Hex transparency in colors

2018-06-04 17:26:45

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Understanding colors on Android (six characters) 6 answers

Here's a correct table of percentages to hex values. Eg for 50% white you'd use #80FFFFFF.

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

(source)

The problem can be solved generically by a cross multiplication

How to calculate?

percentage = (value in decimal ) / 255 * 100

What is the % transparency of B4 ? B4 in hex is 180.

So 180 / 255 * 100 = 70,5 %

decimal = percentage / 100 * 255

What is the hex of 80% ?

80/100*255 = 204 . The hex value of 204 is CC

I prefer to teach how to find the solution rather than handing table

Give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime

Color hexadecimal notation is like following: #AARRGGBB

A : alpha

R : red

G : green

B : blue

You should first look at how hexadecimal works. You can write at most FF.

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