diff --git a/index.js b/index.js
index baf8081..05047ab 100644
--- a/index.js
+++ b/index.js
@@ -53,7 +53,7 @@ cs.get.rgb = function (string) {
 	const abbr = /^#([a-f\d]{3,4})$/i;
 	const hex = /^#([a-f\d]{6})([a-f\d]{2})?$/i;
 	const rgba = /^rgba?\(\s*([+-]?(?:\d*\.)?\d+(?:e\d+)?)(?=[\s,])\s*(?:,\s*)?([+-]?(?:\d*\.)?\d+(?:e\d+)?)(?=[\s,])\s*(?:,\s*)?([+-]?(?:\d*\.)?\d+(?:e\d+)?)\s*(?:[\s,|/]\s*([+-]?(?:\d*\.)?\d+(?:e\d+)?)(%?)\s*)?\)$/i;
-	const per = /^rgba?\(\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*(?:[\s,|/]\s*([+-]?[\d.]+)(%?)\s*)?\)$/;
+	const per = /^rgba?\(\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*(?:[\s,|/]\s*([+-]?[\d.]+)(%?)\s*)?\)$/i;
 	const keyword = /^(\w+)$/;
 
 	let rgb = [0, 0, 0, 1];
@@ -101,7 +101,7 @@ cs.get.rgb = function (string) {
 		if (match[4]) {
 			rgb[3] = match[5] ? Number.parseFloat(match[4]) * 0.01 : Number.parseFloat(match[4]);
 		}
-	} else if (match = string.match(keyword)) {
+	} else if (match = string.toLowerCase().match(keyword)) {
 		if (match[1] === 'transparent') {
 			return [0, 0, 0, 0];
 		}
@@ -133,7 +133,7 @@ cs.get.hsl = function (string) {
 		return null;
 	}
 
-	const hsl = /^hsla?\(\s*([+-]?(?:\d{0,3}\.)?\d+)(?:deg)?\s*,?\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*(?:[,|/]\s*([+-]?(?=\.\d|\d)(?:0|[1-9]\d*)?(?:\.\d*)?(?:[eE][+-]?\d+)?)\s*)?\)$/;
+	const hsl = /^hsla?\(\s*([+-]?(?:\d{0,3}\.)?\d+)(?:deg)?\s*,?\s*([+-]?[\d.]+)%\s*,?\s*([+-]?[\d.]+)%\s*(?:[,|/]\s*([+-]?(?=\.\d|\d)(?:0|[1-9]\d*)?(?:\.\d*)?(?:e[+-]?\d+)?)\s*)?\)$/i;
 	const match = string.match(hsl);
 
 	if (match) {
@@ -154,7 +154,7 @@ cs.get.hwb = function (string) {
 		return null;
 	}
 
-	const hwb = /^hwb\(\s*([+-]?\d{0,3}(?:\.\d+)?)(?:deg)?\s*[\s,]\s*([+-]?[\d.]+)%\s*[\s,]\s*([+-]?[\d.]+)%\s*(?:[\s,]\s*([+-]?(?=\.\d|\d)(?:0|[1-9]\d*)?(?:\.\d*)?(?:[eE][+-]?\d+)?)\s*)?\)$/;
+	const hwb = /^hwb\(\s*([+-]?\d{0,3}(?:\.\d+)?)(?:deg)?\s*[\s,]\s*([+-]?[\d.]+)%\s*[\s,]\s*([+-]?[\d.]+)%\s*(?:[\s,]\s*([+-]?(?=\.\d|\d)(?:0|[1-9]\d*)?(?:\.\d*)?(?:e[+-]?\d+)?)\s*)?\)$/i;
 	const match = string.match(hwb);
 
 	if (match) {
diff --git a/test.js b/test.js
index 275977f..b914697 100644
--- a/test.js
+++ b/test.js
@@ -14,20 +14,22 @@ function normalizeAlpha(result) {
 assert.deepEqual(string.get.rgb('#fef'), [255, 238, 255, 1]);
 assert.deepEqual(string.get.rgb('#fffFEF'), [255, 255, 239, 1]);
 assert.deepEqual(string.get.rgb('rgb(244, 233, 100)'), [244, 233, 100, 1]);
-assert.deepEqual(string.get.rgb('rgb(244 233 100)'), [244, 233, 100, 1]);
+assert.deepEqual(string.get.rgb('RGB(244 233 100)'), [244, 233, 100, 1]);
 assert.deepEqual(string.get.rgb('rgb(244.5, 233.5, 100.5)'), [244.5, 233.5, 100.5, 1]);
 assert.deepEqual(string.get.rgb('rgb(244.5 233.5 100.5)'), [244.5, 233.5, 100.5, 1]);
 assert.deepEqual(string.get.rgb('rgb(2.44E2, 2.33e2, 1.00E2)'), [244, 233, 100, 1]);
 assert.deepEqual(string.get.rgb('rgb(2.44E2 2.33e2 1.00E2)'), [244, 233, 100, 1]);
 assert.deepEqual(string.get.rgb('rgb(100%, 30%, 90%)'), [255, 77, 229, 1]);
-assert.deepEqual(string.get.rgb('rgb(100% 30% 90%)'), [255, 77, 229, 1]);
+assert.deepEqual(string.get.rgb('RGB(100% 30% 90%)'), [255, 77, 229, 1]);
 assert.deepEqual(string.get.rgb('transparent'), [0, 0, 0, 0]);
+assert.deepEqual(string.get.rgb('blue'), [0, 0, 255, 1]);
+assert.deepEqual(string.get.rgb('BLUE'), [0, 0, 255, 1]);
 assert.deepEqual(string.get.hsl('hsl(240, 100%, 50.5%)'), [240, 100, 50.5, 1]);
-assert.deepEqual(string.get.hsl('hsl(240 100% 50.5%)'), [240, 100, 50.5, 1]);
+assert.deepEqual(string.get.hsl('HSL(240 100% 50.5%)'), [240, 100, 50.5, 1]);
 assert.deepEqual(string.get.hsl('hsl(240deg, 100%, 50.5%)'), [240, 100, 50.5, 1]);
-assert.deepEqual(string.get.hsl('hsl(240deg 100% 50.5%)'), [240, 100, 50.5, 1]);
+assert.deepEqual(string.get.hsl('hsl(240DEG 100% 50.5%)'), [240, 100, 50.5, 1]);
 assert.deepEqual(string.get.hwb('hwb(240, 100%, 50.5%)'), [240, 100, 50.5, 1]);
-assert.deepEqual(string.get.hwb('hwb(240deg, 100%, 50.5%)'), [240, 100, 50.5, 1]);
+assert.deepEqual(string.get.hwb('HWB(240DEG, 100%, 50.5%)'), [240, 100, 50.5, 1]);
 assert.deepEqual(string.get.hwb('hwb(12 50% 0%)'), [12, 50, 0, 1]);
 
 // Generic .get()
@@ -46,6 +48,8 @@ assert.deepEqual(string.get('rgb(2.44E2 2.33e2 1.00E2)'), {model: 'rgb', value:
 assert.deepEqual(string.get('rgb(100%, 30%, 90%)'), {model: 'rgb', value: [255, 77, 229, 1]});
 assert.deepEqual(string.get('rgb(100% 30% 90%)'), {model: 'rgb', value: [255, 77, 229, 1]});
 assert.deepEqual(string.get('transparent'), {model: 'rgb', value: [0, 0, 0, 0]});
+assert.deepEqual(string.get('blue'), {model: 'rgb', value: [0, 0, 255, 1]});
+assert.deepEqual(string.get('BLUE'), {model: 'rgb', value: [0, 0, 255, 1]});
 assert.deepEqual(string.get('hsl(240, 100%, 50.5%)'), {model: 'hsl', value: [240, 100, 50.5, 1]});
 assert.deepEqual(string.get('hsl(-480, 100%, 50.5%)'), {model: 'hsl', value: [240, 100, 50.5, 1]});
 assert.deepEqual(string.get('hsl(240 100% 50.5%)'), {model: 'hsl', value: [240, 100, 50.5, 1]});