Named color
Royal Neptune
#1c3b42rgb(28, 59, 66)hsl(191, 40%, 18%)oklch(0.332 0.039 214.1)Royal Neptune on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 1 public brand that uses it and the palettes it appears in.
Colors that go with Royal Neptune
Sienna, Steel Blue and Teal 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.
Sienna #a0522d
complementaryshippedSienna sits directly opposite Royal Neptune on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Steel Blue #4682b4
analogousshippedSteel Blue is Royal Neptune'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 Royal Neptune'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 Royal Neptune in 5 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour.
Blue #0000ff
shipped13 real palettes, including Jeep's brand system and Minecraft's brand system put Blue beside Royal Neptune, as the accent.
Blush Pink #e8b4b8
shipped5 real palettes, including Rain Garden and Garden Wedding put Blush Pink beside Royal Neptune, as the accent.
Burlywood #deb887
shippedBurlywood is paired with Royal Neptune in 4 real palettes, including Polaroid and Coastal, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for Royal Neptune: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use Royal Neptune
Tints & shades
Harmonies
Contrast
| Royal Neptune as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.98:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.75:1 | 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 Royal Neptune as the background.
Brands using this color
Fonts for this mood
Royal Neptune reads as cool, dark, luxury. 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 #1c3b42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/1c3b42-a2b6be-df4e7a-1f252d-e9f1ef?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