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
#233e8b
#233e8b
hex
#233e8brgb
rgb(35, 62, 139)hsl
hsl(224, 60%, 34%)oklch
oklch(0.391 0.132 265.9)Closest name: Cascade Twilight (#234893)Relative luminance 0.0567
Colors that go with #233e8b
Charcoal, Steel Blue and 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #233e8b: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #233e8b'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 CVS's brand system and Procter & Gamble's brand system put Blue beside #233e8b, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #233e8b: 4 real palettes, including Blue Mono and Peacock's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #233e8b in 12 real palettes, including Pepsi's brand system and Walgreens's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #233e8b: 15 real palettes, including Unilever's brand system and Warbyparker's brand system, as the accent.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #233e8b: 4 real palettes, including Nintendo's brand system and MLB's brand system, as the accent.
Midnight Blue #191970
shipped18 real palettes, including Fintech Trust and First Snow put Midnight Blue beside #233e8b, as that palette's text colour.
Real palettes that use #233e8b
Tints & shades
Harmonies
Contrast
| #233e8b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.84:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.13:1 | 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 #233e8b as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#233e8b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #233e8b
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 #233e8b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/233e8b-9ca2c4-df724e-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