Use CTRL + Enter to send a Discord Embedified message. You'll need to provide your account token to the code, on line 3. Will be removed if you refresh. Highlighting a selection of your message will let you send only that as the embed, and the rest as a normal message.

main.js

(function start_embed_generator(window, document) {

var my_token = "-YOUR_TOKEN_HERE-";
var color_reg = /(\#.+?)(\s|$)/;
var text_bar_color = "rgb(92, 156, 199)";

window.addEventListener('keydown' , handle_event);
window.addEventListener('keyup'   , revert_bar  );
return !console.log("Embed generator up!");

function handle_event(event) {
    var embed, text_bar, text_area, highlighted, not_highlighted;
    if (!event.ctrlKey) return;
    text_bar = document.getElementsByClassName('channel-textarea-inner')[0];
    if (!text_bar) return;
    if (!text_bar.style.borderColor) text_bar.style.borderColor = text_bar_color;
    if (event.keyCode !== 13) return;
    text_area = text_bar.children[1];
    if (!text_area || text_area.value === "") return;
    if (text_area.selectionStart !== text_area.selectionEnd) {
        highlighted = text_area.value.slice(text_area.selectionStart, text_area.selectionEnd);
        not_highlighted = text_area.value.replace(highlighted, "");
    }
    send_request(resolve_channel_id(), format_embed(highlighted || text_area.value), not_highlighted);
    return void(text_area.value = "");
}

function send_request(channelID, embed, content) {
    var url = `https://discordapp.com/api/v6/channels/${channelID}/messages`;
    var opts = {
        method: 'POST',
        headers: {"Authorization": my_token, "Content-Type": 'application/json'},
        body: JSON.stringify({ content: content || "", embed: embed })
    };
    return fetch(url, opts).catch(console.error);
}

function format_embed(string) {
    var match, color = null;
    if ( match = string.match(color_reg) ) {
        color = parseInt(match[0].slice(1, match[0].length), 16);
        string = string.replace(match[0], "");
    }
        
    return {
        description: string,
        color: color || 0,
    }
}

function resolve_channel_id() {
    var path = window.location.pathname;
    return path.slice( path.lastIndexOf("/") + 1, path.length );
}

function revert_bar(event) {
    if (event.keyCode !== 17) return;
    var text_bar = document.getElementsByClassName('channel-textarea-inner')[0];
    if (!text_bar) return;
    return text_bar.style.borderColor ? void(text_bar.style.borderColor = "") : false;
}

})(window, document);

This limits the regex to the very beginning and end of a message. Otherwise, you run the risk of accidentally capturing something that wasn't intended to be captured.

/*
Code...
*/

var color_reg = /((^(#[0-9a-fA-F]{3}){1,2})|((#[0-9a-fA-F]{3}){1,2}$)){1}/;

/*
...More code...
*/

function format_embed(string) {
        var match, color = null;
        if ( match = string.match(color_reg) ) {
            color = parseInt(match[0].slice(1, match[0].length), 16);
            string = string.replace(match[0], "");
        }

/*
...The last of the code
*/

Nice!

not working anymore. try pressing ctrl+enter but its not working