What you can and cannot change about message colors on iPhone
iPhone does not let you change the color of individual text messages or the color of the message bubbles themselves through built-in settings. The color of your messages — blue for iMessage, green for SMS — is determined by the type of message being sent, not by a choice you make. You cannot turn a blue iMessage bubble green or vice versa by selecting a color option.
What you can change is the color of the conversation thread itself in the Messages app. You can assign a custom color to a specific conversation, which changes how that thread appears in your message list and in the conversation header. This is different from changing the message bubbles, but it is the closest option iPhone offers for personalizing how your messages look.
Some third-party messaging apps available on the App Store do offer more control over message appearance, including bubble colors and text colors, but these are separate apps from Apple's built-in Messages app and require both you and the person you are messaging to use the same app.
Key Takeaways
- iPhone's Messages app does not allow you to change the color of message bubbles or text — blue indicates iMessage and green indicates SMS, and this is automatic.
- You can assign a custom color to an entire conversation thread, which changes how that conversation appears in your message list.
- To color-code a conversation, open the thread, tap the contact name at the top, scroll down, and select a color from the options provided.
- Third-party messaging apps like WhatsApp, Telegram, and others offer more customization options for message appearance, but both people must use the same app.
How to assign a color to a conversation thread
To give a conversation its own color in your message list, open the Messages app and find the conversation you want to color-code. Tap the conversation to open it, then tap the contact's name or phone number at the top of the screen. This opens the conversation details panel.
Scroll down in this panel until you see the color options. You will see a row of colored circles — typically including red, orange, yellow, green, blue, purple, and pink. Tap the color you want to assign to this conversation. The conversation thread will now appear with that color in your message list and in the conversation header, making it easier to spot at a glance.
This color assignment is personal to your phone only. The other person will not see the color you chose — it only affects how the conversation appears on your device. You can change or remove the color at any time by following the same steps and selecting a different color or the option to remove the color.
Why iPhone message bubbles are blue or green
The color of your message bubbles is determined by the protocol being used to send the message, not by any setting you control. iMessage is Apple's encrypted messaging service that works between Apple devices over data or Wi-Fi. When you send an iMessage, the bubble appears blue on both your screen and the recipient's screen.
SMS (Short Message Service) is the standard text message protocol that works on any phone. When you send an SMS message, the bubble appears green on your screen. The recipient sees it as a regular text message on their device, regardless of what color it appears on yours.
iPhone automatically chooses which protocol to use based on whether the recipient has an Apple device and iMessage enabled. If the recipient has iMessage turned on, your message sends as blue iMessage. If they do not have iMessage or are using an Android phone, your message falls back to green SMS. You cannot override this choice — it happens automatically based on what the other person's device supports.
Third-party apps that offer more color customization
If you want more control over message appearance, several messaging apps available on the App Store let you customize colors, fonts, and bubble styles. WhatsApp allows you to change the chat bubble colors and text colors through its settings, though the options are somewhat limited. Telegram offers more extensive customization, including the ability to change theme colors and message bubble appearance.
Other apps like Signal, Viber, and Facebook Messenger also provide various levels of customization for how messages look. The trade-off is that both you and the person you are messaging must have the same app installed and be using it to message each other. You cannot use these apps to customize the appearance of regular SMS text messages or iMessages — they only work within their own platforms.
If you use one of these apps regularly, you can customize it to your preference and then use iPhone's built-in color-coding feature on top of it. For example, you could assign a red color to your WhatsApp conversation thread while also customizing WhatsApp's own theme colors in the app's settings.
Limitations of message appearance on iPhone
iPhone does not let you change text color, font style, or bubble shape for individual messages or conversations within the Messages app. Some other phones and messaging platforms offer these features, but Apple's approach is more limited. This is partly by design — Apple prioritizes a consistent, simple interface across all conversations.
You also cannot change how messages appear on someone else's phone. If you send a blue iMessage, it will be blue on their screen too, but you cannot make it appear red or any other color on their device. The color is determined by the message type and the recipient's device, not by your preferences.
If message appearance is important to you, the most practical option is to use a third-party app that offers the customization you want, or to use iPhone's conversation color-coding feature to organize your message list visually without changing the actual message bubbles.
How to organize conversations without changing message colors
Beyond color-coding, you can organize your conversations in other ways. You can pin important conversations to the top of your message list by opening a conversation, swiping left, and tapping the pin icon. Pinned conversations stay at the top regardless of when you last messaged that person.
You can also mute notifications for specific conversations so you are not distracted by constant alerts, or you can use the search function to find old messages quickly. Combining these features with the color-coding option gives you several ways to keep your message list organized without needing to change the appearance of the messages themselves.
Frequently Asked Questions
Can I change the color of text messages I receive from someone else?
No. The color of incoming messages is determined by the message type — blue for iMessage, green for SMS — and you cannot change it. You can only assign a color to the entire conversation thread, which affects how that conversation appears in your message list, not the individual message bubbles.
Why are some of my messages blue and some green when I message the same person?
This usually means iMessage is failing to send for some messages and falling back to SMS. This can happen if you are in an area with poor data connection, if iMessage is temporarily unavailable, or if the other person's iMessage status changes. Once the connection improves, messages should send as blue iMessage again.
Do third-party messaging apps work with regular text messages?
No. Apps like WhatsApp and Telegram only work when both people are using the same app. They cannot customize the appearance of regular SMS text messages or iMessages. If you want to use a third-party app, the other person must download and use it too.
If I color-code a conversation, will the other person see that color?
No. The color you assign to a conversation is only visible on your phone. The other person will not see any indication of the color you chose — it is purely for your own organization and reference.
Can I change the font or size of text in the Messages app?
You cannot change the font within the Messages app itself, but you can change the overall text size on your iPhone through Settings. Go to Settings, tap Display & Brightness, then Text Size, and adjust the slider. This will make text larger or smaller across most apps, including Messages.