diff --git a/include/gfx/rgba.hpp b/include/gfx/rgba.hpp
index 3d5e1a45..b86968b9 100644
--- a/include/gfx/rgba.hpp
+++ b/include/gfx/rgba.hpp
@@ -18,7 +18,10 @@ struct Rgba {
 	    : red(rgba >> 24), green(rgba >> 16), blue(rgba >> 8), alpha(rgba) {}
 
 	static constexpr Rgba fromCGBColor(uint16_t color) {
-		constexpr auto _5to8 = [](uint8_t c) -> uint8_t { return ((c & 0b11111) * 255 + 15) / 31; };
+		constexpr auto _5to8 = [](uint8_t channel) -> uint8_t {
+			channel &= 0b11111; // For caller's convenience
+			return channel << 3 | channel >> 2;
+		};
 		return {
 		    _5to8(color),
 		    _5to8(color >> 5),
diff --git a/man/rgbasm-old.5 b/man/rgbasm-old.5
index a7b390c3..094c4f31 100644
--- a/man/rgbasm-old.5
+++ b/man/rgbasm-old.5
@@ -461,24 +461,6 @@ Previously we had
 .Pp
 Instead, now we have
 .Ql p ** q ** r == p ** (q ** r) .
-.Ss 8-bit and 5-bit color conversion
-Changed in 1.0.0.
-.Pp
-RGBGFX takes 8-bit RGB colors as its PNG input, and outputs 5-bit GBC colors.
-Its
-.Ql -r/--reverse
-mode does the opposite 5-bit to 8-bit conversion.
-Instead of the previous inaccurate conversions, we now do accurate rounding to the nearest equivalent.
-.Pp
-Previously to convert an 8-bit color channel to 5-bit, we truncated it as
-.Ql c >> 3 ;
-and to reverse a 5-bit color channel to 8-bit, we extended it as
-.Ql (c << 3) | (c >> 2) .
-.Pp
-Instead, now we round 8-bit to 5-bit as
-.Ql (c * 31 + 127) / 255 ,
-and round 5-bit to 8-bit as
-.Ql (c * 255 + 15) / 31 .
 .Sh BUGS
 These are misfeatures that may have been possible by mistake.
 They do not get deprecated, just fixed.
diff --git a/src/gfx/rgba.cpp b/src/gfx/rgba.cpp
index e3f54cc1..ef37eace 100644
--- a/src/gfx/rgba.cpp
+++ b/src/gfx/rgba.cpp
@@ -50,10 +50,9 @@ uint16_t Rgba::cgbColor() const {
 		g = reverse_curve[g];
 		b = reverse_curve[b];
 	} else {
-		constexpr auto _8to5 = [](uint8_t c) -> uint8_t { return (c * 31 + 127) / 255; };
-		r = _8to5(r);
-		g = _8to5(g);
-		b = _8to5(b);
+		r >>= 3;
+		g >>= 3;
+		b >>= 3;
 	}
 	return r | g << 5 | b << 10;
 }
diff --git a/test/gfx/alpha_embedded.err b/test/gfx/alpha_embedded.err
index d5ecfd17..8efb02a9 100644
--- a/test/gfx/alpha_embedded.err
+++ b/test/gfx/alpha_embedded.err
@@ -1,4 +1,4 @@
-error: Failed to fit tile colors [$1527, $15cc, $1a93] in specified palettes
+error: Failed to fit tile colors [$1527, $15cc, $1ab4] in specified palettes
 note: The following palette was specified:
-        [$1a93, $15cc]
+        [$1ab4, $15cc]
 Conversion aborted after 1 error
diff --git a/test/gfx/at-file-ref.err b/test/gfx/at-file-ref.err
index 2de5a93f..f480fa6e 100644
--- a/test/gfx/at-file-ref.err
+++ b/test/gfx/at-file-ref.err
@@ -1,4 +1,4 @@
-error: Failed to fit tile colors [$688b, $7f55, $7fff] in specified palettes
+error: Failed to fit tile colors [$6c8a, $7f55, $7fff] in specified palettes
 note: The following palettes were specified:
         [$5f77, $213d, $41a6, $40ee]
         [$3f65, $36b3, $262a, $50b0]
diff --git a/test/gfx/bad_manual_pals.err b/test/gfx/bad_manual_pals.err
index 8817b39c..0815a1ff 100644
--- a/test/gfx/bad_manual_pals.err
+++ b/test/gfx/bad_manual_pals.err
@@ -1,5 +1,5 @@
-error: Failed to fit tile colors [$688b, $7f55, $7fff] in specified palettes
+error: Failed to fit tile colors [$6c8a, $7f55, $7fff] in specified palettes
 note: The following palettes were specified:
         [$7fff, $7f55]
-        [$7fff, $688b]
+        [$7fff, $6c8a]
 Conversion aborted after 1 error
diff --git a/test/gfx/base_ids.out.pal b/test/gfx/base_ids.out.pal
index e431fa47..6baa19cf 100644
Binary files a/test/gfx/base_ids.out.pal and b/test/gfx/base_ids.out.pal differ
diff --git a/test/gfx/bg_fuse.err b/test/gfx/bg_fuse.err
index 47d61d0f..ecbbd45c 100644
--- a/test/gfx/bg_fuse.err
+++ b/test/gfx/bg_fuse.err
@@ -1,3 +1,3 @@
-warning: Fusing colors #a9bacbff and #aabbccff into Game Boy color $66f5 [first seen at x: 1, y: 1]
+warning: Fusing colors #a9b9c9ff and #aabbccff into Game Boy color $66f5 [first seen at x: 1, y: 1]
 FATAL: Tile (0, 0) contains the background color (#aabbccff)!
 Conversion aborted after 1 error
diff --git a/test/gfx/bg_fuse.png b/test/gfx/bg_fuse.png
index e48fb6e2..2fee135f 100644
Binary files a/test/gfx/bg_fuse.png and b/test/gfx/bg_fuse.png differ
diff --git a/test/gfx/empty_lines.out.pal b/test/gfx/empty_lines.out.pal
index 61337e6c..ca034125 100644
--- a/test/gfx/empty_lines.out.pal
+++ b/test/gfx/empty_lines.out.pal
@@ -1 +1 @@
-‹hU˙˙˙
\ No newline at end of file
+ŠlU˙˙˙
\ No newline at end of file
diff --git a/test/gfx/full_aco.out.pal b/test/gfx/full_aco.out.pal
index 45edb6b8..820ff240 100644
Binary files a/test/gfx/full_aco.out.pal and b/test/gfx/full_aco.out.pal differ
diff --git a/test/gfx/full_aco.png b/test/gfx/full_aco.png
index a7b2c255..de5a5849 100644
Binary files a/test/gfx/full_aco.png and b/test/gfx/full_aco.png differ
diff --git a/test/gfx/full_act.out.pal b/test/gfx/full_act.out.pal
index 45edb6b8..820ff240 100644
Binary files a/test/gfx/full_act.out.pal and b/test/gfx/full_act.out.pal differ
diff --git a/test/gfx/full_act.png b/test/gfx/full_act.png
index a7b2c255..de5a5849 100644
Binary files a/test/gfx/full_act.png and b/test/gfx/full_act.png differ
diff --git a/test/gfx/full_gpl.out.pal b/test/gfx/full_gpl.out.pal
index 45edb6b8..820ff240 100644
Binary files a/test/gfx/full_gpl.out.pal and b/test/gfx/full_gpl.out.pal differ
diff --git a/test/gfx/full_gpl.png b/test/gfx/full_gpl.png
index a7b2c255..de5a5849 100644
Binary files a/test/gfx/full_gpl.png and b/test/gfx/full_gpl.png differ
diff --git a/test/gfx/full_psp.out.pal b/test/gfx/full_psp.out.pal
index 45edb6b8..820ff240 100644
Binary files a/test/gfx/full_psp.out.pal and b/test/gfx/full_psp.out.pal differ
diff --git a/test/gfx/full_psp.png b/test/gfx/full_psp.png
index a7b2c255..de5a5849 100644
Binary files a/test/gfx/full_psp.png and b/test/gfx/full_psp.png differ
diff --git a/test/gfx/interlaced.out.pal b/test/gfx/interlaced.out.pal
index 557777fc..8cdc1c73 100644
Binary files a/test/gfx/interlaced.out.pal and b/test/gfx/interlaced.out.pal differ
diff --git a/test/gfx/randtilegen.cpp b/test/gfx/randtilegen.cpp
index e4965abc..089de824 100644
--- a/test/gfx/randtilegen.cpp
+++ b/test/gfx/randtilegen.cpp
@@ -144,7 +144,7 @@ static void generate_palettes(uint16_t palettes[/* 60 */][4]) {
  * Expand a 5-bit color component to 8 bits with minimal bias
  */
 static uint8_t _5to8(uint8_t five) {
-	return (five * 255 + 15) / 31;
+	return five << 3 | five >> 2;
 }
 
 // Can't mark as `const`, as the array type is otherwise not compatible (augh)