Interstellar Blue
#001155
Interstellar deep blue violet for calmer depth
About Interstellar Blue
I'm looking at Interstellar Blue on a dark monitor test: it feels like ink that refuses to go gray. It's deeper than the more storm-forward dark purples, but it doesn't collapse into near-black the way Alone in the Dark does. Compared to Dark Soul, it holds onto a clearer purple identity with a cooler, more deliberate blue lean, so it reads as Interstellar rather than "almost shadow."
In practice, I use it when I want dashboards and finance apps to feel structured, not murky: row dividers, focused data series, selected tab backgrounds, and secondary chart accents in fintech, trading UIs, and operations panels. It's my the one you reach for when a control needs to stay crisp against cool grays without taking on the bruised intensity of Dying Storm Blue. Pair it with slate neutrals and restrained blues.
Quirk: it won't behave well next to warm sand or cream tones. The blue undertone can turn slightly detached fast, and the purple starts to look dirty.
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Contrast checker
WCAG 2.1 contrast ratios. AA requires 4.5:1 for normal text, 3:1 for large. AAA requires 7:1 / 4.5:1.
On White #ffffff
On Gray 100 #f5f5f5
On Gray 900 #18181b
On Black #000000
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