Remove text_light_blue and use primary

resources/qml/WelcomePages/CloudContent.qml

@@ -56,7 +56,7 @@ Item
                 horizontalAlignment: Text.AlignHCenter
                 text: catalog.i18nc("@text", "The next generation 3D printing workflow")
                 textFormat: Text.RichText
-                color: UM.Theme.getColor("text_light_blue")
+                color: UM.Theme.getColor("primary")
                 font: UM.Theme.getFont("medium")
                 renderType: Text.NativeRendering
             }
@@ -112,7 +112,7 @@ Item
         shadowEnabled: false
         color: "transparent"
         hoverColor: "transparent"
-        textHoverColor: UM.Theme.getColor("text_light_blue")
+        textHoverColor: UM.Theme.getColor("primary")
         fixedWidthMode: true
         onClicked: Cura.API.account.login()
     }

resources/themes/cura-light/theme.json

@@ -193,8 +193,6 @@
 
         "window_disabled_background": [0, 0, 0, 255],
 
-        "text_light_blue": [50, 130, 255, 255],
-
         "text": [25, 25, 25, 255],
         "text_detail": [174, 174, 174, 128],
         "text_link": [50, 130, 255, 255],