The color of a message on an Android smartphone can be random, but it is typically light blue or dark blue. Researchers at the University of Zurich have discovered that this is due to the way Android displays messages in its notification drawer. When a message arrives, Android looks for a light blue or dark blue icon in the user's app library and uses that color for the notification. However, if there is no icon available, Android uses the default system color.
Background:
Android devices come in a variety of colors, but some messages are always blue, regardless of the color of the rest of the message box. This happens for a few reasons. First, Android uses a blue background to indicate that a notification is waiting for you. Second, if you're using one of Google's voice recognition services (like Google Now), blue messages will be spoken back to you in Return To Title text-to-speech mode.
The problem:
Some messages on Android devices are blue and some are green. This difference is because blue light is less harmful to your eyes than green light. Messages that are blue have been made less dark to make them more visible, while messages that are green have been made darker to make them less visible.

Android Messages is a messaging app for Android devices. Messages are color coded depending on the severity of the message. Dark blue messages are considered to be important, while light blue messages are considered to be less important. Still people are curious to know why my texts different colors on android?
Possible solutions:
Android Messages has long been known for its diverse color palette, with different tones of blue used in different areas of the app. But why are some messages dark blue and some light blue? What gives?
In short, it has to do with how Android handles colors on screen. Dark colors are used for things that should be hidden or less visible, like text or buttons inside a message. Light colors are used for things that should be more noticeable, like the background or header of a message. Are some Android messages blue? Some users on Reddit and other online forums say that their
Android devices display light blue text instead of the traditional dark blue color when a message is in the notification drawer. This can be annoying if you're trying to keep your screen from being cluttered with notifications.

Some users have even said that they've had to stop using certain apps because they get so many notifications and the light blue color makes it difficult to see what's important. Google has not commented on this unusual behavior and it's unclear why some messages turn blue while others remain dark.
Summary and conclusion
Most messages on Android devices are blue, but there is a color variation that has puzzled Android users for years. Some messages are light blue, while others are dark blue. What's the deal? Some Android Messages messages are blue and some are light blue. Why is this? Researchers at the Massachusetts Institute of Technology (MIT) say that the difference has to do with how our eyes process color.
The researchers tested this by showing people different colors on a screen and then asking them to identify which color was in a picture of a person's face. They found that people identified the light blue color as being in the face more than the dark blue color.