파란색이 잘 안보여요.

vi는 잘 모르겠습니다만 터미널에서 사용되는 색깔은 바꿀 수 있습니다.

dircolors라는 명령을 사용하시면 됩니다.

/etc/DIR_COLORS라는 파일이 있다면 적당히 편집해서 사용하시면 되구요.

만약 없다면 다음과 같이 만들어주시면 됩니다.

~/.bashrc에 다음 줄 추가
eval `dircolors /etc/DIR_COLORS`

참고로 dircolors 앞의 문자는 숫자 1옆에 있는 문자입니다.

/etc/DIR_COLORS

# Configuration file for dircolors, a utility to help you set the
# LS_COLORS environment variable used by GNU ls with the --color option.

# The keywords COLOR, OPTIONS, and EIGHTBIT (honored by the
# slackware version of dircolors) are recognized but ignored.

# Below, there should be one TERM entry for each termtype that is colorizable
TERM linux
TERM linux-c
TERM mach-color
TERM console
TERM con132x25
TERM con132x30
TERM con132x43
TERM con132x60
TERM con80x25
TERM con80x28
TERM con80x30
TERM con80x43
TERM con80x50
TERM con80x60
TERM xterm
TERM xterm-debian
TERM rxvt
TERM screen
TERM screen-w
TERM vt100

# Below are the color init strings for the basic file types. A color init
# string consists of one or more of the following numeric codes:
# Attribute codes:
# 00=none 01=bold 04=underscore 05=blink 07=reverse 08=concealed
# Text color codes:
# 30=black 31=red 32=green 33=yellow 34=blue 35=magenta 36=cyan 37=white
# Background color codes:
# 40=black 41=red 42=green 43=yellow 44=blue 45=magenta 46=cyan 47=white
NORMAL 00       # global default, although everything should be something.
FILE 00         # normal file
DIR 01;33       # directory
LINK 01;36      # symbolic link
FIFO 40;33      # pipe
SOCK 01;35      # socket
#DOOR 01;35     # door
BLK 40;33;01    # block device driver
CHR 40;33;01    # character device driver
ORPHAN 40;31;01 # symlink to nonexistent file

# This is for files with execute permission:
EXEC 01;32

# List any file extensions like '.gz' or '.tar' that you would like ls
# to colorize below. Put the extension, a space, and the color init string.
# (and any comments you want to add after a '#')

# If you use DOS-style suffixes, you may want to uncomment the following:
#.cmd 01;32 # executables (bright green)
#.exe 01;32
#.com 01;32
#.btm 01;32
#.bat 01;32

.tar 01;31 # archives or compressed (bright red)
.tgz 01;31
.arj 01;31
.taz 01;31
.lzh 01;31
.zip 01;31
.z   01;31
.Z   01;31
.gz  01;31
.bz2 01;31
.deb 01;31
.rpm 01;31

# image formats
.jpg 01;35
.png 01;35
.gif 01;35
.bmp 01;35
.ppm 01;35
.tga 01;35
.xbm 01;35
.xpm 01;35
.tif 01;35
.png 01;35
.mpg 01;35
.avi 01;35
.fli 01;35
.gl 01;35