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#646A7D Color

#646A7D is rgb(100, 106, 125) in RGB, hsl(226, 11%, 44%) in HSL, and about cmyk(20%, 15%, 0%, 51%) in CMYK. It has no registered color name of its own — the closest is Black Coral (#54626F), clearly related but distinguishable side by side at ΔE 6.16. White text is the more readable choice on this background.

#646A7D
HEX#646A7D
RGBrgb(100, 106, 125)
HSLhsl(226, 11%, 44%)
HSVhsv(226, 20%, 49%)
CMYKcmyk(20%, 15%, 0%, 51%)
OKLCHoklch(52.6% 0.031 271.5)
LABlab(44.82% 0.92 -11.44)
LCHlch(44.82% 11.47 274.57)

What #646A7D 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 #646A7D, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Black Coral#54626FΔE 6.16Dark Electric Blue#536878ΔE 6.31Cadet#536872ΔE 8.11Slate Gray#708090ΔE 8.96Rhythm#777696ΔE 9.55Old Lavender#796878ΔE 9.85

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

#646A7D Channel Values

How #646A7D 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 100 · G 106 · B 1258-bit channels as sent to the display
HSLH 226° · S 11% · L 44%Easiest model for building lighter and darker variants
HSVH 226° · S 20% · V 49%Matches the picker in most design tools
CMYKC 20% · M 15% · Y 0% · K 51%Approximate ink mix; confirm with an ICC profile before printing
Luminance5.39:1 vs white · 3.9:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #646A7D 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 text5.39:1AA normal AA large AAA normal
Fails AABlack text3.9:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #646A7D in the contrast checker.

Colors That Go With #646A7D

Pairings derived from color-wheel relationships. The complementary color sits opposite #646A7D; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#646A7D
Complementary
#7D7764
Analogous
#64767D
Analogous
#6A647D
Triadic
#7D646A
Triadic
#6A7D64
Split comp.
#7D6A64
Split comp.
#767D64

Tints & Shades of #646A7D

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

#777D92
#8B90A2
#A2A6B4
#B8BCC6
#CFD1D8
#E3E4E8

Shades

#565B6C
#4B4F5D
#3D414C
#30323B
#22242A
#17181C

Want a full 50-950 ramp with semantic roles? Generate design tokens from #646A7D.

How #646A7D 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#646A7D
Protanopia#69697D
Protanomaly#67697D
Deuteranopia#68687D
Deuteranomaly#66697D
Tritanopia#616D6D
Tritanomaly#626C74
Achromatopsia#6A6A6A

Test a full palette in the color blindness simulator.

Using #646A7D in Code

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

CSS custom property--color-646a7d: #646A7D;
CSS backgroundbackground-color: #646A7D;
Tailwind configcolors: { 'color-646a7d': '#646A7D' }
SwiftUIColor(red: 0.392, green: 0.416, blue: 0.490)
Android XML<color name="color_646a7d">#646A7D</color>
SVG fillfill="#646A7D"

More Blue Colors

#646A7D sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#646A7D Frequently Asked Questions

What color is #646A7D?

#646A7D is a mid-tone blue — rgb(100, 106, 125) in RGB and hsl(226, 11%, 44%) in HSL. It carries no registered color name of its own; the closest named color is Black Coral (#54626F), which is clearly related but distinguishable side by side at a CIE76 distance of 6.16.

What is the RGB value of #646A7D?

#646A7D is rgb(100, 106, 125) — red 100, green 106, and blue 125 on the 0-255 scale.

What is the CMYK value of #646A7D?

#646A7D converts to approximately cmyk(20%, 15%, 0%, 51%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #646A7D be black or white?

White text is the more readable choice. #646A7D scores 5.39:1 against white and 3.9:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #646A7D as a CSS color keyword?

No. #646A7D 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 slategray (#708090) at a CIE76 distance of 8.96, which is clearly related but distinguishable side by side.

Open #646A7D 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.