#EFF5FB Color

#EFF5FB is rgb(239, 245, 251) in RGB, hsl(210, 60%, 96%) in HSL, and about cmyk(5%, 2%, 0%, 2%) in CMYK. It has no registered color name of its own — the closest is Alice Blue (#F0F8FF), below the threshold most people can see at ΔE 1.28. Black text is the more readable choice on this background.

#EFF5FB

HEX#EFF5FB

RGBrgb(239, 245, 251)

HSLhsl(210, 60%, 96%)

HSVhsv(210, 5%, 98%)

CMYKcmyk(5%, 2%, 0%, 2%)

OKLCHoklch(96.7% 0.01 247.9)

LABlab(96.21% -1.24 -3.62)

LCHlch(96.21% 3.83 251.10)

What #EFF5FB Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #EFF5FB, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Alice Blue#F0F8FFΔE 1.28 Ghost White#F8F8FFΔE 2.66 Cloud#EFF1FEΔE 3.83 Cultured#F5F5F5ΔE 3.84 Zinc White#FDF8FFΔE 4.41 Azure#F0FFFFΔE 5.02

Browse the full index of named colors A-Z or every blue in the library.

#EFF5FB Channel Values

How #EFF5FB breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 239 · G 245 · B 251	8-bit channels as sent to the display
HSL	H 210° · S 60% · L 96%	Easiest model for building lighter and darker variants
HSV	H 210° · S 5% · V 98%	Matches the picker in most design tools
CMYK	C 5% · M 2% · Y 0% · K 2%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	1.1:1 vs white · 19.12:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #EFF5FB background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

Fails AAWhite text1.1:1AA normal AA large AAA normal

TextBlack text19.12:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #EFF5FB in the contrast checker.

Colors That Go With #EFF5FB

Pairings derived from color-wheel relationships. The complementary color sits opposite #EFF5FB; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #EFF5FB

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

#EFF5FB

#F3F7FC

#F7FAFD

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #EFF5FB.

How #EFF5FB Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#EFF5FB

Protanopia#F4F4FB

Protanomaly#F2F4FB

Deuteranopia#F3F3FB

Deuteranomaly#F1F4FB

Tritanopia#EEF6F6

Tritanomaly#EFF5F8

Achromatopsia#F4F4F4

Test a full palette in the color blindness simulator.

Using #EFF5FB in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-eff5fb: #EFF5FB;

CSS backgroundbackground-color: #EFF5FB;

Tailwind configcolors: { 'color-eff5fb': '#EFF5FB' }

SwiftUIColor(red: 0.937, green: 0.961, blue: 0.984)

Android XML<color name="color_eff5fb">#EFF5FB</color>

SVG fillfill="#EFF5FB"

More Blue Colors

#EFF5FB sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024 fafaff 00002e f9fafb 000033 f8fafc 000038 f8f8ff 000042 f5faff 000047 f5f5ff 002147 007dfa 0f52ba 1c39bb 2a3439 372aac 4e3cc3 64609a 7abdff 979aaa b8dbff d6d6ff

#EFF5FB Frequently Asked Questions

What color is #EFF5FB?

#EFF5FB is a lightest blue — rgb(239, 245, 251) in RGB and hsl(210, 60%, 96%) in HSL. It carries no registered color name of its own; the closest named color is Alice Blue (#F0F8FF), which is below the threshold most people can see at a CIE76 distance of 1.28.

What is the RGB value of #EFF5FB?

#EFF5FB is rgb(239, 245, 251) — red 239, green 245, and blue 251 on the 0-255 scale.

What is the CMYK value of #EFF5FB?

#EFF5FB converts to approximately cmyk(5%, 2%, 0%, 2%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #EFF5FB be black or white?

Black text is the more readable choice. #EFF5FB scores 1.1:1 against white and 19.12:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #EFF5FB as a CSS color keyword?

No. #EFF5FB is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is aliceblue (#F0F8FF) at a CIE76 distance of 1.28, which is below the threshold most people can see.

Open #EFF5FB in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every blue in the color library, the guide to shades of blue, or the full color library.