Palettes / Colors / #263151

#263151 — Deep Muted Blue

#263151 is a blue color we call Deep Muted Blue, closest to the named color DarkSlateGray (#2F4F4F). It belongs to the blue family.

Color name

Closest CSS keyword: darkslategray (#2F4F4F) — not an exact match. CSS darkslategray gives you #2F4F4F, a different color; use #263151 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.

#263151 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 #504526; it also sits naturally between #264550 and #302650. 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 15% · Green 19% · Blue 32%

Cyan 53% · Magenta 40% · Yellow 0% · Key 68%

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

Previews

CSS code for #263151

.text { color: #263151; }
.background { background-color: #263151; }
.border { border: 3px solid #263151; }
.text-rgb { color: rgb(38, 49, 81); }
.text-hsl { color: hsl(225, 36%, 23%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #263151; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(38, 49, 81, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #263151; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(38, 49, 81, 0.8); }

HTML: <p style="color:#263151">Text here</p> · <div style="background-color:#263151">Div content here</div>

Shades of #263151

Tints of #263151

Tones of #263151

Color harmonies

Complementary — #504526:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #263151: #FFFFFF.

Semi-transparent (opacity) text on #263151

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 #263151 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 #263151 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

← #263150  ·  #263152 →

Frequently asked questions

What color is #263151?

#263151 is Deep Muted Blue, a blue color (RGB 38, 49, 81). Its closest standard named color is DarkSlateGray.

What is the RGB and HSL of #263151?

#263151 is RGB 38, 49, 81 — HSL 225°, 36%, 23% — CMYK 53%, 40%, 0%, 68%.

What colors go with #263151?

Its complement is #504526; analogous partners are #264550 and #302650. It also appears in 6+ palettes in our collection.

Can I use #263151 for text?

White text on #263151 has a contrast ratio of 12.80:1 (passes WCAG AA); black text gives 1.64:1.