""" Bar Chart with Negative Values ============================== This example shows a bar chart with both positive and negative values. """ # category: bar charts import altair as alt from vega_datasets import data source = data.us_employment() alt.Chart(source).mark_bar().encode( x="month:T", y="nonfarm_change:Q", color=alt.condition( alt.datum.nonfarm_change > 0, alt.value("steelblue"), # The positive color alt.value("orange") # The negative color ) ).properties(width=600)