Palettes / Colors / #263E59

#263E59 — Deep Muted Blue

#263E59 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 #263E59 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.

#263E59 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 #594126; it also sits naturally between #265859 and #282659. 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 24% · Blue 35%

Cyan 57% · Magenta 30% · Yellow 0% · Key 65%

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

Previews

CSS code for #263E59

.text { color: #263E59; }
.background { background-color: #263E59; }
.border { border: 3px solid #263E59; }
.text-rgb { color: rgb(38, 62, 89); }
.text-hsl { color: hsl(212, 40%, 25%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #263E59; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(38, 62, 89, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #263E59; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(38, 62, 89, 0.8); }

HTML: <p style="color:#263E59">Text here</p> · <div style="background-color:#263E59">Div content here</div>

Shades of #263E59

Tints of #263E59

Tones of #263E59

Color harmonies

Complementary — #594126:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #263E59: #FFFFFF.

Semi-transparent (opacity) text on #263E59

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 #263E59 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 #263E59 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

← #263E58  ·  #263E5A →

Frequently asked questions

What color is #263E59?

#263E59 is Deep Muted Blue, a blue color (RGB 38, 62, 89). Its closest standard named color is DarkSlateGray.

What is the RGB and HSL of #263E59?

#263E59 is RGB 38, 62, 89 — HSL 212°, 40%, 25% — CMYK 57%, 30%, 0%, 65%.

What colors go with #263E59?

Its complement is #594126; analogous partners are #265859 and #282659. It also appears in 6+ palettes in our collection.

Can I use #263E59 for text?

White text on #263E59 has a contrast ratio of 10.96:1 (passes WCAG AA); black text gives 1.92:1.