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URI: http://www.j-a-b.net/web/hue/color-calc-percent
last updated: 2009-12-04
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Subject Index

Transformation Between Percentage and 8bit Values

The following two charts list the transformation of 8bit colour values to percentage values and vice versa. In the column UA, the values browsers will use are listet as well. Notice that Netscape 7.1 always rounds down.

Transformation of percentage values to 8bit values
%: relative value \| rgb: 8bit-value \| UA: User Agent (I.E.6, Opera 7.1, Netscape 7.1) \| NN: Netscape Navigator `rgb = i% x 2.55`
%	rgb	UA	NN	%	rgb	UA	%	rgb	UA	%	rgb	UA	%	rgb	UA
%	rgb	UA	NN	%	rgb	UA	%	rgb	UA	%	rgb	UA	%	rgb	UA
`rgb = i% x 2.55` %: relative value \| rgb: 8bit-value \| UA: User Agent (I.E.6, Opera 7.1, Netscape 7.1) \| NN: Netscape Navigator
0	0	0		1	2.55	2	2	5.1	5	3	7.65	7	4	10.2	10
5	12.75	12		6	15.3	15	7	17.85	17	8	20.4	20	9	22.95	22
10	25.5	25		11	28.05	28	12	30.6	30	13	33.15	33	14	35.7	35
15	38.25	38		16	40.8	40	17	43.35	43	18	45.9	45	19	48.45	48
20	51	51	50	21	53.55	53	22	56.1	56	23	58.65	58	24	61.2	61
25	63.75	63		26	66.3	66	27	68.85	68	28	71.4	71	29	73.95	73
30	76.5	76		31	79.05	79	32	81.6	81	33	84.15	84	34	86.7	86
35	89.25	89		36	91.8	91	37	94.35	94	38	96.9	96	39	99.45	99
40	102	102	101	41	104.55	104	42	107.10	107	43	109.65	109	44	112.2	112
45	114.75	114		46	117.3	117	47	119.85	119	48	122.4	122	49	124.95	124
50	127.5	127		51	130.05	130	52	132.6	132	53	135.15	135	54	137.7	137
55	140.25	140		56	142.8	142	57	145.35	145	58	147.9	147	59	150.45	150
60	153	153	152	61	155.55	155	62	158.1	158	63	160.65	160	64	163.2	163
65	165.75	165		66	168.3	168	67	170.85	170	68	173.4	173	69	175.95	175
70	178.5	178		71	181.05	181	72	183.6	183	73	186.15	186	74	188.7	188
75	191.25	191		76	193.8	193	77	196.35	196	78	198.9	198	79	201.45	201
80	204	204	203	81	206.55	206	82	209.1	209	83	211.65	211	84	214.20	214
85	216.75	216		86	219.3	219	87	221.85	221	88	224.4	224	89	226.95	226
90	229.5	229		91	232.05	232	92	234.6	234	93	237.15	237	94	239.70	239
95	242.25	242		96	244.8	244	97	247.35	247	98	249.9	249	99	252.45	252
100	255	255

Transformation of 8bit values to percentage values
rgb: 8bit-value \| %: relative value `% = rgb / 2.55`
rgb	%	rgb	%	rgb	%	rgb	%
rgb	%	rgb	%	rgb	%	rgb	%
`% = rgb / 2.55` rgb: 8bit-value \| %: relative value
0	0	1	0.39215686	2	0.78431373	3	1.17647059
4	1.56862745	5	1.96078431	6	2.35294118	7	2.74509804
8	3.13725490	9	3.52941176	10	3.92156863	11	4.31372549
12	4.70588235	13	5.09803922	14	5.49019608	15	5.88235294
16	6.27450980	17	6.66666667	18	7.05882353	19	7.45098039
20	7.84313725	21	8.23529412	22	8.62745098	23	9.01960784
24	9.41176471	25	9.80392157	26	10.19607843	27	10.58823529
28	10.98039216	29	11.37254902	30	11.76470588	31	12.15686275
32	12.54901961	33	12.94117647	34	13.33333333	35	13.72549020
36	14.11764706	37	14.50980392	38	14.90196078	39	15.29411765
40	15.68627451	41	16.07843137	42	16.47058824	43	16.86274510
44	17.25490196	45	17.64705882	46	18.03921569	47	18.43137255
48	18.82352941	49	19.21568627	50	19.60784314	51	20
52	20.39215686	53	20.78431373	54	21.17647059	55	21.56862745
56	21.96078431	57	22.35294118	58	22.74509804	59	23.13725490
60	23.52941176	61	23.92156863	62	24.31372549	63	24.70588235
64	25.09803922	65	25.49019608	66	25.88235294	67	26.27450980
68	26.66666667	69	27.05882353	70	27.45098039	71	27.84313725
72	28.23529412	73	28.62745098	74	29.01960784	75	29.41176471
76	29.80392157	77	30.19607843	78	30.58823529	79	30.98039216
80	31.37254902	81	31.76470588	82	32.15686275	83	32.54901961
84	32.94117647	85	33.33333333	86	33.72549020	87	34.11764706
88	34.50980392	89	34.90196078	90	35.29411765	91	35.68627451
92	36.07843137	93	36.47058824	94	36.86274510	95	37.25490196
96	37.64705882	97	38.03921569	98	38.43137255	99	38.82352941
100	39.21568628	101	39.60784314	102	40	103	40.39215686
104	40.78431373	105	41.17647059	106	41.56862745	107	41.96078431
108	42.35294118	109	42.74509804	110	43.13725490	111	43.52941176
112	43.92156863	113	44.31372549	114	44.70588235	115	45.09803922
116	45.49019608	117	45.88235294	118	46.27450980	119	46.66666667
120	47.05882353	121	47.45098039	122	47.84313725	123	48.23529412
124	48.62745098	125	49.01960784	126	49.41176471	127	49.80392157
128	50.19607843	129	50.58823529	130	50.98039216	131	51.37254902
132	51.76470588	133	52.15686275	134	52.54901961	135	52.94117647
136	53.33333333	137	53.72549020	138	54.11764706	139	54.50980392
140	54.90196078	141	55.29411765	142	55.68627451	143	56.07843137
144	56.47058824	145	56.86274510	146	57.25490196	147	57.64705882
148	58.03921569	149	58.43137255	150	58.82352941	151	59.21568627
152	59.60784313	153	60	154	60.39215686	155	60.78431373
156	61.17647059	157	61.56862745	158	61.96078431	159	62.35294118
160	62.74509804	161	63.13725490	162	63.52941176	163	63.92156863
164	64.31372549	165	64.70588235	166	65.09803922	167	65.49019608
168	65.88235294	169	66.27450980	170	66.66666667	171	67.05882353
172	67.45098039	173	67.84313725	174	68.23529412	175	68.62745098
176	69.01960784	177	69.41176471	178	69.80392157	179	70.19607843
180	70.58823529	181	70.98039216	182	71.37254902	183	71.76470588
184	72.15686275	185	72.54901961	186	72.94117647	187	73.33333333
188	73.72549020	189	74.11764706	190	74.50980392	191	74.90196078
192	75.29411765	193	75.68627451	194	76.07843137	195	76.47058824
196	76.86274510	197	77.25490196	198	77.64705882	199	78.03921569
200	78.43137255	201	78.82352941	202	79.21568627	203	79.60784314
204	80	205	80.39215686	206	80.78431373	207	81.17647059
208	81.56862745	209	81.96078431	210	82.35294118	211	82.74509804
212	83.13725490	213	83.52941176	214	83.92156863	215	84.31372549
216	84.70588235	217	85.09803922	218	85.49019608	219	85.88235294
220	86.27450980	221	86.66666667	222	87.05882353	223	87.45098039
224	87.84313725	225	88.23529412	226	88.62745098	227	89.01960784
228	89.41176471	229	89.80392157	230	90.19607843	231	90.58823529
232	90.98039216	233	91.37254901	234	91.76470588	235	92.15686275
236	92.54901961	237	92.94117647	238	93.33333333	239	93.72549020
240	94.11764706	241	94.50980392	242	94.90196078	243	95.29411765
244	95.68627451	245	96.07843137	246	96.47058824	247	96.86274510
248	97.25490196	249	97.64705882	250	98.03921569	251	98.43137255
252	98.82352941	253	99.21568627	254	99.60784314	255	100

Subject Index

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