Android color transparency conversion, actual effect

transparency

Transparency is divided into 256 levels (0-255), and it is expressed as (00-ff) in hexadecimal on the computer.
Transparency is 0 level, opaque is 255 level, if 50% transparent is 127 level (of course, half of 256 is 128, but because it starts from 0, it is actually 127).
Transparency and opacity are two concepts, and they add up to 1, or 100%.
The transparency alpha in ARGB means opacity.
ARGB represents transparency (alpha), red (red), green (green), and blue (blue) in turn. Take the color value #FF99CC00 as an example, where FF is the transparency, 99 is the red value, CC is the green value, and 00 is the blue value.

Corresponding value

transparency	Hexadecimal
100%	FF
95%	F2
90%	E6
85%	D9
80%	CC
75%	BF
70%	B3
65%	A6
60%	99
55%	8C
50%	80
45%	73
40%	66
35%	59
30%	4D
25%	40
20%	33
15%	26
10%	1A
5%	0D
0%	00

actual effect

Code value

	<--黑色-->
 	<color name="black_100">#FF000000</color>
    <color name="black_95">#F2000000</color>
    <color name="black_90">#E6000000</color>
    <color name="black_85">#D9000000</color>
    <color name="black_80">#CC000000</color>
    <color name="black_75">#BF000000</color>
    <color name="black_70">#B3000000</color>
    <color name="black_65">#A6000000</color>
    <color name="black_60">#99000000</color>
    <color name="black_55">#8C000000</color>
    <color name="black_50">#80000000</color>
    <color name="black_45">#73000000</color>
    <color name="black_40">#66000000</color>
    <color name="black_35">#59000000</color>
    <color name="black_30">#4D000000</color>
    <color name="black_25">#40000000</color>
    <color name="black_20">#33000000</color>
    <color name="black_15">#26000000</color>
    <color name="black_10">#1A000000</color>
    <color name="black_5">#1A000000</color>
    <color name="black_0">#00000000</color>
    
    <--红色-->
    <color name="red_100">#FFD81B60</color>
    <color name="red_95">#F2D81B60</color>
    <color name="red_90">#E6D81B60</color>
    <color name="red_85">#D9D81B60</color>
    <color name="red_80">#CCD81B60</color>
    <color name="red_75">#BFD81B60</color>
    <color name="red_70">#B3D81B60</color>
    <color name="red_65">#A6D81B60</color>
    <color name="red_60">#99D81B60</color>
    <color name="red_55">#8CD81B60</color>
    <color name="red_50">#80D81B60</color>
    <color name="red_45">#73D81B60</color>
    <color name="red_40">#66D81B60</color>
    <color name="red_35">#59D81B60</color>
    <color name="red_30">#4DD81B60</color>
    <color name="red_25">#40D81B60</color>
    <color name="red_20">#33D81B60</color>
    <color name="red_15">#26D81B60</color>
    <color name="red_10">#1AD81B60</color>
    <color name="red_5">#1AD81B60</color>
    <color name="red_0">#00D81B60</color>