Palettes / Colors / #40407B

#40407B — Muted Blue

#40407B 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 #40407B 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.

#40407B 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 #7D7D40; it also sits naturally between #405E7D and #5E407D. 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 25% · Green 25% · Blue 48%

Cyan 48% · Magenta 48% · Yellow 0% · Key 52%

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

Previews

CSS code for #40407B

.text { color: #40407B; }
.background { background-color: #40407B; }
.border { border: 3px solid #40407B; }
.text-rgb { color: rgb(64, 64, 123); }
.text-hsl { color: hsl(240, 32%, 37%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #40407B; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(64, 64, 123, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #40407B; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(64, 64, 123, 0.8); }

HTML: <p style="color:#40407B">Text here</p> · <div style="background-color:#40407B">Div content here</div>

Shades of #40407B

Tints of #40407B

Tones of #40407B

Color harmonies

Complementary — #7D7D40:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #40407B: #FFFFFF.

Semi-transparent (opacity) text on #40407B

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 #40407B 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 #40407B 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

← #40407A  ·  #40407C →

Frequently asked questions

What color is #40407B?

#40407B is Muted Blue, a blue color (RGB 64, 64, 123). Its closest standard named color is DarkSlateBlue.

What is the RGB and HSL of #40407B?

#40407B is RGB 64, 64, 123 — HSL 240°, 32%, 37% — CMYK 48%, 48%, 0%, 52%.

What colors go with #40407B?

Its complement is #7D7D40; analogous partners are #405E7D and #5E407D. It also appears in 6+ palettes in our collection.

Can I use #40407B for text?

White text on #40407B has a contrast ratio of 9.39:1 (passes WCAG AA); black text gives 2.24:1.