"And if I'd declined? Were you supposed to ask someone else?" 

"No," the robot said. "But let's face it, Miss Clay. You weren't very likely to turn him down." 

As we flew on, the conveyor's shock wave gouged a foaming channel in the sea behind it. I thought of a brush drawn through wet paint on marble, exposing the white surface beneath. I took out Zima's invitation and held it against the horizon ahead of us, trying to decide whether the blue was a closer match to the sky or the sea. Against these two possibilities the card seemed to flicker indeterminately. 

Zima Blue. It was an exact thing, specified scientifically in terms of angstroms and intensities. If you were an artist, you could have a batch of it maked up according to that specification. But no one ever used Zima Blue unless they were making a calculated statement about Zima himself. 

Zima was already unique by the time he emerged into the public eye. He had undergone radical procedures to enable him to tolerate extreme environments without the burden of a protective suit. Zima had the appearance of a well-built man wearing a tight body stocking, until you were close and you realised that this was actually his skin. Covering his entire form, it was a synthetic material that could be tuned to different colours and textures depending on his mood and surroundings. It could approximate clothing if the social circumstances demanded it. The skin could contain pressure when he wished to experience vacuum, and stiffen to protect him against the crush of a gas giant planet. Despite these refinements the skin conveyed a full range of sensory impressions to his mind. He had no need to breathe, since his entire cardiovascular system had been replaced by closed-cycle life-support mechanisms. He had no need to eat or drink; no need to dispose of bodily waste. Tiny repair machines swarmed through his body, allowing him to tolerate radiation doses that would have killed an ordinary man in minutes. 

“如果我拒绝了呢？你是不是应该再找一个人？”  

“不，”机器佣人回答，“不要再瞎猜了，让我们一起面对，克莱小姐。你肯定不会拒绝他的。”  

在飞行途中，输送机在海面上激起阵阵波涛，留下了一道泡沫形成的路线。这就像是有人用一把刷子，在涂了颜料但是还没干的汉白玉上画了一道杠，把颜料下面的白低给露了出来。我接受了齐玛的邀请，直奔前方的地平线。我心里一直在思考，齐玛的标志性蓝色究竟是接近天空的颜色，还是更接近大海的颜色。对比这两种颜色，我觉得邀请卡上的颜色让我眼前一亮。  

齐玛蓝！这种颜色非常精确，从科学的角度分析，必须要测量它的光谱带宽和强度，才能把它分辨出来。  

如果你是一个画家，你肯定会根据光谱带宽和强度混合出一系列的颜色。但是没有人能混合出齐玛蓝，除非他们计算出了齐玛的颜色参数。  

齐玛刚刚进入公众视野的时候，他已经是独一无二的了。他的身体接受了最彻底的改造，即使不穿防护服他，也能应付极端严酷的环境。从远处看，齐玛就是一个身材极好的男人，穿着紧身连体衣裤。只有走近看才会意识到，他根本没穿衣服，表面的那一层其实是他的皮肤。  

他的整个身体被一种合成材料覆盖，这种合成材料会根据他的心情和周围的环境变换颜色和纹理。如果在社交场合，他的皮肤就会变成礼服。而且这种皮肤能够抵御巨大的压力。如果他想体验一下真空状态，这层皮肤会控制住他的自身压力，不会发生爆炸；如果他要到巨型气态行星上去游览一番，这层皮肤又能抵御住外部极强的挤压。他的皮肤不但刀枪不入，而且能将全方位的感知准确地传递给大脑。更厉害的是，他根本无需呼吸，因为他的整个心血管循环系统已经被封闭的自循环生命维持系统替代。他无需吃喝，无需处理体内垃圾。纳米级的微型修复机器人遍布身体，使他能够忍受在几分钟内足以杀死一个普通人的辐射。