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#55738B Color

#55738B is rgb(85, 115, 139) in RGB, hsl(207, 24%, 44%) in HSL, and about cmyk(39%, 17%, 0%, 45%) in CMYK. It has no registered color name of its own — the closest is Dark Electric Blue (#536878), clearly related but distinguishable side by side at ΔE 6.71. White text is the more readable choice on this background.

#55738B
HEX#55738B
RGBrgb(85, 115, 139)
HSLhsl(207, 24%, 44%)
HSVhsv(207, 39%, 55%)
CMYKcmyk(39%, 17%, 0%, 45%)
OKLCHoklch(54.2% 0.051 243)
LABlab(46.81% -6.35 -16.88)
LCHlch(46.81% 18.03 249.39)

What #55738B 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 #55738B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Dark Electric Blue#536878ΔE 6.71Slate Gray#708090ΔE 9.03Cadet#536872ΔE 9.51Air Force Blue#5D8AA8ΔE 9.88Black Coral#54626FΔE 10.25Teal Blue#367588ΔE 10.26

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

#55738B Channel Values

How #55738B 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 85 · G 115 · B 1398-bit channels as sent to the display
HSLH 207° · S 24% · L 44%Easiest model for building lighter and darker variants
HSVH 207° · S 39% · V 55%Matches the picker in most design tools
CMYKC 39% · M 17% · Y 0% · K 45%Approximate ink mix; confirm with an ICC profile before printing
Luminance4.99:1 vs white · 4.21:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #55738B 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 text4.99:1AA normal AA large AAA normal
Fails AABlack text4.21:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #55738B in the contrast checker.

Colors That Go With #55738B

Pairings derived from color-wheel relationships. The complementary color sits opposite #55738B; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#55738B
Complementary
#8B6E55
Analogous
#558B88
Analogous
#55588B
Triadic
#8B5573
Triadic
#738B55
Split comp.
#8B5558
Split comp.
#8B8855

Tints & Shades of #55738B

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

#6788A2
#7D99B0
#97ADBF
#B0C1CF
#C9D5DE
#DFE6EC

Shades

#4A6378
#405668
#344755
#293742
#1D272F
#131A20

Want a full 50-950 ramp with semantic roles? Generate design tokens from #55738B.

How #55738B 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#55738B
Protanopia#6F6F8B
Protanomaly#65708B
Deuteranopia#6A6A8C
Deuteranomaly#626E8B
Tritanopia#507676
Tritanomaly#52757F
Achromatopsia#707070

Test a full palette in the color blindness simulator.

Using #55738B in Code

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

CSS custom property--color-55738b: #55738B;
CSS backgroundbackground-color: #55738B;
Tailwind configcolors: { 'color-55738b': '#55738B' }
SwiftUIColor(red: 0.333, green: 0.451, blue: 0.545)
Android XML<color name="color_55738b">#55738B</color>
SVG fillfill="#55738B"

More Blue Colors

#55738B sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#55738B Frequently Asked Questions

What color is #55738B?

#55738B is a mid-tone blue — rgb(85, 115, 139) in RGB and hsl(207, 24%, 44%) in HSL. It carries no registered color name of its own; the closest named color is Dark Electric Blue (#536878), which is clearly related but distinguishable side by side at a CIE76 distance of 6.71.

What is the RGB value of #55738B?

#55738B is rgb(85, 115, 139) — red 85, green 115, and blue 139 on the 0-255 scale.

What is the CMYK value of #55738B?

#55738B converts to approximately cmyk(39%, 17%, 0%, 45%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #55738B be black or white?

White text is the more readable choice. #55738B scores 4.99:1 against white and 4.21:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #55738B as a CSS color keyword?

No. #55738B 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 9.03, which is clearly related but distinguishable side by side.

Open #55738B 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.