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#423181 Color

#423181 is rgb(66, 49, 129) in RGB, hsl(253, 45%, 35%) in HSL, and about cmyk(49%, 62%, 0%, 49%) in CMYK. It has no registered color name of its own — the closest is Dark Slate Blue (#483D8B), clearly related but distinguishable side by side at ΔE 5.36. White text is the more readable choice on this background.

#423181
HEX#423181
RGBrgb(66, 49, 129)
HSLhsl(253, 45%, 35%)
HSVhsv(253, 62%, 51%)
CMYKcmyk(49%, 62%, 0%, 49%)
OKLCHoklch(37.9% 0.129 288.5)
LABlab(25.99% 24.54 -43.48)
LCHlch(25.99% 49.92 299.44)

What #423181 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 #423181, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Dark Slate Blue#483D8BΔE 5.36St. Patrick's Blue#23297AΔE 8.09Spanish Violet#4C2882ΔE 8.27Cosmic Cobalt#2E2D88ΔE 8.68KSU Purple#512888ΔE 11.27Midnight Blue#191970ΔE 13.4

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

#423181 Channel Values

How #423181 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 66 · G 49 · B 1298-bit channels as sent to the display
HSLH 253° · S 45% · L 35%Easiest model for building lighter and darker variants
HSVH 253° · S 62% · V 51%Matches the picker in most design tools
CMYKC 49% · M 62% · Y 0% · K 49%Approximate ink mix; confirm with an ICC profile before printing
Luminance10.56:1 vs white · 1.99:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #423181 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 text10.56:1AA normal AA large AAA normal
Fails AABlack text1.99:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #423181 in the contrast checker.

Colors That Go With #423181

Pairings derived from color-wheel relationships. The complementary color sits opposite #423181; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#423181
Complementary
#708131
Analogous
#314881
Analogous
#6B3181
Triadic
#814231
Triadic
#318142
Split comp.
#816B31
Split comp.
#488131

Tints & Shades of #423181

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

#543EA3
#6951BD
#8572CA
#A294D6
#BFB5E3
#DCD6F0

Shades

#3B2B73
#312460
#2A1F51
#20183F
#191230
#0F0B1E

Want a full 50-950 ramp with semantic roles? Generate design tokens from #423181.

How #423181 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#423181
Protanopia#343481
Protanomaly#3A3381
Deuteranopia#373781
Deuteranomaly#3C3581
Tritanopia#314242
Tritanomaly#383C61
Achromatopsia#3F3F3F

Test a full palette in the color blindness simulator.

Using #423181 in Code

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

CSS custom property--color-423181: #423181;
CSS backgroundbackground-color: #423181;
Tailwind configcolors: { 'color-423181': '#423181' }
SwiftUIColor(red: 0.259, green: 0.192, blue: 0.506)
Android XML<color name="color_423181">#423181</color>
SVG fillfill="#423181"

More Blue Colors

#423181 sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#423181 Frequently Asked Questions

What color is #423181?

#423181 is a dark blue — rgb(66, 49, 129) in RGB and hsl(253, 45%, 35%) in HSL. It carries no registered color name of its own; the closest named color is Dark Slate Blue (#483D8B), which is clearly related but distinguishable side by side at a CIE76 distance of 5.36.

What is the RGB value of #423181?

#423181 is rgb(66, 49, 129) — red 66, green 49, and blue 129 on the 0-255 scale.

What is the CMYK value of #423181?

#423181 converts to approximately cmyk(49%, 62%, 0%, 49%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #423181 be black or white?

White text is the more readable choice. #423181 scores 10.56:1 against white and 1.99:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #423181 as a CSS color keyword?

No. #423181 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 darkslateblue (#483D8B) at a CIE76 distance of 5.36, which is clearly related but distinguishable side by side.

Open #423181 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.