Change text color in delphi (Console application)

You can use SetConsoleTextAttribute as already commented to the question. Example:

program Project1;

{$APPTYPE CONSOLE}

{$R *.res}

uses
  System.SysUtils, winapi.windows;

var
  ConOut: THandle;
  BufInfo: TConsoleScreenBufferInfo;
begin
    writeln('yes just give me a minute, i need to talk to the manager');

    // get console screen buffer handle
    ConOut := TTextRec(Output).Handle;  // or GetStdHandle(STD_OUTPUT_HANDLE)

    // save current text attributes
    GetConsoleScreenBufferInfo(ConOut, BufInfo);

    // set foreground color to red
    SetConsoleTextAttribute(TTextRec(Output).Handle, FOREGROUND_INTENSITY or FOREGROUND_RED);

    writeln('Oi Dave we got another thick one shall i just pass him through as self employed');

    // reset to defaults
    SetConsoleTextAttribute(ConOut, BufInfo.wAttributes);

    writeln('Dont worry u dont have to complete this one');
    readln;
end.

Minimum required reading: SetConsoleTextAttribute and character attributes.

Don't forget to add error handling.