the invention is now described in greater detail in the description which follows . the term “ blue colour ” has the meaning normally attributed . preferably , this term is defined in the l , a , b colorimetric system by the following values : l any value , a between − 20 and + 20 , b between − 60 and − 30 . the term “ sugar ” has the common meaning in the confectionery art , namely in particular sucrose , glucose or dextrose syrups or mixtures thereof the invention provides a stabilized anthocyanin composition . this anthocyanin is any anthocyanin or its derivatives . in particular , it may be extracted from the elder , from the purple carrot , from the red cabbage , or from other sources such as grape or blackcurrant . it has been found that this composition is particularly stable even after 6 months , whereas anthocyanin solutions are known to be particularly unstable in particular to high ph values . without wishing to be linked to any theory , the applicant thinks that the crystalline form of the sugar stabilizes the anthocyanin . the applicant has found that an anthocyanin incorporated in granulated sugar retains its colour . an anthocyanin which is violet in colour remains of this colour once in sugar . likewise , the blue colour persists once the anthocyanin is combined with granulated sugar . the compositions according to the invention comprise variable quantities of anthocyanins , for example of between 0 . 5 and 10 %, preferably 1 and 5 % by weight relative to the weight of the composition . the remainder of the composition is sugars with optionally other additives conventionally used , normally in quantities of less than 5 %, preferably less than 2 %. the granulated sugar represents in general from 85 to 99 . 5 %, preferably 95 to 99 %. preferably , the outer layer consists of granulated sugar and anthocyanin , conventional additives being optionally added in small quantities , typically less than 1 %. the invention applies in particular to confectionery products of the draée type , namely a core and a layer of granulated sugar . the cores of the compositions of the dragée type are many . they may be a natural centre ( almond , hazelnut , groundnut and the like ) or a “ confectionery ” centre ( boiled sweet , caramel , fondant , chocolate and the like ). the cores may then be coated with chocolate , with successive layers of sugars or other substances such as polyols , gums and natural polymers . the process for manufacturing compositions of the dragée type is the conventional coating process comprising the deposition of a plurality of sublayers , for example between 5 and 30 , by a succession of phases of application and drying carried out , for example , in a pan . other conventional processes allowing the production of granulated sugar are also possible . there may be mentioned the technologies using coating films , which were first applied in the pharmaceutical industry and which are increasingly encountered in confectionery for draées or hard coated confectionery products . the aqueous solution used in this coating process comprises a syrup supplemented with an anthocyanin , at an appropriate ph which is typically between 7 and 9 . the total solids content ( ts ) of the syrup is typically between 60 and 85 , for example about 70 - 75 . the ph is adjusted to the required value ( according to the type of anthocyanin selected ) by adding an appropriate buffer , for example based on sodium hydroxide . the invention therefore allows a stable natural blue colour to be obtained . as a mixture with a colouring of the natural yellow type ( for example curcumin or lutein ), a stable natural green colouring is thus obtained , which was not possible up until now . a solution of red cabbage anthocyanin is prepared from powdered colouring ( anthocyanin supported on maltodextrin ) in water . the colouring : water weight ratio is 30 : 70 . this same solution is supplemented with 1 m sodium hydroxide until the colour is established at blue ( at ph 6 . 06 , the colour is appreciably violet ). the ph of the final solution retained is 7 . 9 . a sugar syrup having a ts of 73 is prepared in parallel . the ph of this syrup is about 8 . 4 . three parts by weight of each solution of colouring are mixed with 97 parts by weight of syrup . the final coloured syrup has , in each case , the same colour as the starting solution . the ph of the violet syrup is about 4 while the ph of the blue syrup is about 7 . 9 . with these coloured syrups , a core comprising a groundnut and a chocolate layer is coated under conventional conditions . dragées having the colour of the starting coloured syrup are obtained after about 20 passes . the layer contains about 98 . 5 % of granulated sugar and about 1 . 5 % of blue anthocyanin . these dragées are placed in packets in which they are usually sold . the packets are stored at ambient temperature , with no special precautions . after more than 12 months , the colour of the draées remains unchanged . two stability tests were also carried out in a saturated atmosphere in a closed chamber , for 7 days . in the first chamber is placed a container of hcl in sufficient quantity to saturate the atmosphere up to a ph of about 3 . 5 ( ph paper ). in the second chamber is placed a container of aqueous ammonia in a sufficient quantity to saturate the atmosphere up to a ph of 10 - 10 . 5 ( ph paper ). after having been kept in the oven in an acidic atmosphere , the dragées have a violet colour while the draées which were kept in the basic atmosphere have a bronze green colour . although the present invention and its advantages have been described in detail , it should be understood that various changes , substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims . moreover , the scope of the present application is not intended to be limited to the particular embodiments of the process , machine , manufacture , composition of matter , means , methods and steps described in the specification . as one of ordinary skill in the art will readily appreciate from the disclosure of the present invention , processes , machines , manufacture , compositions of matter , means , methods , or steps , presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention . accordingly , the appended claims are intended to include within their scope such processes , machines , manufacture , compositions of matter , means , methods , or steps .