The kernel does not have a filesystem to write to during most of boot, so if the boot failed, you may be out of luck. However, it does keep a log in memory (including what you see on the console) and once it does have a rw fs, that stuff is dumped into
You can also view the kernel log starting from the beginning with
dmesg (probably you want to use
dmesg | less).
However, I don't think the kernel uses colored emphasis (in any case, the color itself won't be in a log), implying this is a system service. Some of those also start before a rw filesystem is available, and if that's the case, there may be no record of the message at all. Otherwise their stuff should also be in
You can also try SCROLL LOCK, or ctrl-S (pause) ctrl-Q (continue) during boot. There's also a "boot_delay" parameter that can be put on the kernel command-line (e.g. in grub.conf).
boot_delay = Milliseconds to delay each printk during boot.
Values larger than 10 seconds (10000) are changed to
no delay (0).
Hopefully at least one of these works for you.