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fix: Improve image captcha contrast for dark mode #36265

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Merged
silverwind merged 4 commits into from
Jan 24, 2026
Merged

fix: Improve image captcha contrast for dark mode #36265

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3921fa3
Fix image captcha low contrast in dark mode
majiayu000 Dec 30, 2025
d92b780
Merge branch 'main' into fix-36255-image-captcha-results-in-low-c-123…
silverwind Jan 24, 2026
3cb78a7
remove dark blue
silverwind Jan 24, 2026
d9c0ee7
Merge branch 'main' into fix-36255-image-captcha-results-in-low-c-123…
GiteaBot Jan 24, 2026
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10 changes: 10 additions & 0 deletions services/context/captcha.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ package context

import (
"fmt"
"image/color"
"sync"

"code.gitea.io/gitea/modules/cache"
Expand All @@ -29,6 +30,15 @@ func GetImageCaptcha() *captcha.Captcha {
imageCaptchaOnce.Do(func() {
cpt = captcha.NewCaptcha(captcha.Options{
SubURL: setting.AppSubURL,
// Use a color palette with high contrast colors suitable for both light and dark modes
// These colors provide good visibility and readability in both themes
ColorPalette: color.Palette{
color.RGBA{R: 234, G: 67, B: 53, A: 255}, // Bright red
color.RGBA{R: 66, G: 133, B: 244, A: 255}, // Medium blue
color.RGBA{R: 52, G: 168, B: 83, A: 255}, // Green
color.RGBA{R: 251, G: 188, B: 5, A: 255}, // Yellow/gold
color.RGBA{R: 171, G: 71, B: 188, A: 255}, // Purple
},
})
cpt.Store = cache.GetCache().ChiCache()
})
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