Palettes / Colors / #304591

#304591 — Muted Blue

#304591 is a blue color we call Muted Blue, closest to the named color DarkSlateBlue (#483D8B). It belongs to the blue family.

Color name

Closest CSS keyword: darkslateblue (#483D8B) — not an exact match. CSS darkslateblue gives you #483D8B, a different color; use #304591 when you need this exact shade.

Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.

#304591 is a cool blue color associated with trust, calm and professionalism. It sits comfortably in the middle: usable for large areas in soft schemes, or as a supporting color beside something stronger.

Its strongest partner is its complement #917C30; it also sits naturally between #307691 and #4C3091. In the palettes below you can see it working alongside real color combinations from our collection.

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Color values

RGB & CMYK percentages

Red 19% · Green 27% · Blue 57%

Cyan 67% · Magenta 52% · Yellow 0% · Key 43%

CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.

Previews

CSS code for #304591

.text { color: #304591; }
.background { background-color: #304591; }
.border { border: 3px solid #304591; }
.text-rgb { color: rgb(48, 69, 145); }
.text-hsl { color: hsl(227, 50%, 38%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #304591; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(48, 69, 145, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #304591; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(48, 69, 145, 0.8); }

HTML: <p style="color:#304591">Text here</p> · <div style="background-color:#304591">Div content here</div>

Shades of #304591

Tints of #304591

Tones of #304591

Color harmonies

Complementary — #917C30:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #304591: #FFFFFF.

Semi-transparent (opacity) text on #304591

Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:

How #304591 looks with color blindness

Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:

Closest design-system colors

The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:

Palettes with a similar color

These palettes use a close neighbour of #304591 rather than the exact color:

Similar colors

The closest colors that actually appear in our palette collection — click any to open its page:

Browse neighbouring colors

← #304590  ·  #304592 →

Frequently asked questions

What color is #304591?

#304591 is Muted Blue, a blue color (RGB 48, 69, 145). Its closest standard named color is DarkSlateBlue.

What is the RGB and HSL of #304591?

#304591 is RGB 48, 69, 145 — HSL 227°, 50%, 38% — CMYK 67%, 52%, 0%, 43%.

What colors go with #304591?

Its complement is #917C30; analogous partners are #307691 and #4C3091. It also appears in 6+ palettes in our collection.

Can I use #304591 for text?

White text on #304591 has a contrast ratio of 8.80:1 (passes WCAG AA); black text gives 2.39:1.