#378B7D Color

#378B7D is rgb(55, 139, 125) in RGB, hsl(170, 43%, 38%) in HSL, and about cmyk(60%, 0%, 10%, 45%) in CMYK. It has no registered color name of its own — the closest is Viridian (#40826D), clearly related but distinguishable side by side at ΔE 6.59. Black text is the more readable choice on this background.

#378B7D

HEX#378B7D

RGBrgb(55, 139, 125)

HSLhsl(170, 43%, 38%)

HSVhsv(170, 60%, 55%)

CMYKcmyk(60%, 0%, 10%, 45%)

OKLCHoklch(58.2% 0.084 180.5)

LABlab(52.51% -29.15 -0.47)

LCHlch(52.51% 29.16 180.93)

What #378B7D 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 #378B7D, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Viridian#40826DΔE 6.59 Illuminating Emerald#319177ΔE 7.72 Pine Green#01796FΔE 8.15 Teal Green#00827FΔE 8.32 Myrtle Green#317873ΔE 9.18 Dark Cyan#008B8BΔE 9.59

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

#378B7D Channel Values

How #378B7D breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 55 · G 139 · B 125	8-bit channels as sent to the display
HSL	H 170° · S 43% · L 38%	Easiest model for building lighter and darker variants
HSV	H 170° · S 60% · V 55%	Matches the picker in most design tools
CMYK	C 60% · M 0% · Y 10% · K 45%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	4.08:1 vs white · 5.15:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #378B7D 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.

Fails AAWhite text4.08:1AA normal AA large AAA normal

TextBlack text5.15:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #378B7D in the contrast checker.

Colors That Go With #378B7D

Pairings derived from color-wheel relationships. The complementary color sits opposite #378B7D; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #378B7D

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

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #378B7D.

How #378B7D 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#378B7D

Protanopia#81817D

Protanomaly#6B857D

Deuteranopia#77777F

Deuteranomaly#64807E

Tritanopia#3C8989

Tritanomaly#3A8A85

Achromatopsia#7E7E7E

Test a full palette in the color blindness simulator.

Using #378B7D in Code

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

CSS custom property--color-378b7d: #378B7D;

CSS backgroundbackground-color: #378B7D;

Tailwind configcolors: { 'color-378b7d': '#378B7D' }

SwiftUIColor(red: 0.216, green: 0.545, blue: 0.490)

Android XML<color name="color_378b7d">#378B7D</color>

SVG fillfill="#378B7D"

More Teal Colors

#378B7D sits in the teal family. These are its neighbours across that family's full range, each with its own breakdown.

002424 f5ffff 002a38 f0ffff 002d2e eefbfb 003333 ecfeff 003542 ecf7f9 003838 ebffff 006466 009999 00ebeb 0d1616 192929 24fbff 36747d 50bfe6 73a9c2 8dd9cc aec6cf ccffff

#378B7D Frequently Asked Questions

What color is #378B7D?

#378B7D is a dark teal — rgb(55, 139, 125) in RGB and hsl(170, 43%, 38%) in HSL. It carries no registered color name of its own; the closest named color is Viridian (#40826D), which is clearly related but distinguishable side by side at a CIE76 distance of 6.59.

What is the RGB value of #378B7D?

#378B7D is rgb(55, 139, 125) — red 55, green 139, and blue 125 on the 0-255 scale.

What is the CMYK value of #378B7D?

#378B7D converts to approximately cmyk(60%, 0%, 10%, 45%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #378B7D be black or white?

Black text is the more readable choice. #378B7D scores 4.08:1 against white and 5.15:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #378B7D as a CSS color keyword?

No. #378B7D 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 darkcyan (#008B8B) at a CIE76 distance of 9.59, which is clearly related but distinguishable side by side.

Open #378B7D in a Tool

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Keep exploring: every teal in the color library, the guide to shades of teal, or the full color library.