Campus
Open in tool →Institutional blue with a highlighter-amber accent — trustworthy for parents, lively enough for students.
Color
#172d40
#172d40
hex
#172d40rgb
rgb(23, 45, 64)hsl
hsl(208, 47%, 17%)oklch
oklch(0.289 0.045 246.2)Closest name: Eternal Darkness (#1c2841)Relative luminance 0.0243
Colors that go with #172d40
Dark Olive Green, Sienna and Slate Blue 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.
Dark Olive Green #556b2f
triadicshippedDark Olive Green completes a triad with #172d40 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #172d40 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Slate Blue #6a5acd
analogousshippedSlate Blue is #172d40's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
analogousshippedTeal is #172d40's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #172d40 in 14 real palettes, including Beach Hut and Wikipedia's brand system, as the supporting colour.
Blue #0000ff
shipped22 real palettes, including Monzo's brand system and Readymag's brand system put Blue beside #172d40, as the accent.
Blue Violet #8a2be2
shippedBlue Violet is paired with #172d40 in 5 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #172d40: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #172d40
Tints & shades
Harmonies
Contrast
| #172d40 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 14.13:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.49:1 | 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 #172d40 as the background.
Brands using this color
Palettes built around it
Open House
Open in tool →Steel blue for trust, warm gold for the sold moment — an approachable brokerage that still feels established.
Coastal
Open in tool →Sea-teal, sky and sand — bright without shouting; works for travel, wellness, and anything near water.
Lido
Open in tool →Pool blue, watermelon and sun on white — the poolside summer set; the deep teal text keeps it from going juvenile.
Beach Hut
Open in tool →Sea blue with sun-bleached yellow and a coral — striped-canvas summer, softened so it works on a screen.
Fonts for this mood
#172d40 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #172d40
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #172d40 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/172d40-9cadc4-df4e51-1f212d-e9f1f1?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