diff --git a/libs/gfx/include/psemek/gfx/color.hpp b/libs/gfx/include/psemek/gfx/color.hpp
index cd82c58d..2fa5e53a 100644
--- a/libs/gfx/include/psemek/gfx/color.hpp
+++ b/libs/gfx/include/psemek/gfx/color.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <psemek/geom/vector.hpp>
+#include <psemek/geom/interval.hpp>
 
 #include <cstdint>
 
@@ -10,4 +11,22 @@ namespace psemek::gfx
 	using color_rgb = geom::vector<std::uint8_t, 3>;
 	using color_rgba = geom::vector<std::uint8_t, 4>;
 
+	template <std::size_t N>
+	auto to_colorf(geom::vector<std::uint8_t, N> const & c)
+	{
+		geom::vector<float, N> r;
+		for (std::size_t i = 0; i < N; ++i)
+			r[i] = c[i] / 255.f;
+		return r;
+	}
+
+	template <std::size_t N>
+	auto to_coloru8(geom::vector<float, N> const & c)
+	{
+		geom::vector<std::uint8_t, N> r;
+		for (std::size_t i = 0; i < N; ++i)
+			r[i] = static_cast<std::uint8_t>(std::round(geom::clamp(c[i] * 255.f, {0.f, 255.f})));
+		return r;
+	}
+
 }