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Understanding the Why’s in designing

We have been ingrained with a lot of rules and regulations since our childhood. And out of curiosity, whenever we asked why, the answer was- some traditions and customs must be followed…😤

And this didn’t end there, even in UI/UX too, the same is followed even today.

So many rules and no clear explanation of  Why.❓

In this blog, we’ll try to understand the reasons why certain guidelines must be followed when designing. For example, why we shouldn’t use red background on blue and vice-versa? Why button should have a certain touch area? And so on.
To begin with, the majority of the rules related to the design are actually connected with how the human body is structured or as we call it, Designed. Not clear? We’ll go one by one discussing the reasons behind most widely used 6 rules. 

1. Why is Red font on a blue background is big NO ❌?


The choice of font color and the background color is usually based on factors such as contrast, legibility, and aesthetic appeal. However, it is important to ensure that the combination of colors provides good contrast, making the text easy to read. But why is it hard to read?

This occurs because of Chromostereopsis, which is a visual illusion that happens when certain colors are placed next to each other, making it unnecessarily difficult to stay focused on both colors. The illusion is due to the stimulating of different areas within the eye, causing some light rays to coincide with others in the eye. Because of this, it becomes difficult for the human eye to focus on them.

2. Why Recognition is better than recall?

Don’t let users remember!
As a designer, we should always try to reduce the user’s memory load by keeping objects, actions, and options visible. The user shouldn’t have to recall details from one section of the dialogue to the next.
Why?
Because of short-term memory. 

The majority of the information in short-term memory will be stored only for about 20 to 30 seconds, or even less, and can last for up to just a minute.


Most information decays quickly, unless we rehearse it. We remember 7 things, +/- 2 in short-term memory. Recent research shows a decrease to 4 things +/- 1.
That’s how our brain is designed. So it becomes hard for the users to remember information, it’s always best to recognize the information than recalling.

Oops! I forgot which account number I selected 🤯😶‍🌫️


3. Why Larger Button size (touch area) must be used? 

​​The button size should not be less than 42 pixels(not a hard and fast rule). This is not because of visual appeal, balance, etc., but because of the thumb/ finger touch area. The smaller the size, difficult it becomes for the user to perform actions using the button or icons in that case. And larger items are easy to see.


4. Why too many Fixations isn’t good for the user? 

The brain assembles a continuous visual experience from a sequence of fixations and saccades, making vision continuous. Fixation is the location at which our eyes fixate and a saccade is a fast, simultaneous movement of both eyes between two or more phases of fixation in the same direction.
Things that attract the scan are bright colors, big numbers, people, etc.
Too many fixations make it difficult to scan through the design, it recreates too much cognitive load. So we have to reduce eye fluctuation to keep the focus and to get the work done easily and efficiently.


5. Why is the Floating icon always on the right end?


Ever wonder why floating icons are on the right end of the phone? This is because of the way people naturally read and scan content. The floating icon concept is connected with how our motors (hands) and eyes function. In many cultures, people read and scan content from left to right. This means that their eyes are more likely to start on the left side of the screen and move toward the right. And also most Indians are right-handed and the right end is the easiest area to be accessed while using the phone. Anywhere on the top becomes difficult to access.


6. Why success icon is green and the alert red?


The use of green and red colors to represent success and alert respectively is commonly used in user interface design. This is based on the psychological associations that people tend to have with these colors. Green is often associated with positive emotions such as growth, harmony, and success, while red is associated with danger, warning, and urgency.

And in the real world, the traffic signal-go is green, and the stop is red. Using the same color for success and alert becomes easy to associate with less or no cognitive load.

Wrapping Up:

These are just a few whys and they are many more. Learning the why behind these rules may help in making work more meaningful and becoming a good designer. 

Hope you found this article helpful. 

Want to know more about designing?

Read our blog: Iteration Leads to powerful results in Design

About the Author: 

Charishma is a UI/UX designer at Mantra Labs, who believes in creating experiences that matter. She is an MBA turned designer who fell in love with the process of how design is made.

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Sales Applications Are Disrupting More Than Just Sales

Sales success today isn’t about luck or lofty goals—it’s about having the right tools in your team’s hands, wherever they go. Following our earlier in-depth exploration of sales technology, we will now examine how cutting-edge sales apps are becoming the backbone of modern industries, transforming complex workflows into seamless, growth-driving machines.

From retail to healthcare, logistics to real estate, businesses are deploying sales applications to enhance operational transparency, cut redundant tasks, and build intelligent sales ecosystems. These tools are not only digitizing workflows—they’re driving growth, improving engagement, and redefining how field teams operate.

Lead Ecosystems: Unified visibility across channels

One app. Five workflows. Zero friction.

A leading insurance brand relaunched their app—a sleek, powerful sales companion that’s turning everyday agents into top performers.

No more paperwork. More time to sell.

Here’s what changed:

  • Every visit is tagged, tracked, and followed through. Renewals? Never missed. Leads? Fully visible.
  • Attendance and reimbursements went on autopilot. No more manual logs. No more chasing approvals.
  • New business and renewals are tracked in real time, with accurate forecasting that sales leaders can finally trust.
  • Dashboards are clean, configurable, and useful—insights that move the business, not just report on it.
  • Seamless Integrations. API connectivity with Darwin Box, IMD Master Data, and SSO authentication for a unified experience.

The result? A field team that moves faster, sells better, and works smarter.

Retail: Taking Orders from the Frontline—Smartly

Field sales agents in retail, especially FMCG, used to rely on gut instinct. Now, with intelligent sales applications:

  • AI recommends what to upsell or cross-sell based on previous order patterns
  • Real-time stock availability and credit status are visible in the app
  • Geo-fencing ensures optimized route planning
  • Built-in payment collection modules streamline transaction closure

Healthcare: Structuring Sales with Compliance and Precision

Healthcare leaders don’t need more reports—they need better visibility from the field.  Whether it’s engaging hospital networks, onboarding clinics, or enabling diagnostics at the last mile, everything needs precision, compliance, and clarity. 

Mantra Labs helped a leading healthcare enterprise design a sales app that integrates knowledge, compliance, performance, and recognition, turning frontline agents into informed, aligned, and empowered brand advocates. 

Here’s what it delivers:

  • Role-based onboarding that keeps every level of the field force aligned and accountable
  • Escalation mechanisms are built into the system, driving transparency across commissions and performance reviews
  • A centralized Knowledge Hub featuring healthcare news, service updates, and training modules to keep reps well-informed
  • Recognition modules that celebrate milestones, boost morale, and reinforce a culture of excellence

Now, the field agents aren’t just connected—they’re aligned, upskilled, and accountable.

Real Estate: From Cold Calls to Smart Conversions

For real estate agents, timing and personalization are everything. Sales applications are evolving to include:

  • Virtual site tour integration for remote buyers
  • Mortgage and EMI calculators to increase buyer confidence
  • WhatsApp-based lead capture and nurture sequences
  • CRM integration for inventory updates and automatic scheduling

Logistics: From Chaos to Control in Field Coordination

Field agents in logistics are switching from clipboards to real-time command centers on mobile. Modern sales applications offer:

  • Live delivery status and route deviation alerts
  • Automated dispute reporting and issue resolution tracking
  • Fleet coordination through integrated GPS modules
  • Customer feedback capture and SLA dashboards

What’s new & what’s next in Sales Applications?

Here’s what’s pushing the next wave of innovation:

  • Voice-to-Text Logging: Agents dictate notes while on the move.
  • AI-Powered Nudges: Apps that suggest next-best actions based on behavior.
  • Omnichannel Communication: In-app chat, WhatsApp, email—unified.
  • Role-Based Dashboards: Different data views for admins, managers, and field reps.

What does this mean for Business Leaders?

Sales Applications are not just tactical tools. They’re platforms for transformation. With the right design, integrations, and analytics, they:

  • Replace guesswork with intelligence
  • Reduce the cost of delay and manual labor
  • Improve agent accountability and transparency
  • Speed up decision-making across hierarchies

The future of field sales lies in intuitive, AI-driven applications that adapt to every industry’s nuances. At Mantra Labs, we work closely with enterprises to custom-build sales applications that align with business objectives and ground-level realities.

Conclusion: 

If your agents still rely on Excel trackers and daily call reports, it’s time to reimagine your sales operations. Let us help you bring your field operations into the future—with tools that are fast, field-tested, and built for scale.

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