chore: change hex colors to tailwind bariables

src/shared/ui/Section/SectionTitle/SectionTitle.svelte

@@ -13,7 +13,7 @@ interface Props {
 const { text }: Props = $props();
 </script>
 {#if text}
-    <h2 class="text-3xl md:text-4xl lg:text-5xl font-['Space_Grotesk'] font-bold text-[#1a1a1a] dark:text-[#e5e5e5] tracking-tight">
+    <h2 class="text-3xl md:text-4xl lg:text-5xl font-['Space_Grotesk'] font-bold text-swiss-black dark:text-neutral-200 tracking-tight">
         {text}
     </h2>
 {/if}