Palettes / Colors / #287C9B

#287C9B — Blue

#287C9B 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 #287C9B 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.

#287C9B 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 #9A4628; it also sits naturally between #289A7F and #28429A. 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 16% · Green 49% · Blue 61%

Cyan 74% · Magenta 20% · Yellow 0% · Key 39%

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

Previews

CSS code for #287C9B

.text { color: #287C9B; }
.background { background-color: #287C9B; }
.border { border: 3px solid #287C9B; }
.text-rgb { color: rgb(40, 124, 155); }
.text-hsl { color: hsl(196, 59%, 38%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #287C9B; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(40, 124, 155, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #287C9B; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(40, 124, 155, 0.8); }

HTML: <p style="color:#287C9B">Text here</p> · <div style="background-color:#287C9B">Div content here</div>

Shades of #287C9B

Tints of #287C9B

Tones of #287C9B

Color harmonies

Complementary — #9A4628:

Analogous:

Triadic:

Contrast & accessibility

Best text color on #287C9B: #FFFFFF.

Semi-transparent (opacity) text on #287C9B

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 #287C9B 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 #287C9B 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

← #287C9A  ·  #287C9C →

Frequently asked questions

What color is #287C9B?

#287C9B is Blue, a blue color (RGB 40, 124, 155). Its closest standard named color is SteelBlue.

What is the RGB and HSL of #287C9B?

#287C9B is RGB 40, 124, 155 — HSL 196°, 59%, 38% — CMYK 74%, 20%, 0%, 39%.

What colors go with #287C9B?

Its complement is #9A4628; analogous partners are #289A7F and #28429A. It also appears in 6+ palettes in our collection.

Can I use #287C9B for text?

White text on #287C9B has a contrast ratio of 4.72:1 (passes WCAG AA); black text gives 4.45:1.