Using LATEX
\mathfrak{}
mathfrak1234
\mathrm{}
mathrm1234
\mathcal{}
mathcal1234
\mathbb{}(大写字母和小写k)
MATHBBk123456
\mathit{}
mathit1234
\textit{}
textit1234
{\color{色调}表达式}
背景颜色:{\color{文字色调}\colorbox{背景色调}{表达式(可以打中文)}}
Aquamarine
Black
Blue
BlueViolet
Brown
CadetBlue
CornflowerBlue
Cyan
DarkOrchid
ForestGreen
Fuchsia
Goldenrod
Gold
Gray
CadetBlue
Green
GreenYellow
Lavender
LimeGreen
Magenta
Maroon
Orange
OrangeRed
Orchid
Plum
Purple
Red
RoyalBlue
Salmon
SeaGreen
SkyBlue
SpringGreen
Tan
Thistle
Turquoise
Violet
White←white
Yellow
YellowGreen