Palettes / Colors / #313BBF

#313BBF — Blue

#313BBF is a blue color we call 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 #313BBF 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.

#313BBF 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 #BFB531; it also sits naturally between #3181BF and #6E31BF. 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 19% · Green 23% · Blue 75%

Cyan 74% · Magenta 69% · Yellow 0% · Key 25%

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

Previews

CSS code for #313BBF

.text { color: #313BBF; }
.background { background-color: #313BBF; }
.border { border: 3px solid #313BBF; }
.text-rgb { color: rgb(49, 59, 191); }
.text-hsl { color: hsl(236, 59%, 47%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #313BBF; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(49, 59, 191, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #313BBF; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(49, 59, 191, 0.8); }

HTML: <p style="color:#313BBF">Text here</p> · <div style="background-color:#313BBF">Div content here</div>

Shades of #313BBF

Tints of #313BBF

Tones of #313BBF

Color harmonies

Complementary — #BFB531:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #313BBF: #FFFFFF.

Semi-transparent (opacity) text on #313BBF

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 #313BBF 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 #313BBF 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

← #313BBE  ·  #313BC0 →

Frequently asked questions

What color is #313BBF?

#313BBF is Blue, a blue color (RGB 49, 59, 191). Its closest standard named color is DarkSlateBlue.

What is the RGB and HSL of #313BBF?

#313BBF is RGB 49, 59, 191 — HSL 236°, 59%, 47% — CMYK 74%, 69%, 0%, 25%.

What colors go with #313BBF?

Its complement is #BFB531; analogous partners are #3181BF and #6E31BF. It also appears in 6+ palettes in our collection.

Can I use #313BBF for text?

White text on #313BBF has a contrast ratio of 8.37:1 (passes WCAG AA); black text gives 2.51:1.