#287CBA

sRGB · 40 / 124 / 186

#287CBA belongs to the azure family. Its hex code tells a screen to mix 40 red, 124 green and 186 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 205.5° lands in the azure region. Its 64.6% saturation makes it partway between gray and the most vivid version of this hue at this lightness. HSL lightness is 44.3% on a scale from black (0%) to white (100%). Of black and white lettering, black has the clearer light-to-dark separation on this background (4.68:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 40, 124, 186
HSL: 205.48°, 64.60%, 44.31%
HSV / HSB: 205.48°, 78.49%, 72.94%
CMYK (approx.): 78.49%, 33.33%, 0.00%, 27.06%
CIE XYZ (D65, Y = 100 for white): 16.944, 18.411, 49.117
CIELAB (D65, 2° observer): 49.990, -3.035, -39.599
WCAG relative luminance: 0.18412
24-bit decimal: 2653370

CMYK uses a profile-free approximation. Printed output depends on the press, ink and paper. Lab uses a D65 white point.

Text contrast

Contrast tells you how clearly lettering separates from #287CBA in light and dark. The ratio compares relative luminance, a measure of light weighted for human vision. Identical colors give 1:1 and black against white gives 21:1. A ratio of 2.99:1 falls just below the 3:1 AA minimum for large text. Body text needs at least 4.5:1 because its finer strokes are harder to distinguish.

Black text · 4.68:1

Normal text: AA
Large text: AAA

White text · 4.48:1

Normal text: Fail
Large text: AA

AA and AAA are WCAG accessibility levels. AAA sets a higher bar: 7:1 for normal text and 4.5:1 for large text. Large text begins at 18 pt regular or 14 pt bold. Ratings use the unrounded ratio. WCAG text contrast guidance

Palettes & scales

Harmonies rotate the hue. Scales mix the starting color with white, black or middle gray in 20% steps in encoded sRGB.

Complementary

#BA6628 sits half a turn (180°) from #287CBA on the HSL wheel. Keeping saturation and lightness steady while crossing to the opposite hue gives you a contrasting accent. Check text contrast separately before using the pair for lettering.

#287CBA #BA6628

Analogous

#28BAAF and #2833BA sit 30° to either side of #287CBA. The three hues are neighbors on the wheel, so you can change the color of a border or highlight while keeping it close to the original.

#28BAAF #287CBA #2833BA

Triadic

#287CBA, #BA287C and #7CBA28 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#287CBA #BA287C #7CBA28

Split complementary

Start at #287CBA and look across the wheel. #BA2833 and #BAAF28 sit 30° to either side of its exact opposite, giving you two different accent choices.

#287CBA #BA2833 #BAAF28

Square

Starting with #287CBA, each quarter turn (90°) takes you to the next hue: #AF28BA, #BA6628, then #33BA28. Across the square, #287CBA pairs with #BA6628, and #AF28BA with #33BA28.

#287CBA #AF28BA #BA6628 #33BA28

Tetradic

#287CBA and #BA6628 are opposites, as are #6628BA and #7CBA28. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#287CBA #6628BA #BA6628 #7CBA28

Tints

Mixing #287CBA with white in 20% steps produces this scale. The first mixture, #5396C8, keeps 80% of the original. By #D4E5F1, the mixture is 80% white.

#287CBA #5396C8 #7EB0D6 #A9CBE3 #D4E5F1 #FFFFFF

Shades

Mixing #287CBA with black in 20% steps produces this scale. The first mixture, #206395, keeps 80% of the original. By #081925, the mixture is 80% black.

#287CBA #206395 #184A70 #10324A #081925 #000000

Tones

Mixing #287CBA with middle gray in 20% steps produces this scale. The first mixture, #3A7DAE, keeps 80% of the original. By #6E7F8C, the mixture is 80% middle gray.

#287CBA #3A7DAE #4B7EA3 #5D7E97 #6E7F8C #808080

Copy color codes

Hex, RGB and HSL are three ways to write this screen color. Paste any of them into a CSS color property.

Hex

#287CBA

RGB

rgb(40 124 186)

HSL

hsl(205.479 64.602% 44.314%)

CSS example

.color-sample {
  background-color: #287CBA;
  color: #000000;
}

Channel breakdown

RGB

#287CBA uses 40 red, 124 green and 186 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 15.7%

Green 48.6%

Blue 72.9%

CMYK

A simple CMYK estimate for #287CBA is 78.5% cyan, 33.3% magenta, 0.0% yellow and 27.1% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 78.5%

Magenta 33.3%

Yellow 0.0%

Black 27.1%

Nearby colors

The nearest shorthand match is #2277BB. Its matching digit pairs let you write it as #27B in CSS. For a modern design, keep #287CBA when you want an exact match. Use its web-safe neighbor, #3366CC, when matching a legacy palette of 216 colors.

Nearest shorthand · #2277BB Nearest web-safe · #3366CC

Gradient to complement

#287CBA #4078A2 #597589 #717171 #896D59 #A26A40 #BA6628

Color vision previews

Compare how #287CBA appears in each simulation. When two chart lines or status indicators become hard to tell apart, a label, shape or line pattern gives readers another way to distinguish them. Individual perception varies.

Protanopia

A red–green color vision deficiency. Without a distinct response from long-wavelength cones, some reds and greens can look alike, and reds can appear darker.

#5F7EBD

Deuteranopia

A red–green color vision deficiency. Without a distinct response from medium-wavelength cones, some greens can be difficult to distinguish from reds or browns.

#4A71B9

Tritanopia

A blue–yellow color vision deficiency. Without a distinct response from short-wavelength cones, blue can resemble green, and yellow can resemble pink.

#008B92

Protanomaly (50%)

An altered long-wavelength cone response can make reds appear dimmer and harder to distinguish from greens. This swatch shows the model’s halfway setting.

#4F7CBB

Deuteranomaly (50%)

An altered medium-wavelength cone response can reduce the visible difference between reds and greens. This swatch shows the model’s halfway setting.

#4475B9

Tritanomaly (50%)

An altered short-wavelength cone response can make blue harder to distinguish from green. This swatch shows the model’s halfway setting.

#1080AD

Grayscale (luminance)

This design check removes hue and preserves relative luminance so you can compare light and dark areas.

#777777

Partial grayscale (50% blend)

This design check mixes the original color halfway toward its grayscale equivalent in linear light. Use it to see how a design holds up as color fades.

#5A799D

Technical reference

CAM16 and CIECAM02 below assume D65 white, an average surround, background Y of 20 against white at 100, and adapting luminance of 4.07 cd/m².

Linear sRGB

These channels scale with emitted light. Use them for lighting calculations and physically meaningful blends.

R 0.02122 G 0.20156 B 0.49102

Display P3

P3 displays can reproduce a wider range of reds and greens. These coordinates reproduce this same sRGB swatch on a color-managed P3 display.

R 0.25582 G 0.47952 B 0.70978

Linear Display P3

These P3 channels are proportional to light, before display encoding.

R 0.05324 G 0.19557 B 0.46204

CIE xyY

The x and y coordinates locate chromaticity on a diagram. Y gives relative luminance on a scale where white is 100.

x 0.201 y 0.218 Y 18.411

CMY

Ideal cyan, magenta and yellow are the complements of the encoded red, green and blue channels.

C % 84.314 M % 51.373 Y % 27.059

Binary RGB

Each eight-bit group represents one channel. Together they store the 24-bit hex color.

00101000 01111100 10111010