How to add a value to an RGB tuple?

Question

I want to make a colour brighter by adding an integer to each RGB value of the variable but im not sure how to do it.

black = (0,0,0)

for i in black:
   black[i] += 50

print(black)

The expected output is (50, 50, 50)

Tuples are immutable (can't be changed), so you'll need to replace the value with a new one and assign it to the name. i.e. `black = tuple(v+50 for v in black)` — of course you might not want to name it `black` anymore. `;¬)` — martineau, Mar 14 '20 at 18:28
What is the issue, exactly? Have you tried anything, done any research? Stack Overflow is not a free code writing service. See: [ask], [help/on-topic], https://meta.stackoverflow.com/questions/261592/how-much-research-effort-is-expected-of-stack-overflow-users. — AMC, Mar 14 '20 at 19:39
Does this answer your question? [Python: changing value in a tuple](https://stackoverflow.com/questions/11458239/python-changing-value-in-a-tuple) — AMC, Mar 14 '20 at 19:39

score 2 · Accepted Answer · answered Mar 14 '20 at 18:08

Tuples are immutable, you cannot change their values after they are created. Try creating a new tuple instead:

black = (0,0,0)

newcolor = (black[0] + 50, black[1] + 50, black[2] + 50)

print(newcolor)

Or with list comprehension:

black = (0,0,0)

newcolor = tuple(component + 50 for component in black)

print(newcolor)

Remember you can only max each component to 255 - use Saturation arithmetic to overcome this

score 0 · Answer 2 · answered Mar 14 '20 at 18:20

Tuples are immutable

If your code needs to change value of RGB dynamically, then preferred datatype is List

So use list instead:

black = [0,0,0]

for i in range(len(black)):
   black[i] += 50

print(black)
op:[50, 50, 50]

Note:If you use your code by just change tuple to list, Then you will get [150, 0, 0] instead [50, 50, 50], Because value of i will be 0 all 3 times, and for next run you will get runTime error

How to add a value to an RGB tuple?

2 Answers2

Tuples are immutable