Glacier
Open in tool →Three blues from ice to deep water on a pale surface — a monochromatic winter set with real depth.
Color
#03005b
#03005b
hex
#03005brgb
rgb(3, 0, 91)hsl
hsl(242, 100%, 18%)oklch
oklch(0.215 0.146 265.9)Closest name: Ravenclaw (#0a0555)Relative luminance 0.0077
Colors that go with #03005b
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 #03005b: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #03005b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shippedBlue is paired with #03005b in 4 real palettes, including Penpot's brand system and Monzo's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #03005b in 6 real palettes, including Glacier and Blue Mono, as the accent — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #03005b in 4 real palettes, including Deep Water and Twilio's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #03005b in 6 real palettes, including Paramount+'s brand system and Bank of America's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #03005b in 6 real palettes, including Penpot's brand system and GEICO's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Slate Gray #708090
shippedSlate Gray is paired with #03005b in 4 real palettes, including Clinic and Slate Workspace, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #03005b
Tints & shades
Harmonies
Contrast
| #03005b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 18.18:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.15:1 | 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 #03005b as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#03005b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #03005b
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 #03005b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/03005b-a29cc4-df9e4e-261f2d-e9edf1?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