chore: vibe coding page visual updates (#631)

Author: vele616

apps/website/src/assets/pic_phase_3.png

@@ -1,7 +1,7 @@
 ---
 image: "/src/assets/pic_phase_1.png"
 imageAlt: "Illustration of crocodile presenting analytics on a board"
-imageBgColor: "bg-[#A3A7B4]"
+imageBgColor: "bg-[#3D4EDE]"
 pill: "We finish your vibe-coded mvps"
 title: "You've built this far..."
 checks:

apps/website/src/content/vibe_code_mvp_phases/phase_1.md

@@ -1,7 +1,7 @@
 ---
 image: "/src/assets/pic_phase_3.png"
 imageAlt: "Illustration of crocodile and developers collaborating"
-imageBgColor: "bg-[#C97771]"
+imageBgColor: "bg-[#FB5D2A]"
 pill: "We finish your vibe-coded mvps"
 title: "We'll help you finish it!"
 checks: ["Solid logic", "Real backend", "Stable deployment", "Ready to launch"]