0.01 to 3.0% by weight of one or more polymerizable compounds of formula I

P-Sp-A^a-(Z^a-A^b)_z-R^b

wherein each of the individual radicals, independently of each other and on each occurrence identically or differently, have the following meanings

R^b is P-Sp- or R,

R is F, Cl, —CN or a straight chain alkyl having 1 to 25 C atoms or branched or cyclic alkyl having 3 to 25 C atoms, wherein one or more non-adjacent CH₂-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, CR⁰═CR⁰⁰—, —C≡C—

P is a polymerizable group,

Sp is a spacer group which is optionally substituted by P, or is a single bond,

A^a, A^b is an alicyclic, heterocyclic, aromatic or heteroaromatic group with 4 to 20 ring atoms, which is monocyclic or polycyclic and which is optionally substituted by one or more groups L or P-Sp-,

Z^a is —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —OCH₂—, —CH₂O—, —SCH₂—, —CH₂S—, —CF₂O—, —OCF₂—, —CF₂S—, —SCF₂—, —(CH₂)_n1—, —CF₂CH₂—, —CH₂CF₂—, —(CF₂)_n1—, —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C≡C—, —CH═CH—CO—O—, —O—CO—CH═CH—, —CH₂—CH₂—CO—O—, —O—CO—CH₂—CH₂—, —CR⁰R⁰⁰—, or a single bond,

R⁰, R⁰⁰ is H or alkyl having 1 to 12 C atoms,

L is F, Cl, —CN, P-Sp- or a straight chain alkyl having 1 to 25 C atoms or branched or cyclic alkyl having 3 to 25 C atoms, wherein one or more non-adjacent CH₂-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, CR⁰═CR⁰⁰—, —C≡C—

z is 0, 1, 2, 3 or 4,

n1 is 1, 2, 3 or 4,

and further comprising one or more compounds of formula II

wherein each of the individual radicals, independently of each other and on each occurrence identically or differently, have the following meanings

R¹, R² is H or a straight chain alkyl having 1 to 25 C atoms or branched or cyclic alkyl having 3 to 25 C atoms, wherein one or more non-adjacent CH₂-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, CR⁰═CR⁰⁰—, —C≡C—,

A¹, A² is selected from the following formulae

Z¹, Z² is —CH₂CH₂—, —CH═CH—, —CF₂O—, —OCF₂—, —CH₂O—, —OCH₂—, —CO—O—, —O—CO—, —C₂F₄—, —CF═CF—, —CH═CH—CH₂O— or a single bond,

L¹, L², L³, L⁴ is F, Cl, OCF₃, CF₃, CH₃, CH₂F or CHF₂,

Y H, F, Cl, CF₃, CHF₂ or CH₃,

L^C CH₃ or OCH₃,

a1 0, 1 or 2, and

a2 0 or 1,

and further comprising at least one dichroic dye absorbing green light and/or at least one dichroic dye absorbing red light,

wherein the LC comprises one or more dichroic dyes of formulae I*

wherein each of the individual radicals, independently of each other and on each occurrence identically or differently, have the following meanings

Z¹¹ and Z¹² denote a single bond, —N═N—, —OCO— or —COO—,

R¹¹ and R¹² denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 20 C-atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 20 C-atoms, or alkylaminyl, dialkylaminyl, alkylcarbonyl, alkyloxycarbonyl, alkylcarbonyloxy or alkyloxycarbonyloxy with 3 to 20 C-atoms, or alkylcyclohexylalkyl with 8 to 25 C-atoms,

i and j are independently of each other 1, 2, 3 or 4.