Palettes / Colors / #15507A

#15507A — Blue

#15507A is a blue color we call 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 #15507A 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.

#15507A is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.

Its strongest partner is its complement #7A3F15; it also sits naturally between #157A72 and #151D7A. 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 8% · Green 31% · Blue 48%

Cyan 83% · Magenta 34% · Yellow 0% · Key 52%

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

Previews

CSS code for #15507A

.text { color: #15507A; }
.background { background-color: #15507A; }
.border { border: 3px solid #15507A; }
.text-rgb { color: rgb(21, 80, 122); }
.text-hsl { color: hsl(205, 71%, 28%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #15507A; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(21, 80, 122, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #15507A; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(21, 80, 122, 0.8); }

HTML: <p style="color:#15507A">Text here</p> · <div style="background-color:#15507A">Div content here</div>

Shades of #15507A

Tints of #15507A

Tones of #15507A

Color harmonies

Complementary — #7A3F15:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #15507A: #FFFFFF.

Semi-transparent (opacity) text on #15507A

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 #15507A 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 #15507A 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

← #155079  ·  #15507B →

Frequently asked questions

What color is #15507A?

#15507A is Blue, a blue color (RGB 21, 80, 122). Its closest standard named color is DarkSlateGray.

What is the RGB and HSL of #15507A?

#15507A is RGB 21, 80, 122 — HSL 205°, 71%, 28% — CMYK 83%, 34%, 0%, 52%.

What colors go with #15507A?

Its complement is #7A3F15; analogous partners are #157A72 and #151D7A. It also appears in 6+ palettes in our collection.

Can I use #15507A for text?

White text on #15507A has a contrast ratio of 8.54:1 (passes WCAG AA); black text gives 2.46:1.