.avif)
.svg)
.svg){kind=small}
Should Flat UI Colors be used in 2025?
Flat UI Colors? It's the kind of tool that every designer has come across at some point, a go-to resource for simple and effective flat color palettes. But in 2025, is it still a good idea to use it for your visual designs? Simplicity, features, limitations... I've been using Flat UI Colors for several years now, and here I share my feedback and objective opinion on its real usefulness depending on your needs.
My experience with Flat UI Colors
Since I started working on the web, Flat UI Colors has become one of my go-to tools. I've been using it for years, whether for quick prototypes at Easy Web or to inspire client visual identities. What I love most of all is how incredibly simple it is to choose harmonious, contemporary palettes.
It's a major asset when starting a project, quickly prototyping an interface, or simply finding a visual direction. The colors offered are modern and designed to blend naturally, avoiding errors in taste from the very first drafts.
However, this is not a comprehensive solution. It remains a tool for inspiration, a starting point. For advanced needs such as design systems, advanced colorimetric exploration, or WCAG accessibility testing, more comprehensive platforms will be required.
Is Flat UI Colors really useful for my needs?
The real question before using Flat UI Colors is: what is your goal? Its relevance depends greatly on how you use it. Its role? To quickly inspire flat design projects. Need a simple, consistent palette without wasting time? This is your ally. For me, it's the perfect tool for a quick visual draft or an instant creative boost.
Whether you're a front-end developer working on an MVP, a junior designer looking for colorimetric basics, or a solo entrepreneur refreshing your landing page, Flat UI Colors is incredibly effective. For a quick prototype, a client mockup to validate, or immediate colors, you'll save precious time. It's the tool that helps you move forward quickly, without getting bogged down in choices.
Its other major advantage? Its disarming simplicity. Zero learning curve, zero frills. The tool takes the mental burden of color decisions off your shoulders when your priority is speed and a clean, no-nonsense result. That's pure efficiency.
Is Flat UI Colors suitable for beginners?
For a beginner getting started in design, Flat UI Colors is like the ideal co-pilot, helping you avoid writer's block. You know that moment when you don't know where to start with colors? This tool removes that barrier. It instantly provides you with pre-selected, consistent palettes that are perfect for a quick first mockup, a simple website, or even a client presentation. No more wasting hours searching for the right shade—you can focus on the structure.
It's a real learning accelerator. By using Flat UI Colors, you naturally integrate design and colorimetry principles without even realizing it. You learn the power of harmonious colors by applying them directly, without being overwhelmed by complex theory. For quick projects or prototypes, it ensures professional visual consistency. It's an excellent springboard for understanding the basics and quickly gaining confidence in your color choices.
How much does Flat UI Colors cost?
We know that budget is a critical issue, especially when you're running an agency or working as a freelancer. But with Flat UI Colors, it's simple: cost is not an issue. This tool is completely free, and that's its great strength.
There are no premium plans or subscription tiers here. Flat UI Colors is an open-source resource, designed to be accessible to 100% of the design community. Whether you're a seasoned UX/UI designer, a web agency looking to optimize its spending, or even a student just starting out, you can access ready-to-use color palettes without spending a dime. It's a real boost to get started quickly and effectively, without the burden of your wallet. That's the power of sharing in our industry.
What are the key features of Flat UI Colors?
You know, choosing the right color palette is often a headache for me and my teams at Easy Web. The greatest strength of Flat UI Colors lies in its disconcerting simplicity. The tool offers you a collection of colors designed for flat design, which are harmonious and modern, without you having to dive into hours of color theory. It's a valuable asset for quickly launching mockups or prototypes with a solid and consistent aesthetic foundation, saving you a significant amount of time when sprints are short.
But where Flat UI Colors really becomes an indispensable ally is with its instant copy feature. Imagine: one click on the color of your choice, and its HEX, RGB, or RGBA code is directly in your clipboard. No more tedious manual selections or typing errors! This efficiency is crucial for the integration of our designs. It streamlines the transition from design to implementation, allowing designers and developers to work seamlessly together, and believe me, that changes everything.
Accessibility is non-negotiable in 2025. Flat UI Colors, despite its apparent simplicity, includes a crucial feature: contrast checking. For us at Easy Web, this saves us a huge amount of time. No more juggling between external tools to ensure that our texts remain legible on any background. You select a color, and presto, it tells you its WCAG (Web Content Accessibility Guidelines) compliance, saving you painful customer feedback or user experience issues.
What makes Flat UI Colors really useful for an agency like ours is its export flexibility. You can copy HEX or RGB codes, of course, but the tool goes further than that. It allows you to export the palette in various formats, such as SCSS or LESS variables. This is a detail that makes all the difference for frontend developers. No more manual copy-paste errors, handovers become seamless, and the integration of the graphic charter is flawless from the very first attempt.
Flat UI Colors is great for getting started quickly, but I soon saw its limitations on more challenging projects. If you need to adhere to a complex color scheme, manage multiple color states (hover, active, etc.), or ensure strict compliance with accessibility standards (WCAG), its fixed palettes quickly become a hindrance. It is not designed to generate dynamic color systems or subtle shades.
For these specific scenarios, tools such as Coolors or Adobe Color are more suitable, offering true exploration and generation of complex palettes, sometimes even with built-in accessibility checks. They give you the depth that Flat UI Colors cannot. But beware, Flat UI Colors remains unbeatable for ultra-fast prototyping or for bringing an MVP to life in the blink of an eye.
So, to summarize my opinion on Flat UI Colors:
Advantages:
- Ultra-fast implementation.
- Disconcertingly easy to use.
- Perfect for wireframes and MVPs.
Disadvantages:
- Lack of flexibility for demanding projects.
- Limitations for advanced accessibility.
- Little control over specific nuances.
FAQ
Is it reliable and secure?
Absolutely. Flat UI Colors is a static resource, reliable by nature: it provides constant hexadecimal and RGB codes, without variation. In terms of security, the tool's simplicity is a major advantage. It does not collect any personal data, requires no login or download, effectively eliminating the risk of privacy breaches or malware. It is a safe and consistent color library for all your design projects.
Is it compatible with my other tools?
Absolutely. This tool is designed for universality. It provides you with ready-to-use color codes (hexadecimal, RGB). You can copy and paste them directly into most design software such as Figma, Sketch, Adobe XD, Photoshop, or even your CSS code editors. No need for complex plugins or specific integrations. It's this simplicity that makes it so effective at fitting naturally into all designer workflows, regardless of the ecosystem you use.
Is there responsive customer support?
Honestly, for a tool like Flat UI Colors, you're not looking for traditional customer support. It's a simple, free resource, often maintained by a small team or a passionate developer. "Responsiveness" is more evident through community contributions or bug reports on platforms such as GitHub. You won't have a hotline, but is that really necessary for copying and pasting a color code? Its simplicity is its own support. We use it for its speed and reliability, not for complex after-sales service.
What do other users think?
Clearly, the majority of feedback is very positive about its simplicity and speed. It's a real Swiss Army knife for emergencies or rapid prototyping. Front-end developers really appreciate it for its ease of integration. On the other hand, more experienced designers, who are looking for very specific palettes or advanced customization, may sometimes find it a little limiting. It is rarely used as the sole source of colors for a large-scale project, but rather as an excellent starting point or occasional support.
Can I easily change later?
No, not as easily as with CSS variables or design tokensFlat UI Colors provides you with static hexadecimal codes. If you integrate them directly into your code without associating them with variables (such as --primary-color: #3498db;), changing a color involves manually searching through your style sheet for each occurrence. For simplified maintenance and true flexibility, use Flat UI Colors as a source of inspiration, then map these values to your own CSS variables. This is best practice for the long-term scalability of your project.
Alternatives
.svg)
.avif)
Specializing in business creation, sales and digital marketing, he puts his expertise at the service of users to help them identify the solutions best suited to their needs. Passionate about digital innovation and online performance optimization, Alexis is committed to providing detailed, transparent and unbiased comparisons.
Do you have an entrepreneurial project?
We support you in structuring and developing your tech project. Make an appointment with one of our Business Strategists.