Sapphire & Gold
Open in tool →Deep sapphire and gold with a teal — old-money jewel tones on an ivory ground; heraldic without a crest.
Color
#283c81
#283c81
hex
#283c81rgb
rgb(40, 60, 129)hsl
hsl(227, 53%, 33%)oklch
oklch(0.381 0.119 268.1)Closest name: Evening Magic (#363e7d)Relative luminance 0.0527
Colors that go with #283c81
Steel Blue, Blue 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.
Steel Blue #4682b4
analogousshippedSteel Blue is #283c81's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped5 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #283c81, as the accent.
Crimson #dc143c
shippedCrimson is paired with #283c81 in 9 real palettes, including Casper Sleep's brand system and Pepsi's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #283c81: 15 real palettes, including Hasbro's brand system and Unilever's brand system, as the supporting colour.
Orange Red #ff4500
shippedOrange Red is paired with #283c81 in 5 real palettes, including NASA's brand system and Tide's brand system, as the supporting colour.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #283c81: 4 real palettes, including Glacier and First Snow, as the supporting colour.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #283c81 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #283c81: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #283c81
Tints & shades
Harmonies
Contrast
| #283c81 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.23:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.05:1 | 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 #283c81 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#283c81 reads as cool, modern. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #283c81
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 #283c81 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/283c81-9ca0c4-df7a4e-221f2d-e9eff1?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