diff --git a/color.go b/color.go
deleted file mode 100644
index 4b41af3..0000000
--- a/color.go
+++ /dev/null
@@ -1,97 +0,0 @@
-package pixel
-
-import "image/color"
-
-// RGBA represents an alpha-premultiplied RGBA color with components within range [0, 1].
-//
-// The difference between color.RGBA is that the value range is [0, 1] and the values are floats.
-type RGBA struct {
-	R, G, B, A float64
-}
-
-// RGB returns a fully opaque RGBA color with the given RGB values.
-//
-// A common way to construct a transparent color is to create one with RGB constructor, then
-// multiply it by a color obtained from the Alpha constructor.
-func RGB(r, g, b float64) RGBA {
-	return RGBA{r, g, b, 1}
-}
-
-// Alpha returns a white RGBA color with the given alpha component.
-func Alpha(a float64) RGBA {
-	return RGBA{a, a, a, a}
-}
-
-// Add adds color d to color c component-wise and returns the result (the components are not
-// clamped).
-func (c RGBA) Add(d RGBA) RGBA {
-	return RGBA{
-		R: c.R + d.R,
-		G: c.G + d.G,
-		B: c.B + d.B,
-		A: c.A + d.A,
-	}
-}
-
-// Sub subtracts color d from color c component-wise and returns the result (the components
-// are not clamped).
-func (c RGBA) Sub(d RGBA) RGBA {
-	return RGBA{
-		R: c.R - d.R,
-		G: c.G - d.G,
-		B: c.B - d.B,
-		A: c.A - d.A,
-	}
-}
-
-// Mul multiplies color c by color d component-wise (the components are not clamped).
-func (c RGBA) Mul(d RGBA) RGBA {
-	return RGBA{
-		R: c.R * d.R,
-		G: c.G * d.G,
-		B: c.B * d.B,
-		A: c.A * d.A,
-	}
-}
-
-// Scaled multiplies each component of color c by scale and returns the result (the components
-// are not clamped).
-func (c RGBA) Scaled(scale float64) RGBA {
-	return RGBA{
-		R: c.R * scale,
-		G: c.G * scale,
-		B: c.B * scale,
-		A: c.A * scale,
-	}
-}
-
-// RGBA returns alpha-premultiplied red, green, blue and alpha components of the RGBA color.
-func (c RGBA) RGBA() (r, g, b, a uint32) {
-	r = uint32(0xffff * c.R)
-	g = uint32(0xffff * c.G)
-	b = uint32(0xffff * c.B)
-	a = uint32(0xffff * c.A)
-	return
-}
-
-// ToRGBA converts a color to RGBA format. Using this function is preferred to using RGBAModel, for
-// performance (using RGBAModel introduces additional unnecessary allocations).
-func ToRGBA(c color.Color) RGBA {
-	if c, ok := c.(RGBA); ok {
-		return c
-	}
-	r, g, b, a := c.RGBA()
-	return RGBA{
-		float64(r) / 0xffff,
-		float64(g) / 0xffff,
-		float64(b) / 0xffff,
-		float64(a) / 0xffff,
-	}
-}
-
-// RGBAModel converts colors to RGBA format.
-var RGBAModel = color.ModelFunc(rgbaModel)
-
-func rgbaModel(c color.Color) color.Color {
-	return ToRGBA(c)
-}