blue

Blue is one of the three primary color of pigments in painting and traditional color theory, as well as in the RGB color model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colors; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall scattering explains blue eyes. Distant objects appear more blue because of another optical effect called atmospheric perspective. Blue has been an important color in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultramarine, the most expensive of all pigments. In the eighth century Chinese artists used cobalt blue to color fine blue and white porcelain.
almond tree - almond branches in bloom
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almond tree

Added 10 days ago by van gogh

41

OLa dogs - this game is very nice
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OLa dogs

Added 2 weeks ago by ania

0

Internet security - Take care of internet security
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Internet security

Added 4 weeks ago by Angelika

10

PUZZLE OF ICT - Arrange the puzzle and read the password that appears.
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PUZZLE OF ICT

Added month ago by KAROLINA

20

Internet - principles of safe use of the network
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Internet

Added month ago by Natalia

3

Internet - Rules for safe use of the network
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Internet

Added month ago by Natalia

3

luca del campero - great flower of the desert of 2'19
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luca del campero

Added 2 months ago by alby

36

Anime Cat - Photo Anime Cat Wallpaper
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Anime Cat

Added 2 months ago by Red Eyes

4

mario mario - mario mario mario mario
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mario mario

Added 2 months ago by ktos

21

snow black - fsa bhgfy loi mkj zs sorry!
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snow black

Added 2 months ago by n.m

43

Anime Girl - Photo Girl Wallpaper
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Anime Girl

Added 2 months ago by Naya

0

safe internet day - safe internet day
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safe internet day

Added 2 months ago by anna

11

Anime Girl - Photo Girl Wallpaper
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Anime Girl

Added 2 months ago by Naya

10

Beata Szydło - Polish MP, MP
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Beata Szydło

Added 2 months ago by Zakreconax3

33

wolność1 - Freedom in a person's life
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wolność1

Added 3 months ago by Paula

19

Carpet Blue Frame - Carpetforyou Blue Frame is an interesting carpet with an abstract pattern reminiscent of strokes of
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Carpet Blue Frame

Added 3 months ago by CarpetForYou

56

flowers and spring - flowers and spring, flowers and spring
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flowers and spring

Added 3 months ago by Jola

108

szczerbatek - blah blah blah blah blah blah blah blah blah blah blah
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szczerbatek

Added 3 months ago by ania

25

bonbonniere - dfghjklòà
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bonbonniere

Added 4 months ago by giusy

34

winter, winter - it's cold in winter
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winter, winter

Added 4 months ago by Basiunia

239

Internet - these puzzles represent the internet
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Internet

Added 4 months ago by dragonek89

26

Secure Internet - It is a poster of the day of secure internet
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Secure Internet

Added 4 months ago by Internet

19

valeria explorers - game scout scouts
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valeria explorers

Added 4 months ago by vale

84

jvifnvsjldfv - vcfdkvfkgbjuhybcdjhnv fd
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jvifnvsjldfv

Added year ago by vfdsvfgdb

10

Anime Girl - Photo Girl Wallpaper
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Anime Girl

Added year ago by Duo Voice

27

nan cat - puzzle for easy puzzle. doll
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nan cat

Added year ago by zuzia

42

Bridge - A bridge for the future.
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Bridge

Added year ago by Margherita Bezzi

51

CHRISTMAS CARD - Christmas wishes for eTwinning Friends
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CHRISTMAS CARD

Added year ago by MARGARET

16

merry xmas - using art to create xmas cards and using xmas cards to write wishes
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merry xmas

Added year ago by maria rosaria

26

Megamocny - Tytułowy Megamocny jest największym na świecie superzłoczyńcą. Jego głównym celem jest pokon
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Megamocny

Added year ago by abu

11

witch emma - Witch Emma (Every Witch Way, 2014-2015) - American comedy telenovela for youth from the fantasy genr
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witch emma

Added year ago by ana

10

witch emma cast - The series describes the story of a fourteen-year-old girl - Emma Alonso (Paola Andino), who is movi
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witch emma cast

Added year ago by ana

7

Monster Inc - Monsters scare children because it's their job, but they are actually scared of them. Once upon
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Monster Inc

Added year ago by inc

9

Flowers Flowers - Colorful flowers, blue flowers
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Flowers Flowers

Added year ago by flowe

718

#kociaki - kittens kittens kittens my favorite cat
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#kociaki

Added year ago by martyna

20

winter winter - I can not wait for winter anymore
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winter winter

Added year ago by Małgorzata

126