Palettes / Colors / #307FBC

#307FBC — Blue

#307FBC is a blue color we call Blue, closest to the named color SteelBlue (#4682B4). It belongs to the blue family.

Color name

Closest CSS keyword: steelblue (#4682B4) — not an exact match. CSS steelblue gives you #4682B4, a different color; use #307FBC 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.

#307FBC 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 #BB6C30; it also sits naturally between #30BBB1 and #3039BB. 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 19% · Green 50% · Blue 74%

Cyan 74% · Magenta 32% · Yellow 0% · Key 26%

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

Previews

CSS code for #307FBC

.text { color: #307FBC; }
.background { background-color: #307FBC; }
.border { border: 3px solid #307FBC; }
.text-rgb { color: rgb(48, 127, 188); }
.text-hsl { color: hsl(206, 59%, 46%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #307FBC; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(48, 127, 188, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #307FBC; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(48, 127, 188, 0.8); }

HTML: <p style="color:#307FBC">Text here</p> · <div style="background-color:#307FBC">Div content here</div>

Shades of #307FBC

Tints of #307FBC

Tones of #307FBC

Color harmonies

Complementary — #BB6C30:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #307FBC: #000000.

Semi-transparent (opacity) text on #307FBC

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 #307FBC 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 #307FBC 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

← #307FBB  ·  #307FBD →

Frequently asked questions

What color is #307FBC?

#307FBC is Blue, a blue color (RGB 48, 127, 188). Its closest standard named color is SteelBlue.

What is the RGB and HSL of #307FBC?

#307FBC is RGB 48, 127, 188 — HSL 206°, 59%, 46% — CMYK 74%, 32%, 0%, 26%.

What colors go with #307FBC?

Its complement is #BB6C30; analogous partners are #30BBB1 and #3039BB. It also appears in 6+ palettes in our collection.

Can I use #307FBC for text?

Black text on #307FBC has a contrast ratio of 4.89:1 (passes WCAG AA); white text gives 4.30:1.