Logo Questions Linux Laravel Mysql Ubuntu Git Menu
 

Understanding colors on Android (six characters)

People also ask

What color is 0xffff0000?

For instance, the color int representation of opaque red is 0xffff0000 .

How do you change the color of your text on Android?

Open your device's Settings app . Text and display. Select Color correction. Turn on Use color correction.

What Colour is the Android logo?

Android green is a shade of chartreuse or Caribbean green, defined by Google as the color of the "Android robot" logo for the Android operating system. It is defined to be RGB hex value #3DDC84 online and Pantone 7479 C in print.

How do I change the color of a hex opacity?

Using an alpha value to update a color's transparency will change the hex code format from #RRGGBB to #RRGGBBAA (where alpha is A ). The first six values (the red, green, and blue ones) remain the same. The AA value in #RRGGBBAA can range from the lowest value possible ( 00 ) to the highest value possible ( FF ).


Android uses hexadecimal ARGB values, which are formatted as #AARRGGBB. That first pair of letters, the AA, represent the alpha channel. You must convert your decimal opacity values to a hexadecimal value. Here are the steps:

Alpha Hex Value Process

  1. Take your opacity as a decimal value and multiply it by 255. So, if you have a block that is 50% opaque the decimal value would be .5. For example: .5 x 255 = 127.5
  2. The fraction won't convert to hexadecimal, so you must round your number up or down to the nearest whole number. For example: 127.5 rounds up to 128; 55.25 rounds down to 55.
  3. Enter your decimal value in a decimal-to-hexadecimal converter, like http://www.binaryhexconverter.com/decimal-to-hex-converter, and convert your values.
  4. If you only get back a single value, prefix it with a zero. For example, if you're trying to get 5% opacity and you're going through this process, you'll end up with the hexadecimal value of D. Add a zero in front of it so it appears as 0D.

That's how you find the alpha channel value. I've taken the liberty to put together a list of values for you. Enjoy!

Hex Opacity Values

  • 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

Going off the answer from @BlondeFurious, here is some Java code to get each hexadecimal value from 100% to 0% alpha:

for (double i = 1; i >= 0; i -= 0.01) {
    i = Math.round(i * 100) / 100.0d;
    int alpha = (int) Math.round(i * 255);
    String hex = Integer.toHexString(alpha).toUpperCase();
    if (hex.length() == 1)
        hex = "0" + hex;
    int percent = (int) (i * 100);
    System.out.println(String.format("%d%% — %s", percent, hex));
}

Output:

100% — FF
99% — FC
98% — FA
97% — F7
96% — F5
95% — F2
94% — F0
93% — ED
92% — EB
91% — E8
90% — E6
89% — E3
88% — E0
87% — DE
86% — DB
85% — D9
84% — D6
83% — D4
82% — D1
81% — CF
80% — CC
79% — C9
78% — C7
77% — C4
76% — C2
75% — BF
74% — BD
73% — BA
72% — B8
71% — B5
70% — B3
69% — B0
68% — AD
67% — AB
66% — A8
65% — A6
64% — A3
63% — A1
62% — 9E
61% — 9C
60% — 99
59% — 96
58% — 94
57% — 91
56% — 8F
55% — 8C
54% — 8A
53% — 87
52% — 85
51% — 82
50% — 80
49% — 7D
48% — 7A
47% — 78
46% — 75
45% — 73
44% — 70
43% — 6E
42% — 6B
41% — 69
40% — 66
39% — 63
38% — 61
37% — 5E
36% — 5C
35% — 59
34% — 57
33% — 54
32% — 52
31% — 4F
30% — 4D
29% — 4A
28% — 47
27% — 45
26% — 42
25% — 40
24% — 3D
23% — 3B
22% — 38
21% — 36
20% — 33
19% — 30
18% — 2E
17% — 2B
16% — 29
15% — 26
14% — 24
13% — 21
12% — 1F
11% — 1C
10% — 1A
9% — 17
8% — 14
7% — 12
6% — 0F
5% — 0D
4% — 0A
3% — 08
2% — 05
1% — 03
0% — 00

A JavaScript version is below:

var text = document.getElementById('text');
for (var i = 1; i >= 0; i -= 0.01) {
    i = Math.round(i * 100) / 100;
    var alpha = Math.round(i * 255);
    var hex = (alpha + 0x10000).toString(16).substr(-2).toUpperCase();
    var perc = Math.round(i * 100);
    text.innerHTML += perc + "% — " + hex + " (" + alpha + ")</br>";
}
<div id="text"></div>

You can also just Google "number to hex" where 'number' is any value between 0 and 255.


If you provide 6 hex digits, that means RGB (2 hex digits for each value of red, green and blue).

If you provide 8 hex digits, it's an ARGB (2 hex digits for each value of alpha, red, green and blue respectively).

So by removing the final 55 you're changing from A=B4, R=55, G=55, B=55 (a mostly transparent grey), to R=B4, G=55, B=55 (a fully-non-transparent dusky pinky).

See the "Color" documentation for the supported formats.


Android Material Design

These are the conversions for setting the text color opacity levels.

  • 100%: FF
  • 87%: DE
  • 70%: B3
  • 54%: 8A
  • 50%: 80
  • 38%: 61
  • 12%: 1F

Dark text on light backgrounds

enter image description here

  • Primary text: DE000000
  • Secondary text: 8A000000
  • Disabled text, hint text, and icons: 61000000
  • Dividers: 1F000000

White text on dark backgrounds

enter image description here

  • Primary text: FFFFFFFF
  • Secondary text: B3FFFFFF
  • Disabled text, hint text, and icons: 80FFFFFF
  • Dividers: 1FFFFFFF

See also

  • Look up any percentage here.

On Android, colors are can be specified as RGB or ARGB.

http://en.wikipedia.org/wiki/ARGB

In RGB you have two characters for every color (red, green, blue), and in ARGB you have two additional chars for the alpha channel.

So, if you have 8 characters, it's ARGB, with the first two characters specifying the alpha channel. If you remove the leading two characters it's only RGB (solid colors, no alpha/transparency). If you want to specify a color in your Java source code, you have to use:

int Color.argb (int alpha, int red, int green, int blue)

alpha  Alpha component [0..255] of the color
red    Red component [0..255] of the color
green  Green component [0..255] of the color
blue   Blue component [0..255] of the color

Reference: argb