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colour

Color (American English) or colour (Commonwealth English) is the visual perceptual property corresponding in humans to the categories called blue, green, red, etc. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects or materials based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space colors can be identified numerically by their coordinates.
Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.
The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what is commonly referred to simply as light).

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  1. S

    Boiler condensate colour

    Hi All New to the forum and would like some advice regarding flue gas condensate colour please. Carried out a repair this afternoon and checked flue gas . c02 in line with manufactures instructions and clean on the c0 side of things . Upon completion emptied my analyser trap and noticed the...
  2. MrGatch

    Flow/Return Colour Codes

    Are the any standard colour-codes or conventions for labeling central heating, water and gas pipes? I'm looking at insulating the pipes in my cellar and am considering marking up the flow/return and H/C water pipes as I'm going along. Appreciate that yellow is for gas and possibly red/blue for...
  3. J

    Colour match for chip repair

    Hi, I have a bathstore liberty shower bath with a couple of scratches. I'm trying to find out the ICI colour, but bathstore customer service just isn't. It would appear most baths are iW28 European white, but the main brands like cramer sell artic white repair kits. Would anyone know if...
    • Jeepy
    • Thread
    • america colour repair usa
    • Replies: 2
    • Forum: USA
  4. GameForkStudio

    Green colour inside copper pipes safe?

    Hi all, I have just changed my kitchen sink tap and this involved cutting the copper pipes under the sink. I noticed a green colour inside the pipes. When I wiped it with a tissue, the tissue became green. Since this is the main house tap and we drink from it, I was wondering if the green...
  5. Dan

    Back Ground Colour of Private Forum Areas

    I notice it isn't easy to spot which forum category you're posting in once you are in an existing thread so I've made the background colour kind of light orange. So if you clock the light orange you're posting in a private area of the forum. More to the point if it is white, you could be in...
  6. townfanjon

    2 ports

    Guys, swapping over some old BG 2ports ( think danfoss or drayton ) to honeywell , guys taken a pic of the wires to save me tripping over. 5 wires , look same colour as the honeywell , and idea, is it straight swap colour for colour . many thanks
  7. B

    Cracked basin, old colour

    Anyone point me to a place where I can get a basin in like a pale avocado green colour, two tap hole? Any help would be appreciated!
  8. D

    Black mains water pipe

    Is LDPE pipe the same as Alkathene or are they two different pipes.?
  9. B

    Surrey Flange Installation Problem

    Hi, I am trying to install a surrey flange in my hot water cylinder. After deconnecting existing pipework and male adaptor, I have discovered that my hot water cylinder has a rim protruding inside (at the bottom end of the thread) which effectively restricts the diameter of the hole to the...
  10. M

    Sentinel x800 cleaner - what colour and should their be lumps????

    Following on from my alien in the header tank thread, I have now cleaned it all, and I am about to add my cleaner ready for the flush tomorrow... However I have just opened the bottle of sentinel x800 cleaner and its brown like sand! And has lumps in it?!? Is this right??? Or do I need to get...
  11. S

    Seesnake Ridgid Kollman Colour with 200ft mini-seesnake plus

    Here's for sale a Ridgid SeeSnake Colour Monitor VCR Kollmann and a Mini SeeSnake Plus of 200ft long with the ss camera head. All the equipment is working perfectly. 3500$ If you want to give a price im open but not less than 3000$ Send me a private message Have a nice day SD
  12. R

    copper pipe - how to disguise? what kind of paint?

    Hi, We have copper pipe (for gas) on the external walls of our house as just had gas central heating installed. Its very shiny and I don't want it to get stolen and it doesn't look great either, and its quite thick, and attached with white clips. What would you advise I do to disguise it? I have...
  13. P

    led colour changing shower head

    Surely a must for all those bathroom refurbs to give that extra vav a voom reserved one for tomorrow,will leave blind up in bathroom tomorrow night to show off to neighbours ,might even fit the shower head as well! :sailor:
  14. quality

    Colour of gas

    I went to a job (gas leak) this morning found it no probs, but old lady was confused as to why could smell gas but not see it. She was convinced that gas was green. There was a little laughter in the discussion after the repair but I could have told her it was blue and she would of believed it...
  15. P

    new deal from TMS print A6 full colour cards printing deal

    System3 has been in contact with Ricky at TMS Print and got a good deal on A6 cards: 1,000 x A6 leaflets printed 2 sides on 250gsm gloss art card £45. I'll try to help out with information on how to correctly supply a file for litho printing at a professional printer on another sticky if you...
  16. T

    Muro colour maintenance

    Anyone ever heard of this mob? been offered some contract maintenance work paperwor they sent through looks okay and the rates are fair. Trouble is I have a deep mis-trust of some of these firms but work is short just now could do with some easy stuff to keep the cashflow.
  17. C

    combi boiler wiring colours

    hi guys just been looking at wiring diagram for a combi, noticed lots of different colour wires ie brown, black blue, yellow, white, black etc do all combi wires have the same wiring colours to the same components and do these different colour wires identify the wire ie white = switch live...
  18. 7

    copper pipes in concrete flooring

    I 've got to move a radiator where the copper pipes are buried in concrete. Have exposed pipework (it was sleeved with plastic bag type sleeving) the copper is now bright/luminous blue! Having wire wooled the pipe I can remove most of the blue but the pipe still feels bumpy in places & still has...
  19. S

    water colour

    hi everyone just joined today so dont know if ime doing this right but here goes anyway. when i run hot water it comes out a milky colour . ive got a combi. any help appreciated. colin
  20. G

    tru wall pipes

    Can antone tell me what these pipes are made from as they are not copper. they were installed in the 70's. Also will the scrap merchants take them if they are removed as they are not copper?
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