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#42407D Color

#42407D is rgb(66, 64, 125) in RGB, hsl(242, 32%, 37%) in HSL, and about cmyk(47%, 49%, 0%, 51%) in CMYK. It has no registered color name of its own — the closest is Cyber Grape (#58427C), clearly related but distinguishable side by side at ΔE 8.08. White text is the more readable choice on this background.

#42407D
HEX#42407D
RGBrgb(66, 64, 125)
HSLhsl(242, 32%, 37%)
HSVhsv(242, 49%, 49%)
CMYKcmyk(47%, 49%, 0%, 51%)
OKLCHoklch(40.5% 0.1 282.4)
LABlab(29.74% 14.21 -34.98)
LCHlch(29.74% 37.76 292.11)

What #42407D 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 #42407D, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Cyber Grape#58427CΔE 8.08Ultra Violet#5F4B8BΔE 8.95Dark Slate Blue#483D8BΔE 10.6Purple Navy#4E5180ΔE 11.47Yinmn Blue#2E5090ΔE 11.6Amethyst (Crayola)#64609AΔE 13.85

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

#42407D Channel Values

How #42407D 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 64 · B 1258-bit channels as sent to the display
HSLH 242° · S 32% · L 37%Easiest model for building lighter and darker variants
HSVH 242° · S 49% · V 49%Matches the picker in most design tools
CMYKC 47% · M 49% · Y 0% · K 51%Approximate ink mix; confirm with an ICC profile before printing
Luminance9.29:1 vs white · 2.26:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #42407D 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 text9.29:1AA normal AA large AAA normal
Fails AABlack text2.26:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #42407D in the contrast checker.

Colors That Go With #42407D

Pairings derived from color-wheel relationships. The complementary color sits opposite #42407D; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#42407D
Complementary
#7B7D40
Analogous
#405C7D
Analogous
#60407D
Triadic
#7D4240
Triadic
#407D42
Split comp.
#7D6040
Split comp.
#5C7D40

Tints & Shades of #42407D

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

#52509B
#6764AF
#8482BF
#A2A1CE
#C0BFDE
#DBDAEC

Shades

#39376C
#32315E
#29284D
#201F3D
#17172C
#10101E

Want a full 50-950 ramp with semantic roles? Generate design tokens from #42407D.

How #42407D 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#42407D
Protanopia#40407D
Protanomaly#41407D
Deuteranopia#41417D
Deuteranomaly#41407D
Tritanopia#344B4B
Tritanomaly#3A4763
Achromatopsia#474747

Test a full palette in the color blindness simulator.

Using #42407D in Code

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

CSS custom property--color-42407d: #42407D;
CSS backgroundbackground-color: #42407D;
Tailwind configcolors: { 'color-42407d': '#42407D' }
SwiftUIColor(red: 0.259, green: 0.251, blue: 0.490)
Android XML<color name="color_42407d">#42407D</color>
SVG fillfill="#42407D"

More Blue Colors

#42407D sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#42407D Frequently Asked Questions

What color is #42407D?

#42407D is a dark blue — rgb(66, 64, 125) in RGB and hsl(242, 32%, 37%) in HSL. It carries no registered color name of its own; the closest named color is Cyber Grape (#58427C), which is clearly related but distinguishable side by side at a CIE76 distance of 8.08.

What is the RGB value of #42407D?

#42407D is rgb(66, 64, 125) — red 66, green 64, and blue 125 on the 0-255 scale.

What is the CMYK value of #42407D?

#42407D converts to approximately cmyk(47%, 49%, 0%, 51%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #42407D be black or white?

White text is the more readable choice. #42407D scores 9.29:1 against white and 2.26:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #42407D as a CSS color keyword?

No. #42407D 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 10.6, which is visibly different.

Open #42407D 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.