Color

To change primary and secondary color you have to change in 2 files, which is explain below:

Override Light Theme Colors

For any change in colors : src/theme/LightTheme.ts 
                    
import type { ThemeTypes } from '@/types/themeTypes/ThemeType';
const BLUE_THEME: ThemeTypes = {
    name: 'BLUE_THEME',
    dark: false,
    variables: {
        'border-color': '#ebf1f6',
        'border-opacity': 1,
    },
    colors: {
        primary: '#1B84FF',
        secondary: '#43CED7',
        info: '#2CABE3',
        success: '#2CD07E',
        accent: '#FFAB91',
        warning: '#F6C000',
        error: '#F8285A',
        purple:'#725AF2',
        indigo:'#6610f2',
        lightprimary: '#EDF5FD',
        lightsecondary: '#F2FCFC',
        lightsuccess: '#EDFDF2',
        lighterror: '#FFF0F4',
        lightwarning: '#FFFCF0',
        lightinfo: '#E4F5FF',
        textPrimary: '#3A4752',
        textSecondary: '#768B9E',
        borderColor: '#ebf1f6',
        inputBorder: '#DFE5EF',
        containerBg: '#ffffff',
        background: '#eef5f9',
        hoverColor: '#f6f9fc',
        surface: '#fff',
        'on-surface-variant': '#fff',
        grey100: '#F2F6FA',
        grey200: '#EAEFF4'
    }
};

export { BLUE_THEME};

Override Dark Theme Colors

For any change in colors : src/theme/DarkTheme.ts 
                    
import type { ThemeTypes } from '@/types/themeTypes/ThemeType';
const DARK_BLUE_THEME: ThemeTypes = {
    name: 'DARK_BLUE_THEME',
    dark: true,
    variables: {
        'border-color': '#333F55',
        'border-opacity': 1,
    },
    colors: {
        primary: '#1B84FF',
        secondary: '#0cb9c5',
        lightprimary: '#253662',
        lightsecondary: '#1C455D',
        lightsuccess: '#1B3C48',
        lighterror: '#4B313D',
        lightwarning: '#4D3A2A',
        lightinfo:'#223662',
        textPrimary: '#EAEFF4',
        textSecondary: '#7C8FAC',
        borderColor: '#333F55',
        inputBorder: '#465670',
        containerBg: '#2a3447',
        background: '#192838',
        surface: '#152332',
        hoverColor: '#333f55',
        'on-surface-variant': '#2a3447',
        grey100: '#333F55',
        grey200: '#465670'
    }
};

const DARK_AQUA_THEME: ThemeTypes = {
    name: 'DARK_AQUA_THEME',
    dark: true,
    variables: {
        'border-color': '#333F55',
        'border-opacity': 1,
    },
    colors: {
        primary: '#0074BA',
        secondary: '#47D7BC',
        lightprimary: '#103247',
        lightsecondary: '#0C4339',
        lightsuccess: '#1B3C48',
        lighterror: '#4B313D',
        lightwarning: '#4D3A2A',
        lightinfo:'#223662',
        textPrimary: '#EAEFF4',
        textSecondary: '#7C8FAC',
        borderColor: '#333F55',
        inputBorder: '#465670',
        containerBg: '#171c23',
        background: '#192838',
        surface: '#152332',
        hoverColor: '#333f55',
        'on-surface-variant': '#171c23',
        grey100: '#333F55',
        grey200: '#465670'
    }
};

const DARK_PURPLE_THEME: ThemeTypes = {
    name: 'DARK_PURPLE_THEME',
    dark: true,
    variables: {
        'border-color': '#333F55',
        'border-opacity': 1,
    },
    colors: {
        primary: '#763EBD',
        secondary: '#95CFD5',
        lightprimary: '#26153C',
        lightsecondary: '#09454B',
        lightsuccess: '#1B3C48',
        lighterror: '#4B313D',
        lightwarning: '#4D3A2A',
        lightinfo:'#223662',
        textPrimary: '#EAEFF4',
        textSecondary: '#7C8FAC',
        borderColor: '#333F55',
        inputBorder: '#465670',
        containerBg: '#171c23',
        background: '#192838',
        surface: '#152332',
        hoverColor: '#333f55',
        'on-surface-variant': '#171c23',
        grey100: '#333F55',
        grey200: '#465670'
    }
};

const DARK_GREEN_THEME: ThemeTypes = {
    name: 'DARK_GREEN_THEME',
    dark: true,
    variables: {
        'border-color': '#333F55',
        'border-opacity': 1,
    },
    colors: {
        primary: '#0A7EA4',
        secondary: '#CCDA4E',
        lightprimary: '#05313F',
        lightsecondary: '#282917',
        lightsuccess: '#1B3C48',
        lighterror: '#4B313D',
        lightwarning: '#4D3A2A',
        lightinfo:'#223662',
        textPrimary: '#EAEFF4',
        textSecondary: '#7C8FAC',
        borderColor: '#333F55',
        inputBorder: '#465670',
        containerBg: '#171c23',
        background: '#192838',
        surface: '#152332',
        hoverColor: '#333f55',
        'on-surface-variant': '#171c23',
        grey100: '#333F55',
        grey200: '#465670'
    }
};

const DARK_CYAN_THEME: ThemeTypes = {
    name: 'DARK_CYAN_THEME',
    dark: true,
    variables: {
        'border-color': '#333F55',
        'border-opacity': 1,
    },
    colors: {
        primary: '#01C0C8',
        secondary: '#FB9678',
        lightprimary: '#003638',
        lightsecondary: '#40241C',
        lightsuccess: '#1B3C48',
        lighterror: '#4B313D',
        lightwarning: '#4D3A2A',
        lightinfo:'#223662',
        textPrimary: '#EAEFF4',
        textSecondary: '#7C8FAC',
        borderColor: '#333F55',
        inputBorder: '#465670',
        containerBg: '#171c23',
        background: '#192838',
        surface: '#152332',
        hoverColor: '#333f55',
        'on-surface-variant': '#171c23',
        grey100: '#333F55',
        grey200: '#465670'
    }
};

const DARK_ORANGE_THEME: ThemeTypes = {
    name: 'DARK_ORANGE_THEME',
    dark: true,
    variables: {
        'border-color': '#333F55',
        'border-opacity': 1,
    },
    colors: {
        primary: '#FA896B',
        secondary: '#0074BA',
        lightprimary: '#402E32',
        lightsecondary: '#082E45',
        lightsuccess: '#1B3C48',
        lighterror: '#4B313D',
        lightwarning: '#4D3A2A',
        lightinfo:'#223662',
        textPrimary: '#EAEFF4',
        textSecondary: '#7C8FAC',
        borderColor: '#333F55',
        inputBorder: '#465670',
        containerBg: '#171c23',
        background: '#192838',
        surface: '#152332',
        hoverColor: '#333f55',
        'on-surface-variant': '#171c23',
        grey100: '#333F55',
        grey200: '#465670'
    }
};

export { DARK_BLUE_THEME, DARK_AQUA_THEME, DARK_ORANGE_THEME, DARK_PURPLE_THEME, DARK_GREEN_THEME, DARK_CYAN_THEME };