diff --git a/README.md b/README.md
index e69de29..298fa60 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1 @@
+# aluminum
diff --git a/aluminum/plugin.go b/aluminum/plugin.go
new file mode 100644
index 0000000..d6ce361
--- /dev/null
+++ b/aluminum/plugin.go
@@ -0,0 +1,17 @@
+// Plugin sapphire provides the Aluminum theme as a plugin.
+package main
+
+import "git.tebibyte.media/tomo/aluminum"
+import "git.tebibyte.media/tomo/tomo/theme"
+
+func init () {
+	theme.SetTheme(aluminum.Theme { })
+}
+
+func Name () string {
+	return "Aluminum"
+}
+
+func Description () string {
+	return "A shiny blue and metallic theme."
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..a0ab2b9
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,8 @@
+module git.tebibyte.media/tomo/aluminum
+
+go 1.20
+
+require (
+	git.tebibyte.media/tomo/tomo v0.23.0
+	golang.org/x/image v0.11.0
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..5e4ffa0
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,35 @@
+git.tebibyte.media/tomo/tomo v0.23.0 h1:OZwI4oLKMP7JqFc98VxBoRxwjL+W9NyTQZLB/m1BvaA=
+git.tebibyte.media/tomo/tomo v0.23.0/go.mod h1:C9EzepS9wjkTJjnZaPBh22YvVPyA4hbBAJVU20Rdmps=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/image v0.11.0 h1:ds2RoQvBvYTiJkwpSFDwCcDFNX7DqjL2WsUgTNk0Ooo=
+golang.org/x/image v0.11.0/go.mod h1:bglhjqbqVuEb9e9+eNR45Jfu7D+T4Qan+NhQk8Ck2P8=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.12.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/theme.go b/theme.go
new file mode 100644
index 0000000..49c23ed
--- /dev/null
+++ b/theme.go
@@ -0,0 +1,178 @@
+package aluminum
+
+import "image"
+import "image/color"
+import "git.tebibyte.media/tomo/tomo"
+import "golang.org/x/image/font/basicfont"
+import "git.tebibyte.media/tomo/tomo/theme"
+import "git.tebibyte.media/tomo/tomo/input"
+import "git.tebibyte.media/tomo/tomo/event"
+
+func hex (color uint32) (c color.RGBA) {
+	c.A = uint8(color)
+	c.B = uint8(color >>  8)
+	c.G = uint8(color >> 16)
+	c.R = uint8(color >> 24)
+	return
+}
+
+func border (top, right, bottom, left uint32, width ...int) tomo.Border {
+	return tomo.Border {
+		Width: tomo.I(width...),
+		Color: [4]color.Color {
+			hex(top),    hex(right),
+			hex(bottom), hex(left),
+		},
+	}
+}
+
+var engravedBorder = border(0xc3c3c5FF, 0xe3e3e3FF, 0xe9e9e9ff, 0xc2c2c2ff, 1)
+var gapBorder      = border(0x697c7cFF, 0x566767FF, 0x566767ff, 0x697c7cff, 1)
+var focusedBorder  = border(0x5f8bc4FF, 0x5f8bc4FF, 0x5f8bc4ff, 0x5f8bc4ff, 1)
+var buttonBorder   = border(0xf9fafcFF, 0xc2c8d3FF, 0xa4afc0ff, 0xf5f6f8ff, 1)
+var sunkenShadow   = border(0xa4afc0FF, 0xa4afc0FF, 0xa4afc0ff, 0xa4afc0ff, 1, 0, 0, 1)
+var outerShadow    = border(0xa4afc0FF, 0xa4afc0FF, 0xa4afc0ff, 0xa4afc0ff, 0, 1, 1, 0)
+
+var buttonColor        = hex(0xe9eaeaFF)
+var buttonColorPressed = hex(0xe3e4e4FF)
+var buttonColorFocused = hex(0xe4e6e8FF)
+var dotColor           = hex(0xa4c0e4FF)
+var inputColor         = hex(0xe3e4e4FF)
+var textColor          = hex(0x000000FF)
+var backgroundColor    = hex(0xd6d6d6FF)
+var gutterColor        = hex(0xbfc6d1FF)
+
+type Theme struct { }
+
+func (Theme) RGBA (id theme.Color) (r, g, b, a uint32) {
+	switch id {
+	case theme.ColorBackground: return backgroundColor  .RGBA()
+	case theme.ColorForeground: return textColor        .RGBA()
+	case theme.ColorRaised:     return buttonColor      .RGBA()
+	case theme.ColorSunken:     return inputColor       .RGBA()
+	case theme.ColorAccent:     return hex(0x5f8bc4FF)  .RGBA()
+	default:                    return color.Transparent.RGBA()
+	}
+}
+
+func (Theme) Apply (object tomo.Object, role theme.Role) event.Cookie {
+	box := object.GetBox()
+	box.SetColor(backgroundColor)
+
+	if textBox, ok := box.(tomo.TextBox); ok {
+		textBox.SetDotColor(dotColor)
+		textBox.SetTextColor(textColor)
+		textBox.SetFace(basicfont.Face7x13)
+	}
+	
+	if containerBox, ok := box.(tomo.ContainerBox); ok {
+		containerBox.SetGap(image.Pt(8, 8))
+	}
+	
+	switch role.Object {
+	case "Button":
+		mouseDown := false
+
+		updateStyle := func () {
+			border := []tomo.Border {
+				engravedBorder,
+				gapBorder,
+				buttonBorder,
+			}
+			
+			box.SetColor(buttonColor)
+			box.SetPadding(tomo.I(4, 8))
+			
+			if box.Focused() {
+				box.SetColor(buttonColorFocused)
+				border[1] = focusedBorder
+			}
+			if mouseDown {
+				box.SetColor(buttonColorPressed)
+				border[2] = sunkenShadow
+				box.SetPadding(tomo.I(5, 8, 4, 9))
+			}
+			box.SetBorder(border...)
+		}
+		updateStyle()
+		return event.MultiCookie (
+			box.OnMouseDown(func (button input.Button) {
+				if button != input.ButtonLeft { return }
+				mouseDown = true
+				updateStyle()
+			}),
+			box.OnMouseUp(func (button input.Button) {
+				if button != input.ButtonLeft { return }
+				mouseDown = false
+				updateStyle()
+			}),
+			box.OnFocusEnter(updateStyle),
+			box.OnFocusLeave(updateStyle))
+		
+	case "TextInput", "NumberInput":
+		box.SetPadding(tomo.I(5, 4, 4, 5))
+		updateStyle := func () {
+			border := []tomo.Border {
+				engravedBorder,
+				gapBorder,
+				sunkenShadow,
+			}
+			box.SetColor(inputColor)
+			
+			if box.Focused() {
+				border[1] = focusedBorder
+			}
+			
+			box.SetBorder(border...)
+		}
+		updateStyle()
+		return event.MultiCookie (
+			box.OnFocusEnter(updateStyle),
+			box.OnFocusLeave(updateStyle))
+	
+	case "Container":
+		if role.Variant == "outer" {
+			box.SetPadding(tomo.I(8))
+		}		
+	
+	case "Heading":
+		if textBox, ok := box.(tomo.TextBox); ok {
+			textBox.SetAlign(tomo.AlignMiddle, tomo.AlignMiddle)
+		}
+	
+	case "Separator":
+		box.SetBorder(engravedBorder)
+		box.SetMinimumSize(image.Pt(2, 2))
+	
+	case "Slider":
+		updateStyle := func () {
+			border := []tomo.Border {
+				engravedBorder,
+				gapBorder,
+				sunkenShadow,
+			}
+			box.SetColor(gutterColor)
+			
+			if box.Focused() {
+				border[1] = focusedBorder
+			}
+			
+			box.SetBorder(border...)
+		}
+		updateStyle()
+		return event.MultiCookie (
+			box.OnFocusEnter(updateStyle),
+			box.OnFocusLeave(updateStyle))
+	
+	case "SliderHandle":
+		box.SetMinimumSize(image.Pt(12, 12))
+		border := []tomo.Border {
+			outerShadow,
+			gapBorder,
+			buttonBorder,
+		}
+		box.SetBorder(border...)	
+		box.SetColor(buttonColor)
+	}
+	return event.MultiCookie()
+}