#577FC8

sRGB · 87 / 127 / 200

#577FC8 belongs to the azure family. Its hex code tells a screen to mix 87 red, 127 green and 200 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 218.8° lands in the azure region. Its 50.7% saturation makes it partway between gray and the most vivid version of this hue at this lightness. HSL lightness is 56.3% 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 (5.28:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 87, 127, 200
HSL: 218.76°, 50.67%, 56.27%
HSV / HSB: 218.76°, 56.50%, 78.43%
CMYK (approx.): 56.50%, 36.50%, 0.00%, 21.57%
CIE XYZ (D65, Y = 100 for white): 21.944, 21.374, 57.615
CIELAB (D65, 2° observer): 53.357, 7.782, -42.174
WCAG relative luminance: 0.21375
24-bit decimal: 5734344

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 #577FC8 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 · 5.28:1

Normal text: AA
Large text: AAA

White text · 3.98:1

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

#C8A057 sits half a turn (180°) from #577FC8 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.

#577FC8 #C8A057

Analogous

#57B8C8 and #6757C8 sit 30° to either side of #577FC8. 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.

#57B8C8 #577FC8 #6757C8

Triadic

#577FC8, #C8577F and #7FC857 are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#577FC8 #C8577F #7FC857

Split complementary

Start at #577FC8 and look across the wheel. #C86757 and #B8C857 sit 30° to either side of its exact opposite, giving you two different accent choices.

#577FC8 #C86757 #B8C857

Square

Starting with #577FC8, each quarter turn (90°) takes you to the next hue: #C857B8, #C8A057, then #57C867. Across the square, #577FC8 pairs with #C8A057, and #C857B8 with #57C867.

#577FC8 #C857B8 #C8A057 #57C867

Tetradic

#577FC8 and #C8A057 are opposites, as are #A057C8 and #7FC857. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#577FC8 #A057C8 #C8A057 #7FC857

Tints

Mixing #577FC8 with white in 20% steps produces this scale. The first mixture, #7999D3, keeps 80% of the original. By #DDE5F4, the mixture is 80% white.

#577FC8 #7999D3 #9AB2DE #BCCCE9 #DDE5F4 #FFFFFF

Shades

Mixing #577FC8 with black in 20% steps produces this scale. The first mixture, #4666A0, keeps 80% of the original. By #111928, the mixture is 80% black.

#577FC8 #4666A0 #344C78 #233350 #111928 #000000

Tones

Mixing #577FC8 with middle gray in 20% steps produces this scale. The first mixture, #5F7FBA, keeps 80% of the original. By #78808E, the mixture is 80% middle gray.

#577FC8 #5F7FBA #677FAB #70809D #78808E #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

#577FC8

RGB

rgb(87 127 200)

HSL

hsl(218.761 50.673% 56.275%)

CSS example

.color-sample {
  background-color: #577FC8;
  color: #000000;
}

Channel breakdown

RGB

#577FC8 uses 87 red, 127 green and 200 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 34.1%

Green 49.8%

Blue 78.4%

CMYK

A simple CMYK estimate for #577FC8 is 56.5% cyan, 36.5% magenta, 0.0% yellow and 21.6% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 56.5%

Magenta 36.5%

Yellow 0.0%

Black 21.6%

Nearby colors

The nearest shorthand match is #5577CC. Its matching digit pairs let you write it as #57C in CSS. For a modern design, keep #577FC8 when you want an exact match. Use its web-safe neighbor, #6666CC, when matching a legacy palette of 216 colors.

Nearest shorthand · #5577CC Nearest web-safe · #6666CC

Gradient to complement

#577FC8 #6A85B5 #7D8AA2 #909090 #A2957D #B59B6A #C8A057

Color vision previews

Compare how #577FC8 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.

#6185CB

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.

#537BC6

Tritanopia

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

#008F9A

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.

#5D82C9

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.

#557DC7

Tritanomaly (50%)

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

#4E84B9

Grayscale (luminance)

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

#7F7F7F

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.

#6E7FA9

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 0.09531 G 0.21223 B 0.57758

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 0.37508 G 0.49380 B 0.76293

Linear Display P3

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

R 0.11607 G 0.20835 B 0.54289

CIE xyY

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

x 0.217 y 0.212 Y 21.374

CMY

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

C % 65.882 M % 50.196 Y % 21.569

Binary RGB

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

01010111 01111111 11001000