在8位色值中，透明度通常使用ARGB格式，其中A表示Alpha通道（透明度），R、G、B分別表示紅色、綠色和藍(lán)色。每個(gè)通道占用2位十六進(jìn)制字符，總共8位十六進(jìn)制字符。

透明度百分比的Alpha值可以通過(guò)將百分比轉(zhuǎn)換為十六進(jìn)制表示。例如，透明度為50%對(duì)應(yīng)的Alpha值可以按如下方式計(jì)算：

1、將百分比轉(zhuǎn)換為0到255之間的值：

公式.png

2、將這個(gè)值轉(zhuǎn)換為十六進(jìn)制表示。
透明度百分比與對(duì)應(yīng)的Alpha值
0%：完全透明，對(duì)應(yīng)的Alpha值是00
1%：對(duì)應(yīng)的Alpha值是03
2%：對(duì)應(yīng)的Alpha值是05
3%：對(duì)應(yīng)的Alpha值是08
4%：對(duì)應(yīng)的Alpha值是0A
5%：對(duì)應(yīng)的Alpha值是0D
6%：對(duì)應(yīng)的Alpha值是0F
7%：對(duì)應(yīng)的Alpha值是12
8%：對(duì)應(yīng)的Alpha值是14
9%：對(duì)應(yīng)的Alpha值是17
10%：對(duì)應(yīng)的Alpha值是1A
11%：對(duì)應(yīng)的Alpha值是1C
12%：對(duì)應(yīng)的Alpha值是1F
13%：對(duì)應(yīng)的Alpha值是21
14%：對(duì)應(yīng)的Alpha值是24
15%：對(duì)應(yīng)的Alpha值是26
16%：對(duì)應(yīng)的Alpha值是29
17%：對(duì)應(yīng)的Alpha值是2B
18%：對(duì)應(yīng)的Alpha值是2E
19%：對(duì)應(yīng)的Alpha值是30
20%：對(duì)應(yīng)的Alpha值是33
21%：對(duì)應(yīng)的Alpha值是36
22%：對(duì)應(yīng)的Alpha值是38
23%：對(duì)應(yīng)的Alpha值是3B
24%：對(duì)應(yīng)的Alpha值是3D
25%：對(duì)應(yīng)的Alpha值是40
26%：對(duì)應(yīng)的Alpha值是42
27%：對(duì)應(yīng)的Alpha值是45
28%：對(duì)應(yīng)的Alpha值是47
29%：對(duì)應(yīng)的Alpha值是4A
30%：對(duì)應(yīng)的Alpha值是4D
31%：對(duì)應(yīng)的Alpha值是4F
32%：對(duì)應(yīng)的Alpha值是52
33%：對(duì)應(yīng)的Alpha值是54
34%：對(duì)應(yīng)的Alpha值是57
35%：對(duì)應(yīng)的Alpha值是59
36%：對(duì)應(yīng)的Alpha值是5C
37%：對(duì)應(yīng)的Alpha值是5E
38%：對(duì)應(yīng)的Alpha值是61
39%：對(duì)應(yīng)的Alpha值是63
40%：對(duì)應(yīng)的Alpha值是66
41%：對(duì)應(yīng)的Alpha值是69
42%：對(duì)應(yīng)的Alpha值是6B
43%：對(duì)應(yīng)的Alpha值是6E
44%：對(duì)應(yīng)的Alpha值是70
45%：對(duì)應(yīng)的Alpha值是73
46%：對(duì)應(yīng)的Alpha值是75
47%：對(duì)應(yīng)的Alpha值是78
48%：對(duì)應(yīng)的Alpha值是7A
49%：對(duì)應(yīng)的Alpha值是7D
50%：對(duì)應(yīng)的Alpha值是80
51%：對(duì)應(yīng)的Alpha值是82
52%：對(duì)應(yīng)的Alpha值是85
53%：對(duì)應(yīng)的Alpha值是87
54%：對(duì)應(yīng)的Alpha值是8A
55%：對(duì)應(yīng)的Alpha值是8C
56%：對(duì)應(yīng)的Alpha值是8F
57%：對(duì)應(yīng)的Alpha值是91
58%：對(duì)應(yīng)的Alpha值是94
59%：對(duì)應(yīng)的Alpha值是96
60%：對(duì)應(yīng)的Alpha值是99
61%：對(duì)應(yīng)的Alpha值是9B
62%：對(duì)應(yīng)的Alpha值是9E
63%：對(duì)應(yīng)的Alpha值是A0
64%：對(duì)應(yīng)的Alpha值是A3
65%：對(duì)應(yīng)的Alpha值是A6
66%：對(duì)應(yīng)的Alpha值是A8
67%：對(duì)應(yīng)的Alpha值是AB
68%：對(duì)應(yīng)的Alpha值是AD
69%：對(duì)應(yīng)的Alpha值是B0
70%：對(duì)應(yīng)的Alpha值是B3
71%：對(duì)應(yīng)的Alpha值是B5
72%：對(duì)應(yīng)的Alpha值是B8
73%：對(duì)應(yīng)的Alpha值是BA
74%：對(duì)應(yīng)的Alpha值是BD
75%：對(duì)應(yīng)的Alpha值是BF
76%：對(duì)應(yīng)的Alpha值是C2
77%：對(duì)應(yīng)的Alpha值是C4
78%：對(duì)應(yīng)的Alpha值是C7
79%：對(duì)應(yīng)的Alpha值是C9
80%：對(duì)應(yīng)的Alpha值是CC
81%：對(duì)應(yīng)的Alpha值是CF
82%：對(duì)應(yīng)的Alpha值是D1
83%：對(duì)應(yīng)的Alpha值是D4
84%：對(duì)應(yīng)的Alpha值是D6
85%：對(duì)應(yīng)的Alpha值是D9
86%：對(duì)應(yīng)的Alpha值是DB
87%：對(duì)應(yīng)的Alpha值是DE
88%：對(duì)應(yīng)的Alpha值是E0
89%：對(duì)應(yīng)的Alpha值是E3
90%：對(duì)應(yīng)的Alpha值是E6
91%：對(duì)應(yīng)的Alpha值是E8
92%：對(duì)應(yīng)的Alpha值是EB
93%：對(duì)應(yīng)的Alpha值是ED
94%：對(duì)應(yīng)的Alpha值是F0
95%：對(duì)應(yīng)的Alpha值是F2
96%：對(duì)應(yīng)的Alpha值是F5
97%：對(duì)應(yīng)的Alpha值是F7
98%：對(duì)應(yīng)的Alpha值是FA
99%：對(duì)應(yīng)的Alpha值是FC
100%：完全不透明，對(duì)應(yīng)的Alpha值是FF