
       "name": "Rezel",
-      "bgrgba": [256, 256, 256, 0.9],
       "txtrgb": [0, 150, 250],
       "content": [
         {
@@ -153,7 +151,6 @@
     {
       "id": "oss",
       "name": "Open Source Softwares",
-      "bgrgba": [256, 256, 256, 0.9],
       "txtrgb": [61, 166, 57],
       "content": [
         {