Title: Pan-Slavic colors
Content:  The Pan-Slavic colors (or colours) — red, blue and white — were defined by the Prague Slavic Congress, 1848, based on the flag of Russia, which was introduced in the late 17th century. The tricolor flag of Russia was itself inspired by the flag of the Netherlands. Historically, many Slavic nations and states adopted flags and other national symbols that used some combination of those three colors. List of Slavic countries that use or have used the colors include: Russia, Yugoslavia, Czechoslovakia, Czech Republic, Montenegro, Slovakia, Croatia, Serbia and Slovenia. On the other hand, Belarus, Bulgaria, North Macedonia, Poland and Ukraine have never adopted all the colors. (The Flag of Poland is red and white, but has different roots that pre-date the pan-Slavic colors.) Yugoslavia, both the Kingdom (Kingdom of Yugoslavia, 1918–1943) 
Title: Pan-Slavic colors
Content:  the Republic (SFR Yugoslavia, 1943–1992) was a union of several Slavic nations, and therefore not only sported the pan-Slavic colors but adopted the pan-Slavic flag as its own (later adding a red star). The later Federal Republic of Yugoslavia (1992–2003); a federation of Serbia and Montenegro, and its successor state, the State Union of Serbia and Montenegro (2003–2006) also used the pan-Slavic flag until the final dissolution of Yugoslavia in 2006. Serbia continues to use a flag with all three Pan-Slavic colors, along with Russia, Croatia, Slovakia and Slovenia. The flag of Slovenia was introduced in 1848, when a group of Slovenian intellectuals in Vienna, Austria created the tricolor flag (white-blue-red). Slovakia also has the same tricolor flag design as Slovenia and Russia. The first Slovak flag was also introduced in 1848.
Title: Pan-Slavism
Content:  Extensive pan-Slavism began much like Pan-Germanism, both of which grew from the sense of unity and nationalism experienced within ethnic groups after the French Revolution and the consequent Napoleonic Wars against European monarchies. Like other Romantic nationalist movements, Slavic intellectuals and scholars in the developing fields of history, philology, and folklore actively encouraged the passion of their shared identity and ancestry. Pan-Slavism also co-existed with the Southern Slavic independence. Commonly used symbols of the Pan-Slavic movement were the Pan-Slavic colours (blue, white and red) and the Pan-Slavic anthem, Hey, Slavs. The first pan-Slavists were the 16th-century Croatian writer Vinko Pribojević and the 17th-century Aleksandar Komulović, Bartol 
Title: National flag
Content:  Slavic countries and regions such as former Yugoslavia (Serbia, Montenegro, Croatia) and Bulgaria have been influenced by the design concept of the Russian flag. Therefore, the color of the Russian flag design has also become the source of the meaning of "Pan Slavic color". Many other similarities may be found among current national flags, particularly if inversions of colour schemes are considered, e.g., compare the flag of Senegal to that of Cameroon and Indonesia to Poland and Monaco. Also the flag of Italy and the flag of Hungary use the same colours, although the order and direction differ (the Italian flag is vertical green-white-red and the Hungarian flag is horizontal red-white-green).
Title: Pan-Slavic language
Content:  The history of zonal Slavic languages is closely connected with Pan-Slavism, an ideology that endeavors cultural and political unification of all Slavs, based on the conception that all Slavic people are part of a single Slavic nation. Along with this belief came also the need for an umbrella Slavic language. The strongest candidate for that position among modern languages is Russian, the language of the largest (and, during most of the 19th century, the only) Slavic state, and mother tongue of more than half of Slavs. This option enjoys most of its popularity in Russia itself, but has also been favoured by Pan-Slavists abroad, for example the Slovak Ľudovít Štúr. Others have proposed that Old Church Slavonic would be a better and more 
Title: Pan-Slavic language
Content:  A pan-Slavic language is a zonal auxiliary language for communication among the Slavic peoples. There are approximately 400 million speakers of the Slavic languages. In order to communicate with each other, speakers of different Slavic languages often resort to Russian or English as a lingua franca. But since Slavic languages are closely related lexically and grammatically and are comparatively easy to learn when another Slavic language is already known, there have been numerous attempts to construct a more neutral language that could act as a common language for slavophones.
Title: Flag of Yugoslavia
Content:  The flag of Yugoslavia is a horizontal tricolour of blue #003593 (top), white #ffffff (middle) and red #de0000 (bottom). The design and colours are based on the Pan-Slavic flag adopted at the Pan-Slavic Congress of 1848, in Prague. Following the end of the First World War in 1918, the Southern Slavs united into a single unitary state of the Kingdom of Serbs, Croats and Slovenes, later known as Yugoslavia. The monarchy selected the pan-Slavic design to symbolise the new founded unity of all Southern Slavs. The design consisted of a simple horizontal tricolour with three equal bands of blue (top), white (middle) and red (bottom). Following the end of the Second World War and the abolition of the monarchy in 1945, the new Communist government retained the design of the flag but added a red star with yellow border in the centre. The flag remained in use until the dissolution of Yugoslavia in 1992.
Title: Coat of arms of Carpathian Ukraine
Content:  1848 Spring of Nations about the use of "Pan-Slavic" colors: blue, white, and red, while the supporters of Uniate (Greek Catholic) clergy were standing on position of use blue-yellow colors. Therefore professor Gustav Friedrich presented a compromised decision. That is, by using the four main colors, to offer an emblem "with an image of a bear which earlier was depicted on coat of arms of Uzhhorod city". The arms is parted per pale show three gold bars on blue field in its first (dexter) field and a red bear rampant on silver in its second (sinister) field. In 1924 Czech professor Irži Kralj, a specialist of 
Title: Red
Content:  of the United States Marine Corps. The red on the flag of Nepal represents the floral emblem of the country, the rhododendron. Red, blue, and white are also the Pan-Slavic colors adopted by the Slavic solidarity movement of the late nineteenth century. Initially these were the colors of the Russian flag; as the Slavic movement grew, they were adopted by other Slavic peoples including Slovaks, Slovenes, and Serbs. The flags of the Czech Republic and Poland use red for historic heraldic reasons (see Coat of arms of Poland and Coat of arms of the Czech Republic) & not due to Pan-Slavic connotations. In 2004 Georgia adopted a new white flag, which consists of four 
Title: Coat of arms of Slovakia
Content:  very frequently. As for the colors, the colors are supposed to be the three "Slavic" colors red-white-blue (Slavic tricolor). Since the Upper Hungary coat of arms was already part of the coat of arms of the Kingdom of Hungary at that time, only the color of the three mountains had to be changed (it happened on the Slovak flag for the first time) from green to "blue" to receive the red-white-blue combination. As for the origin of the red color (in the Slovak and in the Hungarian coat of arms), the coat of arms has often had the red color as an almost inseparable attendant of 

Question: What color is Pan-Slavic colors?
Answer: red.
red color.