Palettes / Colors / #1D3557

#1D3557 — Deep Muted Blue

#1D3557 is a blue color we call Deep Muted Blue, closest to the named color DarkSlateGray (#2F4F4F). It belongs to the blue family.

#1D3557 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 #58401D; it also sits naturally between #1D5358 and #221D58. In the palettes below you can see it working alongside real color combinations from our collection.

Copy HEX Copy RGB Copy HSL Download PNG swatch SVG

Color values

RGB & CMYK percentages

Red 11% · Green 21% · Blue 34%

Cyan 67% · Magenta 39% · Yellow 0% · Key 66%

Previews

CSS code for #1D3557

.text { color: #1D3557; }
.background { background-color: #1D3557; }
.border { border: 3px solid #1D3557; }
.text-rgb { color: rgb(29, 53, 87); }
.text-hsl { color: hsl(215, 50%, 23%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #1D3557; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(29, 53, 87, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #1D3557; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(29, 53, 87, 0.8); }

HTML: <p style="color:#1D3557">Text here</p> · <div style="background-color:#1D3557">Div content here</div>

Shades of #1D3557

Tints of #1D3557

Tones of #1D3557

Color harmonies

Complementary — #58401D:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #1D3557: #FFFFFF.

How #1D3557 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 #1D3557 or a close neighbour

Similar colors

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

Browse neighbouring colors

← #1D3556  ·  #1D3558 →

Frequently asked questions

What color is #1D3557?

#1D3557 is Deep Muted Blue, a blue color (RGB 29, 53, 87). Its closest standard named color is DarkSlateGray.

What is the RGB and HSL of #1D3557?

#1D3557 is RGB 29, 53, 87 — HSL 215°, 50%, 23% — CMYK 67%, 39%, 0%, 66%.

What colors go with #1D3557?

Its complement is #58401D; analogous partners are #1D5358 and #221D58. It also appears in 6+ palettes in our collection.

Can I use #1D3557 for text?

White text on #1D3557 has a contrast ratio of 12.36:1 (passes WCAG AA); black text gives 1.70:1.