Color Picker Examples and Reference

Default Color Picker

An example of a default Color Picker without any extra properties.

library(dash)
library(dashDaq)
library(dashHtmlComponents)

app <- Dash$new()

app$layout(htmlDiv(list(
  daqColorPicker(id = 'my-color-picker',
                 label = 'Color Picker',
                 value = '#119DFF'),
  htmlDiv(id = 'color-picker-output')
)))

app$callback(
  output(id = 'color-picker-output', property = 'children'),
  params = list(input(id = 'my-color-picker', property = 'value')),

  update_output <- function(value) {
    return (sprintf('The selected color is %s.', value))
  }
)

app$run_server()

Size

Set the size (width) of the color picker in pixels using the size property.

library(dashDaq)

daqColorPicker(
  label = 'Small',
  size = 164)

Label

Define the label and label position using the label and labelPosition properties.

library(dashDaq)

daqColorPicker(
  label = "Label",
  labelPosition = "bottom"
)

Disabled

To disable the Color Picker set disabled to TRUE.

library(dashDaq)

daqColorPicker(
  label = "Color Picker",
  disabled = TRUE
)

Hex Colors

Use hex values with the Color Picker by setting value=list(hex='#<hex_color>')

library(dashDaq)

daqColorPicker(
  label = "Color Picker",
  value = list(hex = "#0000FF")
)

RGB Colors

Use RGB color values with the Color Picker by setting:
value = list(rgb = list(r = <r_value>, g = <g_value>, b = <b_value>, a = <a_value>))

library(dashDaq)

daqColorPicker(
  label = "Color Picker",
  value = list(rgb = list(r = 255, g = 0, b = 0, a = 0))
)

ColorPicker Properties

Our recommended IDE for writing Dash apps is Dash Enterprise’s
Data Science Workspaces,
which has typeahead support for Dash Component Properties.
Find out if your company is using
Dash Enterprise.

id (character; optional):
The ID used to identify the color picker in Dash callbacks.

value (named list; optional):
Color value of the picker.

value is a named list with keys:

hex (character; optional):
Hex string.
rbg (named list; optional):
RGB/RGBA object.

rbg is a named list with keys:
- a (numeric; optional)
- b (numeric; optional)
- g (numeric; optional)
- r (numeric; optional)

disabled (logical; optional):
If TRUE, color cannot be picked.

size (numeric; default 225):
Size (width) of the component in pixels.

theme (named list; default light):
Theme configuration to be set by a ThemeProvider.

label (named list; optional):
Description to be displayed alongside the control. To control styling,
pass an object with label and style properties.

label is a character | named list with keys:

label (character; optional)
style (named list; optional)

labelPosition (a value equal to: ‘top’ or ‘bottom’; default 'top'):
Where the indicator label is positioned.

className (character; optional):
Class to apply to the root component element.

style (named list; optional):
Style to apply to the root component element.

persistence (logical | character | numeric; optional):
Used to allow user interactions in this component to be persisted when
the component - or the page - is refreshed. If persisted is truthy
and hasn’t changed from its previous value, a value that the user
has changed while using the app will keep that change, as long as the
new value also matches what was given originally. Used in
conjunction with persistence_type.

persisted_props (unnamed list of values equal to: ‘value’; default ['value']):
Properties whose user interactions will persist after refreshing the
component or the page. Since only value is allowed this prop can
normally be ignored.

persistence_type (a value equal to: ‘local’, ‘session’ or ‘memory’; default 'local'):
Where persisted user changes will be stored: memory: only kept in
memory, reset on page refresh. local: window.localStorage, data is
kept after the browser quit. session: window.sessionStorage, data is
cleared once the browser quit.