In the header, you can define the dark border color separately.
Basic Grammar

Grammar explanation
When defining colors, you can use English color names or hexadecimal color values.
File example: 10-38.htm
Set the color of the dark border of the header.
01
02
03
04
05
06
07
08
09
10

Mainstream web design software

11
12
13

14
15
16
17
18
19
20
21

网页图像软件	Fireworks
网页制作软件	Dreamweaver
网页动画软件	Flash

12
13 Web image software Fireworks
14 TR>15
16 Web page production software Dreamweaver 17 18
19 Web animation software Flash20 21 22 23 File Description Line 13 defines the dark border color of the header as #FF0000.