馬特·多米諾 譯/范婕

The tennis ball is such an unassuming object in our lives that we take its appearance for granted. Who hasn’t stumbled upon one of them， forgotten， in the far corner of their closet or garage？ Despite its passive presence， one of the most frenzied internet debates of 2018 centered on its distinctive color： Is it actually yellow， or is it green？ The shade in question originates from an unlikely source： David Attenborough， the legendary British documentarian known internationally for his Planet Earth series， played a pivotal role in how we see the tennis ball today.

The sport of modern tennis was born out of the English game of lawn tennis， which by most accounts was invented in the 1870s. Lawn tennis was an outdoor adaptation of the indoor racket game “real tennis，” which itself was an adoption of the French pastime jeu de paume， or “the palm game.” After many iterations， including balls made of cork， wool， and even human hair， the tennis ball found what was then its ideal form： a ball made of a rubber core encased in white or black melton， a tightly woven and felted fabric.

For nearly a century， tennis balls were white or black. It wasn’t until 1972 that tennis balls took on their bright neon hue. At the time， Attenborough was working as a studio controller for the BBC. In the late 1960s he had led the charge for the BBC to broadcast Wimbledon， perhaps the most iconic of tennis tournaments， in color for the first time ever.

Broadcasting tennis in color brought the matches to life， but it made tracking the ball on screen difficult—especially when it fell near the white courtlines. So the International Tennis Federation （ITF） undertook a study that found that yellow tennis balls were easier for home viewers to see on their screens. An official 1972 ITF rule change required that all regulation balls have a uniform surface and be white or yellow in color. However， Wimbledon did not change the ball color to yellow until 1986.

In 1991， the Chicago Tribune ran a story about white tennis balls making a comeback. In reality， as the article states， most manufacturers never stopped producing white balls in smaller quantities. Grant Golden， a former United States clay court champion， declared that the comeback of white tennis balls would “go right down the toilet” because “the yellow ball is perfect.”

The unmistakable shade of the tennis ball is officially called “optic yellow” by the ITF. But a Google search for “optic yellow color” leads to the online color encyclopedia ColorHexa. There， the shade is listed as #ccff00 and marked as “Fluorescent yellow.”

That slight， blurry line between analogous shades led to the great internet debate： Are tennis balls yellow or are they green？ The origin of the controversy can be traced back to a now-deleted Twitter post by @cgpgrey who asked users to “help solve a marital dispute” and vote on the color of a tennis ball. The tweet led to outlets like The Atlantic taking a deep dive into the topic that touched on human perception and color theory.

The conversation grew to such a degree that even tennis legend Roger Federer weighed in， saying， “They’re yellow， right？” Despite the ITF’s position， the general consensus was that there may not be a true right answer. Maybe you’re a Roger Federer fan and agree with the Swiss legend that the ball is yellow. Or， maybe you’re a Rafael Nadal fan and， out of principle， side with green.

Either way， the next time a tennis ball comes rolling out from the recesses of your closet， take a moment to regard the power of its humble design.

生活中，網(wǎng)球是很普通的小物件，我們從沒(méi)把它當(dāng)回事兒。誰(shuí)沒(méi)在自家儲(chǔ)藏室或車(chē)庫(kù)的某個(gè)旮旯里偶然撿到被遺忘在那兒的網(wǎng)球呢。雖然它不起眼，但其特有的顏色在2018年卻引起了一場(chǎng)網(wǎng)絡(luò)熱議：網(wǎng)球究竟是黃色還是綠色？網(wǎng)球顏色的起源讓人意想不到——憑借《地球脈動(dòng)》系列紀(jì)錄片聞名世界的英國(guó)紀(jì)錄片制作人戴維·阿滕伯勒對(duì)網(wǎng)球如今這個(gè)樣子起到了重要作用。

法國(guó)休閑游戲“手掌擊球（jeu de paume）”引入英國(guó)后，發(fā)展為使用球拍的“室內(nèi)網(wǎng)球”，到了室外則成了草地網(wǎng)球。大多數(shù)記載顯示，到了19世紀(jì)70年代，現(xiàn)代網(wǎng)球這個(gè)體育項(xiàng)目便由草地網(wǎng)球演變誕生。而使用的球在制作上用過(guò)軟木、羊毛甚至人的頭發(fā)等等材料，幾經(jīng)改良后，終于有了就當(dāng)時(shí)來(lái)說(shuō)造型最理想的網(wǎng)球：用橡膠做球芯，外面包裹白色或黑色的麥爾登呢（一種編織緊密的毛氈織物）。

差不多100年的時(shí)間里，網(wǎng)球都是非白即黑，直到1972年，顏色才變得鮮亮。那時(shí)，阿滕伯勒在英國(guó)廣播公司任演播室主管，20世紀(jì)60年代末，他引領(lǐng)英國(guó)廣播公司首次以彩色畫(huà)面的形式直播溫布爾登網(wǎng)球錦標(biāo)賽，該賽事或許可以說(shuō)是最具代表性的網(wǎng)球錦標(biāo)賽。

彩色的播放畫(huà)面讓比賽看起來(lái)更鮮活，但要在電視屏幕上看清楚運(yùn)動(dòng)中的球卻不容易，尤其當(dāng)球落到賽場(chǎng)白色界線附近的時(shí)候。于是，國(guó)際網(wǎng)球聯(lián)合會(huì)（ITF）進(jìn)行了一項(xiàng)測(cè)驗(yàn)，發(fā)現(xiàn)黃色的球能讓在家通過(guò)電視觀賽的人比較容易看清楚。1972年，ITF正式調(diào)整網(wǎng)球規(guī)則，規(guī)定凡是正規(guī)賽事用球，其表面必須是統(tǒng)一的白色或黃色。然而，溫網(wǎng)直到1986年才使用黃色球。

1991年，美國(guó)《芝加哥論壇報(bào)》刊登文章說(shuō)，白色網(wǎng)球重回賽場(chǎng)。其實(shí)，正如文章所述，大多數(shù)生產(chǎn)商一直都在少量生產(chǎn)白色網(wǎng)球。曾獲紅土場(chǎng)網(wǎng)球賽冠軍的美國(guó)運(yùn)動(dòng)員格蘭特·戈?duì)柕菂s認(rèn)為“不可能”用回白球，因?yàn)椤包S球才是最合適的”。

“視覺(jué)黃”是ITF對(duì)網(wǎng)球那獨(dú)特顏色的正式叫法。用谷歌搜索“視覺(jué)黃色”，會(huì)出現(xiàn)一個(gè)名為ColorHexa的顏色信息網(wǎng)站，在這個(gè)網(wǎng)站上，網(wǎng)球的顏色被稱為“熒光黃”，代碼為#ccff00。

相似色度之間差別甚微、界限不明，這在互聯(lián)網(wǎng)上引發(fā)了熱議：網(wǎng)球的顏色是黃還是綠？爭(zhēng)論的源頭是一位網(wǎng)名為cgpgrey的人在推特發(fā)布的一條帖子（現(xiàn)已刪除），這個(gè)人請(qǐng)網(wǎng)友“幫忙解決一個(gè)夫妻分歧”，在網(wǎng)球顏色這個(gè)問(wèn)題上投票。這條帖子還使《大西洋》月刊等媒體在人類認(rèn)知和色彩理論的話題上展開(kāi)了深入探討。

議論熱度越來(lái)越高，連網(wǎng)壇傳奇球星羅杰·費(fèi)德勒也表達(dá)了自己的看法：“網(wǎng)球是黃色的，對(duì)吧？”盡管ITF說(shuō)的是“視覺(jué)黃”，但人們普遍認(rèn)為這個(gè)問(wèn)題或許不存在正確答案。如果你是羅杰·費(fèi)德勒的粉絲，可能會(huì)與這位瑞士球星看法一致，認(rèn)為網(wǎng)球是黃色;而如果是拉菲爾·納達(dá)爾的粉絲，也許不加思考就覺(jué)得網(wǎng)球是綠色。

不管你支持誰(shuí)，下次再有網(wǎng)球從你家儲(chǔ)藏室哪個(gè)旮旯?jié)L出來(lái)的時(shí)候，注意看一下它簡(jiǎn)約而不簡(jiǎn)單的設(shè)計(jì)吧。