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CSS 顏色


CSS 顏色

使用CSS時,您可以指定不同方式范圍內的顏色。

我們可以使用預定義的顏色名稱。或者我們可以為每個紅色,綠色和藍色組件使用十進制或十六進制值。

十進制值由逗號分隔,十六進制值為通常以#為前綴,如#ffffff,表示白色。

下表具有一些預定義的顏色名稱及其十進制和十六進制等效值。

顏色名稱十六進制十進制
black#0000000,0,0
green#0080000,128,0
silver#C0C0C0192,192,192
lime#00FF000,255,0
gray#808080128,128,128
olive#808000128,128,0
white#FFFFFF255,255,255
yellow#FFFF00255,255,0
maroon#800000128,0,0
navy#0000800,0,128
red#FF0000255,0,0
blue#0000FF0,0,255
purple#800080128,0,128
teal#0080800,128,128
aqua#00FFFF0,255,255

這些被稱為基本顏色名稱。

下表顯示了可以使用的擴展灰度陰影。

顏色名稱十六進制十進制
darkgray#a9a9a9169,169,169
darkslategray#2f4f4f47,79,79
dimgray#696969105,105,105
gray#808080128,128,128
lightgray#d3d3d3211,211,211
lightslategray#778899119,136,153
slategray#708090112,128,144

RGB值簡寫

對紅色,綠色和藍色分量使用十六進制值。每對都是十六進制符號,范圍為00 - FF。

十六進制值通常以#作為前綴,如#ffffff,表示白色。 “純”藍色將被寫入#0000FF,“純”紅色被寫入#FF0000。

#RGB是上述六位數符號的較短形式。在此格式中,每個數字都被復制以獲得等效的六位數值,例如#F7C變為#FF77CC。

<!DOCTYPE HTML>
<html>
    <head>
        <style>
body {
    background-color: yellow;
}

div#one {
    width: 50px;
    height: 50px;
    border: 1px solid rgb(128, 128, 128);
    margin: 5px;
    float: left;
    background-color: #000;
}
        </style>
    </head>
    <body>
        <div id="one"></div>
    </body>
</html>

顏色函數

顏色名稱和簡單的十六進制值不是您可以指定顏色的唯一方法。

有許多函數允許您選擇顏色。

  • rgb(r,g,b)使用RGB模型指定顏色。
    示例:rgb(112,128,144)
  • rgba(r,g,b,a)使用RGB模型指定顏色,添加了alpha值以指定不透明度。 值為0是完全透明的; 值為1是完全不透明的。
    示例:rgba(112,128,144,0.4)
  • hsl(h,s,l)使用色相,飽和度和亮度(HSL)模型指定顏色。
    示例:hsl(120,100%,22%)
  • hsla(h,s,l,a)使用alpha值來指定不透明度。
    示例:hsla(120,100%,22%,0.4)

rgb(rrr.rr%,ggg.gg%,bbb.bb%)使用0%到100%范圍內的RGB值,允許十進制值(例如75.5%)。因此,黑色的值將是rgb(0%,0%,0%),而藍色將是rgb(0%,0%,100%)。

rgb(rrr,ggg,bbb)中,接受的值范圍是0-255。范圍是十六進制的00-FF的十進制等效值。在此格式中,綠色將為rgb(0,255,0),白色將表示為rgb(255,255,255)。

下表列出了顏色名稱,十六進制顏色值和rgb顏色值。

顏色HEXCOLORRGB顏色
Black#000000rgb(0,0,0)
Red#FF0000rgb(255,0,0)
Green#00FF00rgb(0,255,0)
Blue#0000FFrgb(0,0,255)
Yellow#FFFF00rgb(255,255,0)
Cyan#00FFFFrgb(0,255,255)
Magenta#FF00FFrgb(255,0,255)
Gray#C0C0C0rgb(192,192,192)
White#FFFFFFrgb(255,255,255)

以下代碼顯示如何使用色彩函數。

<!DOCTYPE HTML> 
<html> 
<body> 
    <p style="background-color:#C0C0C0"> 
    Color set by using hex value 
    </p> 
    <p style="background-color:rgb(192,192,192)"> 
    Color set by using rgb value 
    </p> 
    <p style="background-color:gray"> 
    Color set by using color name 
    </p> 
</body> 
</html>

在上面的代碼中,我們使用各種形式的顏色值來設置段落的背景顏色。


CSS3中的擴展顏色關鍵字

顏色名稱十六進制RGB
 aliceblue#f0f8ff240,248,255
 antiquewhite#faebd7250,235,215
 aqua#00ffff0,255,255
 aquamarine#7fffd4127,255,212
 azure#f0ffff240,255,255
 beige#f5f5dc245,245,220
 bisque#ffe4c4255,228,196
 black#0000000,0,0
 blanchedalmond#ffebcd255,235,205
 blue#0000ff0,0,255
 blueviolet#8a2be2138,43,226
 brown#a52a2a165,42,42
 burlywood#deb887222,184,135
 cadetblue#5f9ea095,158,160
 chartreuse#7fff00127,255,0
 chocolate#d2691e210,105,30
 coral#ff7f50255,127,80
 cornflowerblue#6495ed100,149,237
 cornsilk#fff8dc255,248,220
 crimson#dc143c220,20,60
 cyan#00ffff0,255,255
 darkblue#00008b0,0,139
 darkcyan#008b8b0,139,139
 darkgoldenrod#b8860b184,134,11
 darkgray#a9a9a9169,169,169
 darkgreen#0064000,100,0
 darkgrey#a9a9a9169,169,169
 darkkhaki#bdb76b189,183,107
 darkmagenta#8b008b139,0,139
 darkolivegreen#556b2f85,107,47
 darkorange#ff8c00255,140,0
 darkorchid#9932cc153,50,204
 darkred#8b0000139,0,0
 darksalmon#e9967a233,150,122
 darkseagreen#8fbc8f143,188,143
 darkslateblue#483d8b72,61,139
 darkslategray#2f4f4f47,79,79
 darkslategrey#2f4f4f47,79,79
 darkturquoise#00ced10,206,209
 darkviolet#9400d3148,0,211
 deeppink#ff1493255,20,147
 deepskyblue#00bfff0,191,255
 dimgray#696969105,105,105
 dimgrey#696969105,105,105
 dodgerblue#1e90ff30,144,255
 firebrick#b22222178,34,34
 floralwhite#fffaf0255,250,240
 forestgreen#228b2234,139,34
 fuchsia#ff00ff255,0,255
 gainsboro#dcdcdc220,220,220
 ghostwhite#f8f8ff248,248,255
 gold#ffd700255,215,0
 goldenrod#daa520218,165,32
 gray#808080128,128,128
 green#0080000,128,0
 greenyellow#adff2f173,255,47
 grey#808080128,128,128
 honeydew#f0fff0240,255,240
 hotpink#ff69b4255,105,180
 indianred#cd5c5c205,92,92
 indigo#4b008275,0,130
 ivory#fffff0255,255,240
 khaki#f0e68c240,230,140
 lavender#e6e6fa230,230,250
 lavenderblush#fff0f5255,240,245
 lawngreen#7cfc00124,252,0
 lemonchiffon#fffacd255,250,205
 lightblue#add8e6173,216,230
 lightcoral#f08080240,128,128
 lightcyan#e0ffff224,255,255
 lightgoldenrodyellow#fafad2250,250,210
 lightgray#d3d3d3211,211,211
 lightgreen#90ee90144,238,144
 lightgrey#d3d3d3211,211,211
 lightpink#ffb6c1255,182,193
 lightsalmon#ffa07a255,160,122
 lightseagreen#20b2aa32,178,170
 lightskyblue#87cefa135,206,250
 lightslategray#778899119,136,153
 lightslategrey#778899119,136,153
 lightsteelblue#b0c4de176,196,222
 lightyellow#ffffe0255,255,224
 lime#00ff000,255,0
 limegreen#32cd3250,205,50
 linen#faf0e6250,240,230
 magenta#ff00ff255,0,255
 maroon#800000128,0,0
 mediumaquamarine#66cdaa102,205,170
 mediumblue#0000cd0,0,205
 mediumorchid#ba55d3186,85,211
 mediumpurple#9370db147,112,219
 mediumseagreen#3cb37160,179,113
 mediumslateblue#7b68ee123,104,238
 mediumspringgreen#00fa9a0,250,154
 mediumturquoise#48d1cc72,209,204
 mediumvioletred#c71585199,21,133
 midnightblue#19197025,25,112
 mintcream#f5fffa245,255,250
 mistyrose#ffe4e1255,228,225
 moccasin#ffe4b5255,228,181
 navajowhite#ffdead255,222,173
 navy#0000800,0,128
 oldlace#fdf5e6253,245,230
 olive#808000128,128,0
 olivedrab#6b8e23107,142,35
 orange#ffa500255,165,0
 orangered#ff4500255,69,0
 orchid#da70d6218,112,214
 palegoldenrod#eee8aa238,232,170
 palegreen#98fb98152,251,152
 paleturquoise#afeeee175,238,238
 palevioletred#db7093219,112,147
 papayawhip#ffefd5255,239,213
 peachpuff#ffdab9255,218,185
 peru#cd853f205,133,63
 pink#ffc0cb255,192,203
 plum#dda0dd221,160,221
 powderblue#b0e0e6176,224,230
 purple#800080128,0,128
 red#ff0000255,0,0
 rosybrown#bc8f8f188,143,143
 royalblue#4169e165,105,225
 saddlebrown#8b4513139,69,19
 salmon#fa8072250,128,114
 sandybrown#f4a460244,164,96
 seagreen#2e8b5746,139,87
 seashell#fff5ee255,245,238
 sienna#a0522d160,82,45
 silver#c0c0c0192,192,192
 skyblue#87ceeb135,206,235
 slateblue#6a5acd106,90,205
 slategray#708090112,128,144
 slategrey#708090112,128,144
 snow#fffafa255,250,250
 springgreen#00ff7f0,255,127
 steelblue#4682b470,130,180
 tan#d2b48c210,180,140
 teal#0080800,128,128
 thistle#d8bfd8216,191,216
 tomato#ff6347255,99,71
 turquoise#40e0d064,224,208
 violet#ee82ee238,130,238
 wheat#f5deb3245,222,179
 white#ffffff255,255,255
 whitesmoke#f5f5f5245,245,245
 yellow#ffff00255,255,0
 yellowgreen#9acd32154,205,50

例子

以下代碼顯示如何使用顏色名稱及其相應的RGB值和十六進制等效值。

<!DOCTYPE HTML>
<html>
<head>
<title>Named colors in CSS</title>
<style type="text/css">
table {border-spacing: 2em 1em;margin:25px auto;
}
caption {font-family:Tahoma, Geneva, sans-serif;font-weight:bold;font-size:20px;
}
td {border: #000 solid 1px;
  text-align:center;padding:10px;font-family:Tahoma, Geneva, sans-serif;font-size:14px;font-weight:bold;color:#FFF;width:7em;
  white-space: pre;
}
#aqua {background-color:aqua;
}
#black {background-color:black;
}
#blue {background-color:blue;
}
#fuchsia {background-color:fuchsia;
}
#gray {background-color:gray;
}
#green {background-color:green;
}
#lime {background-color:lime;
}
#maroon {background-color:maroon;
}
#navy {background-color:navy;
}
#olive {background-color:olive;
}
#purple {background-color:purple;
}
#red {background-color:red;
}
#silver {background-color:silver;
}
#teal {background-color:teal;
}
#white {background-color:white;
}
#yellow {background-color:yellow;
}
#aqua, #fuchsia, #lime, #red, #silver, #white, #yellow {color:black;
}
</style>
</head>

<body>
<table>
    <caption>
    Basic Color Keywords
    </caption>
    <tr>
        <td id="aqua">aqua
#00FFFF
0, 255, 255</td>
        <td id="black">black
#000000
0, 0, 0</td>
        <td id="blue">blue
#0000FF
0, 0, 255</td>
        <td id="fuchsia">fuchsia
#FF00FF
255, 0, 255</td>
    </tr>
    <tr>
        <td id="gray">gray
#808080
128, 128, 128</td>
        <td id="green">green
#008000
0, 128, 0</td>
        <td id="lime">lime
#00FF00
0, 255, 0</td>
        <td id="maroon">maroon
#800000
128, 0, 0</td>
    </tr>
    <tr>
        <td id="navy">navy
#000080
0, 0, 128</td>
        <td id="olive">olive
#808000
128, 128, 0</td>
        <td id="purple">purple
#800080
128, 0, 128</td>
        <td id="red">red
#FF0000
255, 0, 0</td>
    </tr>
    <tr>
        <td id="silver">silver
#C0C0C0
192, 192, 192</td>
        <td id="teal">teal
#008080
0, 128, 128</td>
        <td id="white">white
#FFFFFF
255, 255, 255</td>
        <td id="yellow">yellow
#FFFF00
255, 255, 0</td>
    </tr>
</table>
</body>
</html>

上面的代碼呈現如下:

css

顏色

擴展顏色關鍵字