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#181981 Color

#181981 is rgb(24, 25, 129) in RGB, hsl(239, 69%, 30%) in HSL, and about cmyk(81%, 81%, 0%, 49%) in CMYK. It has no registered color name of its own — the closest is Resolution Blue (#002387), clearly related but distinguishable side by side at ΔE 6.23. White text is the more readable choice on this background.

#181981
HEX#181981
RGBrgb(24, 25, 129)
HSLhsl(239, 69%, 30%)
HSVhsv(239, 81%, 51%)
CMYKcmyk(81%, 81%, 0%, 49%)
OKLCHoklch(30.8% 0.166 270.8)
LABlab(16.66% 31.07 -58.94)
LCHlch(16.66% 66.63 297.80)

What #181981 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 #181981, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Resolution Blue#002387ΔE 6.23Persian Indigo#32127AΔE 7.31Imperial Blue#002395ΔE 7.66Midnight Blue#191970ΔE 9.68Samsung Blue#12279EΔE 10.17Phthalo Blue#000F89ΔE 10.45

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

#181981 Channel Values

How #181981 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 24 · G 25 · B 1298-bit channels as sent to the display
HSLH 239° · S 69% · L 30%Easiest model for building lighter and darker variants
HSVH 239° · S 81% · V 51%Matches the picker in most design tools
CMYKC 81% · M 81% · Y 0% · K 49%Approximate ink mix; confirm with an ICC profile before printing
Luminance14.05:1 vs white · 1.49:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #181981 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.

TextWhite text14.05:1AA normal AA large AAA normal
Fails AABlack text1.49:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #181981 in the contrast checker.

Colors That Go With #181981

Pairings derived from color-wheel relationships. The complementary color sits opposite #181981; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#181981
Complementary
#818018
Analogous
#184E81
Analogous
#4B1881
Triadic
#811819
Triadic
#198118
Split comp.
#814B18
Split comp.
#4E8118

Tints & Shades of #181981

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

#2022AC
#272AD3
#4E51DF
#797BE6
#A5A6EE
#CBCCF6

Shades

#151670
#121463
#0F1052
#0C0D41
#09092F
#060722

Want a full 50-950 ramp with semantic roles? Generate design tokens from #181981.

How #181981 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#181981
Protanopia#191981
Protanomaly#191981
Deuteranopia#191981
Deuteranomaly#181981
Tritanopia#003535
Tritanomaly#002C5D
Achromatopsia#2C2C2C

Test a full palette in the color blindness simulator.

Using #181981 in Code

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

CSS custom property--color-181981: #181981;
CSS backgroundbackground-color: #181981;
Tailwind configcolors: { 'color-181981': '#181981' }
SwiftUIColor(red: 0.094, green: 0.098, blue: 0.506)
Android XML<color name="color_181981">#181981</color>
SVG fillfill="#181981"

More Blue Colors

#181981 sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#181981 Frequently Asked Questions

What color is #181981?

#181981 is a dark blue — rgb(24, 25, 129) in RGB and hsl(239, 69%, 30%) in HSL. It carries no registered color name of its own; the closest named color is Resolution Blue (#002387), which is clearly related but distinguishable side by side at a CIE76 distance of 6.23.

What is the RGB value of #181981?

#181981 is rgb(24, 25, 129) — red 24, green 25, and blue 129 on the 0-255 scale.

What is the CMYK value of #181981?

#181981 converts to approximately cmyk(81%, 81%, 0%, 49%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #181981 be black or white?

White text is the more readable choice. #181981 scores 14.05:1 against white and 1.49:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #181981 as a CSS color keyword?

No. #181981 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 midnightblue (#191970) at a CIE76 distance of 9.68, which is clearly related but distinguishable side by side.

Open #181981 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.