Palettes / Colors / #4040BF

#4040BF — Muted Blue

#4040BF is a blue color we call Muted Blue, closest to the named color SlateBlue (#6A5ACD). It belongs to the blue family.

#4040BF 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 #BFBF40; it also sits naturally between #4080BF and #8040BF. 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 75%

Cyan 66% · Magenta 66% · Yellow 0% · Key 25%

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

Previews

CSS code for #4040BF

.text { color: #4040BF; }
.background { background-color: #4040BF; }
.border { border: 3px solid #4040BF; }
.text-rgb { color: rgb(64, 64, 191); }
.text-hsl { color: hsl(240, 50%, 50%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #4040BF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(64, 64, 191, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #4040BF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(64, 64, 191, 0.8); }

HTML: <p style="color:#4040BF">Text here</p> · <div style="background-color:#4040BF">Div content here</div>

Shades of #4040BF

Tints of #4040BF

Tones of #4040BF

Color harmonies

Complementary — #BFBF40:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #4040BF: #FFFFFF.

How #4040BF 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 #4040BF 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

← #4040BE  ·  #4040C0 →

Frequently asked questions

What color is #4040BF?

#4040BF is Muted Blue, a blue color (RGB 64, 64, 191). Its closest standard named color is SlateBlue.

What is the RGB and HSL of #4040BF?

#4040BF is RGB 64, 64, 191 — HSL 240°, 50%, 50% — CMYK 66%, 66%, 0%, 25%.

What colors go with #4040BF?

Its complement is #BFBF40; analogous partners are #4080BF and #8040BF. It also appears in 6+ palettes in our collection.

Can I use #4040BF for text?

White text on #4040BF has a contrast ratio of 7.77:1 (passes WCAG AA); black text gives 2.70:1.