Indigo hex code
Indigo
#4b0082rgb(75, 0, 130)hsl(275, 100%, 25%)oklch(0.339 0.179 301.7)Indigo is a very dark, highly saturated violet — #4b0082, rgb(75, 0, 130), hue 275° at 100% saturation. The colours that go with indigo are Olive Green, Charcoal and Crimson — each with the reason below, and the real palettes that pair them. As text it passes WCAG AA on white at 12.95:1, so it can be a body colour, not just a fill.
Colors that go with Indigo
Olive Green, Charcoal and Crimson lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Olive Green #808000
complementaryOlive Green sits directly opposite Indigo on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for Indigo: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with Indigo in 3 real palettes, including Casper Sleep's brand system and Pepsi's brand system, as the lead colour.
Royal Blue #4169e1
analogousshippedRoyal Blue is Indigo's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
triadicshippedTeal completes a triad with Indigo — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
split-complementSea Green is a split-complement of Indigo: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with Indigo: two real palettes: Zillow's brand system and Purina Pro Plan's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with Indigo: two real palettes: Slack's brand system and Hinge's brand system, as the lead colour.
Real palettes that use Indigo
Tints & shades
Harmonies
Contrast
| Indigo as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.95:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.62:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with Indigo as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
Indigo reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #4b0082 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/4b0082-b89cc4-c0cb62-2d1f2d-eae9f1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md