From 6c6efe2f7aff534c8eb5d20fdfb8ec2586a545b1 Mon Sep 17 00:00:00 2001
From: NetterSilver <133535268+Silvertree2010@users.noreply.github.com>
Date: Thu, 29 Oct 2026 15:43:45 +0000
Subject: [PATCH] Fix "-0" in Name with Color Value for slightly negative RGB

Found while testing crates/color/src/swatch.rs:94-101 (value_name)

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
---
 crates/color/src/swatch.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/crates/color/src/swatch.rs b/crates/color/src/swatch.rs
index e47bf4eef..d27a76428 100644
--- a/crates/color/src/swatch.rs
+++ b/crates/color/src/swatch.rs
@@ -96,7 +96,9 @@ pub fn value_name(c: Color) -> String {
         Color::Cmyk { c, m, y, k } => cmyk_name(c, m, y, k),
         other => {
             let [r, g, b] = other.to_rgb();
-            format!("R={} G={} B={}", (r * 255.0).round(), (g * 255.0).round(), (b * 255.0).round())
+            // `+ 0.0` turns -0.0 into 0.0 so it prints as "0", not "-0".
+            let p = |v: f32| (v * 255.0).round() + 0.0;
+            format!("R={} G={} B={}", p(r), p(g), p(b))
         }
     }
 }
@@ -172,6 +174,11 @@ pub fn default_swatches() -> Vec<Swatch> {
 mod tests {
     use super::*;
 
+    #[test]
+    fn value_name_has_no_negative_zero() {
+        assert_eq!(value_name(Color::rgb(-0.001, 0.5, 1.0)), "R=0 G=128 B=255");
+    }
+
     #[test]
     fn defaults_start_with_specials() {
         let s = default_swatches();