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#818BB1 Color

#818BB1 is rgb(129, 139, 177) in RGB, hsl(228, 24%, 60%) in HSL, and about cmyk(27%, 21%, 0%, 31%) in CMYK. It has no registered color name of its own — the closest is Cool Gray (#8C92AC), clearly related but distinguishable side by side at ΔE 7.44. Black text is the more readable choice on this background.

#818BB1
HEX#818BB1
RGBrgb(129, 139, 177)
HSLhsl(228, 24%, 60%)
HSVhsv(228, 27%, 69%)
CMYKcmyk(27%, 21%, 0%, 31%)
OKLCHoklch(64.3% 0.058 273.2)
LABlab(58.09% 2.85 -21.39)
LCHlch(58.09% 21.58 277.60)

What #818BB1 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 #818BB1, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Cool Gray#8C92ACΔE 7.44Shadow Blue#778BA5ΔE 7.65Rhythm#777696ΔE 9.01Blue Bell#A2A2D0ΔE 10.99Glaucous#6082B6ΔE 12.01Light Slate Gray#778899ΔE 12.13

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

#818BB1 Channel Values

How #818BB1 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

ModelChannelsNotes
RGBR 129 · G 139 · B 1778-bit channels as sent to the display
HSLH 228° · S 24% · L 60%Easiest model for building lighter and darker variants
HSVH 228° · S 27% · V 69%Matches the picker in most design tools
CMYKC 27% · M 21% · Y 0% · K 31%Approximate ink mix; confirm with an ICC profile before printing
Luminance3.35:1 vs white · 6.26:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #818BB1 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 text3.35:1AA normal AA large AAA normal
TextBlack text6.26:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #818BB1 in the contrast checker.

Colors That Go With #818BB1

Pairings derived from color-wheel relationships. The complementary color sits opposite #818BB1; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#818BB1
Complementary
#B1A881
Analogous
#81A3B1
Analogous
#8F81B1
Triadic
#B1818A
Triadic
#8AB181
Split comp.
#B18F81
Split comp.
#A3B181

Tints & Shades of #818BB1

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

#9099BB
#A3AAC7
#B3B9D0
#C6CADC
#D6D9E6
#E9EBF1

Shades

#6773A2
#55608B
#464F72
#363D59
#272C3F
#171A26

Want a full 50-950 ramp with semantic roles? Generate design tokens from #818BB1.

How #818BB1 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#818BB1
Protanopia#8989B1
Protanomaly#868AB1
Deuteranopia#8888B1
Deuteranomaly#8589B1
Tritanopia#7B9191
Tritanomaly#7D8E9F
Achromatopsia#8C8C8C

Test a full palette in the color blindness simulator.

Using #818BB1 in Code

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

CSS custom property--color-818bb1: #818BB1;
CSS backgroundbackground-color: #818BB1;
Tailwind configcolors: { 'color-818bb1': '#818BB1' }
SwiftUIColor(red: 0.506, green: 0.545, blue: 0.694)
Android XML<color name="color_818bb1">#818BB1</color>
SVG fillfill="#818BB1"

More Blue Colors

#818BB1 sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#818BB1 Frequently Asked Questions

What color is #818BB1?

#818BB1 is a light blue — rgb(129, 139, 177) in RGB and hsl(228, 24%, 60%) in HSL. It carries no registered color name of its own; the closest named color is Cool Gray (#8C92AC), which is clearly related but distinguishable side by side at a CIE76 distance of 7.44.

What is the RGB value of #818BB1?

#818BB1 is rgb(129, 139, 177) — red 129, green 139, and blue 177 on the 0-255 scale.

What is the CMYK value of #818BB1?

#818BB1 converts to approximately cmyk(27%, 21%, 0%, 31%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #818BB1 be black or white?

Black text is the more readable choice. #818BB1 scores 3.35:1 against white and 6.26:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #818BB1 as a CSS color keyword?

No. #818BB1 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 lightslategray (#778899) at a CIE76 distance of 12.13, which is visibly different.

Open #818BB1 in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

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