Does Complement Hex upload my file or text to Tool-You servers?

No. Complement Hex runs in this browser tab. Files stay on the device. Limit note: Needs a valid hex color.

Should I use Hex Luminance instead of Complement Hex?

Use Complement Hex when you need Complement color with HSL. Use Hex Luminance when you need Relative luminance with light/dark tip. They share a category (Design) but not the same job.

Complement Hex

Complement color with HSL.

Rotate hue +180° for a complementary hex color. Shows H/S/L so design pairs stay intentional instead of guessed.

What Complement Hex does

Rotate hue +180° for a complementary hex color. Shows H/S/L so design pairs stay intentional instead of guessed.

Complement Hex sits in the Design group on purpose. It is not Hex Luminance (Relative luminance with light/dark tip.) and not Palette Generator (Build a color palette from a seed.). Choose this page when you need Complement color with HSL. If you stretch Complement Hex into a neighbor’s job, the result will look wrong even though the site chrome looks the same.

How to use Complement Hex

Use Complement Hex for this design job (design · complement hex). Hex Luminance is adjacent (Relative luminance with light/dark tip.) but not the same.
Add the file type Complement Hex accepts. Hint from the path: design · complement hex. Complement color with HSL.
Set only the options that match Complement Hex. Neighbor Palette Generator does something else (Build a color palette from a seed.). Tool note: Rotate hue +180° for a complementary hex color. Shows H/S/L so design pairs stay intentional instead of guessed.
Run Complement Hex in this tab. Browser memory still applies: Needs a valid hex color.
Download or copy the result from Complement Hex. If it is the wrong job, open Hex Luminance instead.

When not to use Complement Hex

Skip Complement Hex when a neighbor tool matches better — start with Hex Luminance or Palette Generator — or when the description already warns the job will fail. In the tool’s own words: Rotate hue +180° for a complementary hex color. Shows H/S/L so design pairs stay intentional instead of guessed.

Questions about Complement Hex

What does Complement Hex do that other Design pages on this site do not?: Rotate hue +180° for a complementary hex color. Shows H/S/L so design pairs stay intentional instead of guessed. Short version: Complement color with HSL.
Does Complement Hex upload my file or text to Tool-You servers?: No. Complement Hex runs in this browser tab. Files stay on the device. Limit note: Needs a valid hex color.
Should I use Hex Luminance instead of Complement Hex?: Use Complement Hex when you need Complement color with HSL. Use Hex Luminance when you need Relative luminance with light/dark tip. They share a category (Design) but not the same job.
What are the limits of Complement Hex?: Needs a valid hex color. Also: Rotate hue +180° for a complementary hex color. Shows H/S/L so design pairs stay intentional instead of guessed.