#EFF9FA

sRGB: 239 / 249 / 250

Infinite horizons reshape eternity
Unbridled forces cascade across forgotten valleys
Celestial symphonies illuminate hidden worlds

#EFF9FA belongs to the cyan family. Its hex code tells a screen to mix 239 red, 249 green and 250 blue on a scale of 0 to 255. On the HSL wheel, hue is a position around a circle: 185.5° lands in the cyan region. Its 52.4% saturation makes it partway between gray and the most vivid version of this hue at this lightness. HSL lightness is 95.9% 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 (19.60:1), which helps the shapes of letters stand out.

Color conversions

sRGB (8-bit): 239, 249, 250
HSL: 185.45°, 52.38%, 95.88%
HSV / HSB: 185.45°, 4.40%, 98.04%
CMYK (approx.): 4.40%, 0.40%, 0.00%, 1.96%
CIE XYZ (D65, Y = 100 for white): 86.723, 93.004, 103.828
CIELAB (D65, 2° observer): 97.229, -3.098, -1.620
WCAG relative luminance: 0.93004
24-bit decimal: 15727098

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 #EFF9FA 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: 19.60:1

Normal text: AAA
Large text: AAA

White text: 1.07:1

Normal text: Fail
Large text: Fail

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.

Reference: 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

#FAF0EF sits half a turn (180°) from #EFF9FA 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.

#EFF9FA #FAF0EF

Analogous

#EFFAF6 and #EFF3FA sit 30° to either side of #EFF9FA. 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.

#EFFAF6 #EFF9FA #EFF3FA

Triadic

#EFF9FA, #FAEFF9 and #F9FAEF are spaced 120° apart, forming a triangle on the wheel. Try one for the main color and the other two for accents.

#EFF9FA #FAEFF9 #F9FAEF

Split complementary

Start at #EFF9FA and look across the wheel. #FAEFF3 and #FAF6EF sit 30° to either side of its exact opposite, giving you two different accent choices.

#EFF9FA #FAEFF3 #FAF6EF

Square

Starting with #EFF9FA, each quarter turn (90°) takes you to the next hue: #F6EFFA, #FAF0EF, then #F3FAEF. Across the square, #EFF9FA pairs with #FAF0EF, and #F6EFFA with #F3FAEF.

#EFF9FA #F6EFFA #FAF0EF #F3FAEF

Tetradic

#EFF9FA and #FAF0EF are opposites, as are #F0EFFA and #F9FAEF. Together they form a rectangle on the wheel, with alternating gaps of 60° and 120°.

#EFF9FA #F0EFFA #FAF0EF #F9FAEF

Tints

Mixing #EFF9FA with white in 20% steps produces this scale. The first mixture, #F2FAFB, keeps 80% of the original. By #FCFEFE, the mixture is 80% white.

#EFF9FA #F2FAFB #F5FBFC #F9FDFD #FCFEFE #FFFFFF

Shades

Mixing #EFF9FA with black in 20% steps produces this scale. The first mixture, #BFC7C8, keeps 80% of the original. By #303232, the mixture is 80% black.

#EFF9FA #BFC7C8 #8F9596 #606464 #303232 #000000

Tones

Mixing #EFF9FA with middle gray in 20% steps produces this scale. The first mixture, #D9E1E2, keeps 80% of the original. By #969898, the mixture is 80% middle gray.

#EFF9FA #D9E1E2 #C3C9C9 #ACB0B1 #969898 #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

#EFF9FA

RGB

rgb(239 249 250)

HSL

hsl(185.455 52.381% 95.882%)

CSS example

.color-sample {
  background-color: #EFF9FA;
  color: #000000;
}

Channel breakdown

RGB

#EFF9FA uses 239 red, 249 green and 250 blue. Each bar shows how much of that channel’s 0–255 range the screen uses.

Red 93.7%

Green 97.6%

Blue 98.0%

CMYK

A simple CMYK estimate for #EFF9FA is 4.4% cyan, 0.4% magenta, 0.0% yellow and 2.0% black. These are ink amounts; a printer profile is needed to predict the result on paper.

Cyan 4.4%

Magenta 0.4%

Yellow 0.0%

Black 2.0%

Nearby colors

The nearest shorthand match is #EEFFFF. Its matching digit pairs let you write it as #EFF in CSS. For a modern design, keep #EFF9FA when you want an exact match. Use its web-safe neighbor, #FFFFFF, when matching a legacy palette of 216 colors.

Nearest shorthand: #EEFFFF Nearest web-safe: #FFFFFF

Gradient to complement

#EFF9FA #F1F8F8 #F3F6F6 #F5F5F5 #F6F3F3 #F8F2F1 #FAF0EF

Color vision previews

Compare how #EFF9FA 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.

#F7F8FA

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.

#F5F6FA

Tritanopia

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

#ECFAF9

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.

#F4F8FA

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.

#F3F7FA

Tritanomaly (50%)

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

#EFF9FA

Grayscale (luminance)

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

#F7F7F7

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.

#F3F8F9

Reference: National Eye Institute: Types of Color Vision Deficiency

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 0.86316 G 0.94731 B 0.95597

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 0.94438 G 0.97520 B 0.97939

Linear Display P3

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

R 0.87810 G 0.94451 B 0.95376

CIE xyY

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

x 0.306 y 0.328 Y 93.004

CMY

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

C % 6.275 M % 2.353 Y % 1.961

Binary RGB

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

11101111 11111001 11111010