search

creativecommons / creativecommons.org

Legacy legal code translations and general support issues
MIT License
155 stars 205 forks source link

[Bug] Trademark Policy uses term "contrast ratio" without defining it #1217

Closed SamB closed 1 month ago

SamB commented 3 years ago

Description

The Trademark Policy says:

You are not authorized to use any modified versions of our trademarks, except that you may use a different color for the CC logo and its background so long as the two colors chosen have a contrast ratio of at least 3:1.

But what ratio do you mean? For web use, do we …

  1. … just add up the 8-bit RGB components of each color and then divide?
  2. … realize that the amount of illumination corresponding to those RGB components isn't actually linear, but something much closer to sRGB, so convert to CIEXYZ color space?
  3. … remember that human perception isn't linear, so convert to e.g. CIELAB color space instead?

… and what about viewing conditions?

I suppose we could try to use the definition at https://www.w3.org/TR/WCAG21/#dfn-contrast-ratio, but see https://github.com/w3c/wcag/issues/695 for why that might not be the best plan.

And what about usage in print?

In conclusion: (╯°□°）╯︵ ┻━┻. It might be better to forget about defining things for now, and just say something like "but please choose colors with plenty of contrast".

Resolution

Natchaphonwongplianphan commented 1 year ago

You guys will never understand people like me. I have a life, a family, a body and mind. All these years, you and me are like 1 bots even though the development of the system is proven by technology. how I was born in Thailand Lord of the land, you have created a contracted media channel that is accepted as the first in the world. He made and placed a hidden secret that......can't tell. Throughout the past 11-12 years Loyalty has nothing to do with it. I began to run out of potential and angry with the group of people who possession of the rights, with my rights. as a secondary mouse until I began to end with a strong military force Security orders, rights in various contracts, I have the right. But you don't have the right to treat me unhelScreenshot_20230518_210705.jpg

Natchaphonwongplianphan commented 1 year ago

You guys will never understand people like me. I have a life, a family, a body and mind. All these years, you and me are like 1 bots even though the development of the system is proven by technology. how I was born in Thailand Lord of the land, you have created a contracted media channel that is accepted as the first in the world. He made and placed a hidden secret that......can't tell. Throughout the past 11-12 years Loyalty has nothing to do with it. I began to run out of potential and angry with the group of people who possession of the rights, with my rights. as a secondary mouse until I began to end with a strong military force Security orders, rights in various contracts, I have the right. But you don't have the right to treat me unhelpfully like this. or let me Fight against cyber defenses as human beings, with only a few claimants. Some places have been modified by government agencies to change the route of the system. They say that I'm thin, crippled, thin, childish, but that reality doesn't apply to this world. Which I supported to spread to spread each other in the progress of the problems of various countries that have a bachelor's demonic, protection that I protected, investing, receiving the rights that I am in the technology system that you never know that I have identity They have a different understanding of each other, or someone has claimed the benefits that I have not yet given to anyone to act on my behalf. But I tried to cry out for help.

TimidRobot commented 1 month ago

I propose:

You are not authorized to use any modified versions of our trademarks, except that you may use a different color for the CC logo and its background so long as the two colors chosen have enough contrast to be accessible and easily readable.

TimidRobot commented 1 month ago

Recommendation communicated to the Legal team for consideration in their next policy update.