Neither red nor green is the right primary-button color by default. Choose a button style based on what the action does, the interface’s established design system and the consequences of a mistaken click. Make the action clear in its label, too: color should reinforce meaning, not carry it alone.
Should a primary button be red or green?
Use the product’s established primary-button style for ordinary actions, whether that style is red, green or another accent color. A primary button should make the main task easy to find; its hue is not a universal signal that one option is safer or more effective.
Apple’s Human Interface Guidelines for buttons say to use the app’s accent color for the primary button and system red for a destructive button. Apple also cautions: “Don’t assign the primary role to a button that performs a destructive action, even if it’s the most likely choice.” The distinction is about the action’s role and consequences, not a general rule that red means “no” or green means “yes.”
Choose color according to the action and its risk
For routine actions
Use the interface’s usual primary style for actions such as saving, continuing or submitting. Give the button a specific verb phrase, such as “Save changes” or “Continue,” so people can tell what will happen without interpreting its color.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
For destructive actions
Deleting data or taking another destructive action warrants a distinct treatment and explicit wording, such as “Delete account.” Do not make that action the prominent primary choice merely because it is likely to be selected. Keep a neutral alternative, such as “Cancel,” available and easy to distinguish.
The U.S. Department of Veterans Affairs’ button design decisions describe pairing red with a text label to indicate a destructive action without relying on color alone, and recommend placing the destructive action after the neutral action.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Make the meaning accessible without color
Red and green alone are an unreliable way to distinguish actions. The W3C’s guidance for WCAG Success Criterion 1.4.1 says: “Color is not used as the only visual means of conveying information, indicating an action, prompting a response, or distinguishing a visual element.” Mozilla also notes that red-green color vision deficiencies can make these hues difficult to distinguish.
Use a clear label and, where it helps, another visible cue such as an icon, placement or text style. These cues should reinforce the button’s meaning rather than leave people to infer it from hue.
Recommended Free Tools
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Check contrast, boundaries and focus
Check that button text is legible against its background. Also check the control’s visible boundary when that boundary is needed to identify it, and ensure the keyboard focus indicator is visible. W3C’s explanation of non-text contrast notes that context, position or text style can help identify a control; if a visual indicator is the only way to identify it, that indicator needs sufficient contrast.
Use the design system consistently
Follow the product’s established button styles and conventions so users do not have to relearn them on each screen. Make a deliberate exception when an action’s semantics—especially destructive consequences—call for a different treatment, and preserve clear wording and non-color cues.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
What the evidence does—and does not—show
The cited guidance provides accessibility requirements and design-system recommendations; it does not establish a universal experimental winner between red and green buttons or prove that either hue improves conversions across interfaces. Claims that one color always performs better are not supported by these sources. If performance in a particular product matters, evaluate the actual action, label, layout and audience rather than assuming a color will have the same effect everywhere.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →
