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Project Rationale: 404 Error Page for "Basics"

Platform Overview

Basics is a personal finance application designed specifically for people with little to no financial knowledge.

Design Philosophy

When users encounter an error on a financial platform, their immediate concern is often "Is my money safe?" This 404 page addresses that anxiety head-on while maintaining the brand's friendly, educational voice.

Visual Design Decisions

Graph Flatline Concept

I chose a data visualization metaphor for the 404 illustration rather than generic imagery like piggy banks or coins. The wavy line that flatlines at "404" accomplishes several goals:

  • Reinforces platform identity: Basics is about tracking and understanding your financial data. Using a graph as the error state visual reinforces that this is a data-driven platform.
  • Sophistication without intimidation: The clean, minimal graph feels professional but not corporate, striking the balance our audience needs.
  • Unique approach: Most 404 pages use literal objects or mascots. A data visualization metaphor stands out while staying on-brand.

Dark Theme

The dark background [#1a1f2e] was an intentional choice:

  • Reduces visual noise: Dark interfaces minimize distractions, helping anxious users focus on the essential information.
  • Modern and trustworthy: Dark themes convey sophistication and security, building confidence in the platform.
  • Eye comfort: For users spending extended time budgeting or reviewing finances, dark mode reduces eye strain.

Color Palette

The teal accent color [#00D9A3] serves multiple purposes:

  • High contrast: Against the dark background, teal ensures critical elements (the reassurance message, primary button) are immediately visible.
  • Emotional association: Teal/green conveys growth, safety, and positivity - important psychological cues for financial beginners.
  • Brand consistency: The color is pulled directly from the Basics logo, maintaining visual coherence.

Content & Clarity

Headline: "We lost this page 🤦"

Rather than technical language like "404 Error" or "Page Not Found," I used conversational phrasing that:

  • Takes ownership of the mistake ("We lost") rather than blaming the user
  • Uses an emoji to add humanity and reduce tension
  • Feels like a friend admitting an error, not a system failure

Immediate Reassurance: "But your money? Safe and sound."

This line is critical. Positioned prominently in the brand's teal color, it:

  • Addresses the primary user concern before they even ask
  • Uses conversational language ("But your money?" mirrors how people actually think and speak)
  • Provides instant relief through color coding and placement

Body Copy: "The page you're looking for doesn't exist (we know, it's annoying). But here's what you can do:"

This explanation:

  • Validates user frustration with parenthetical empathy
  • Uses plain language accessible to anyone, regardless of technical literacy
  • Transitions to solutions rather than dwelling on the problem

Scannability & Information Architecture

The page follows a clear F-pattern visual hierarchy:

  1. Visual anchor: The 404 graph immediately draws the eye and establishes context
  2. Headline: Large, white text announces the situation
  3. Key reassurance: Color-coded teal message stands out as the most important information
  4. Explanation: Gray body text provides context without overwhelming
  5. Primary action: Bright teal button is the obvious next step
  6. Secondary options: Clearly labeled alternative paths

Whitespace Strategy

Generous spacing between each section prevents cognitive overload - crucial for users who may already feel stressed about encountering an error on a financial platform.

Functional Elements

Primary CTA: "← Back to home"

  • Directional arrow provides clear visual guidance
  • Plain language ("home" not "dashboard") is universally understood
  • High contrast button makes the action unmistakable

Secondary Navigation: "OR TRY THESE:"

Provides multiple pathways without cluttering the primary action:

  • My Dashboard: For users who want to return to their main workspace
  • Learning Center: Reinforces that Basics is educational, not just transactional
  • Get Help: Acknowledges some users may need human assistance

Footer Context

The brief platform description serves users who may have landed on this page from an external link, explaining what Basics does and building trust even in an error state.

Responsive Design

The mobile version maintains all desktop functionality while adapting to smaller screens:

  • Consistent visual hierarchy
  • Touch-friendly button sizes (minimum 44px height)
  • Readable text without zooming
  • Maintained color contrast ratios

Basics - 404 Error Page  1

Basics - 404 Error Page  2

Tools used

ChatGPT
Claude
Figma

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1 review


Great work! This is really in depth, I'm happy to see you describing your design rationale here and including responsive design!

It's also extremely clear what kind of product this 404 page is for and does awesome at providing that user with alternative CTAs to point them toward other actions on the site. The copy "We lost this page. But your money? Safe and sound." works really well to establish trust and convey brand voice. Awesome job!


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