1 files changed, 38 insertions, 0 deletions
diff --git a/internal/colors/precise.go b/internal/colors/precise.go
new file mode 100644
index 0000000..fafa104
--- /dev/null
+++ b/internal/colors/precise.go
@@ -0,0 +1,38 @@
+package colors
+
+import (
+	"fmt"
+	"math"
+	"strings"
+)
+
+type ColorSpace interface {
+	ToPrecise() PreciseColor
+	FromPrecise(PreciseColor) ColorSpace
+}
+
+// PreciseColor is a color with floating point values for red, green, and blue.
+// The extra precision minimizes rounding errors when converting between different
+// color spaces. It is used as an intermediate representation when converting between
+// different color spaces.
+type PreciseColor struct {
+	R, G, B float64
+}
+
+func (c PreciseColor) ToPrecise() PreciseColor {
+	return c
+}
+
+func (c PreciseColor) FromPrecise(p PreciseColor) ColorSpace {
+	return p
+}
+
+func ToHexString(cs ColorSpace) string {
+	p := cs.ToPrecise()
+
+	return strings.ToUpper(fmt.Sprintf("#%02x%02x%02x",
+		int(math.Round(p.R*255)),
+		int(math.Round(p.G*255)),
+		int(math.Round(p.B*255)),
+	))
+}