When someone blocks your phone number or social media account, the way in which their messages appear to you can vary depending on the platform or app you are using.

In general, when you send a message to someone who has blocked you, the message will either not be delivered or will be delivered but not seen or acknowledged by the recipient. This means that you may not receive any type of notification or indication that your message has been blocked or not delivered.
On some platforms, such as iMessage or WhatsApp, you may see a single grey tick or no tick at all next to the message you sent. This indicates that the message has been sent but not delivered. On other platforms, such as Facebook Messenger, you may see a message saying that the message was sent but not delivered, or that the message was not delivered because the recipient is no longer on Facebook.
It is important to note that not all platforms will give you any indication that your message has been blocked. In some cases, messages may simply disappear into the ether, without any notification or explanation.
Another thing to keep in mind is that the way in which messages appear when you are blocked may depend on the settings of the person who has blocked you. For example, on some platforms, such as Instagram, the person who has blocked you may choose to hide their profile entirely from you, meaning that you will not be able to see any messages or interactions from them at all.
In general, if you suspect that you have been blocked by someone, it is best to assume that your messages will not be seen or acknowledged. It is also important to respect the privacy and boundaries of the person who has blocked you, and to refrain from repeatedly attempting to contact them through other channels or means.
In conclusion, the color of texts when you are blocked can vary depending on the platform or app you are using. In some cases, you may see a grey tick or no tick at all next to your message, while in other cases, you may not receive any indication that your message has been blocked or not delivered. It is important to respect the privacy and boundaries of the person who has blocked you, and to refrain from repeatedly attempting to contact them through other means.