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#637A7E Color

#637A7E is rgb(99, 122, 126) in RGB, hsl(189, 12%, 44%) in HSL, and about cmyk(21%, 3%, 0%, 51%) in CMYK. It has no registered color name of its own — the closest is Steel (#71797E), clearly related but distinguishable side by side at ΔE 5.87. Black text is the more readable choice on this background.

#637A7E
HEX#637A7E
RGBrgb(99, 122, 126)
HSLhsl(189, 12%, 44%)
HSVhsv(189, 21%, 49%)
CMYKcmyk(21%, 3%, 0%, 51%)
OKLCHoklch(56.3% 0.028 209.3)
LABlab(49.49% -7.97 -5.13)
LCHlch(49.49% 9.48 212.76)

What #637A7E 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 #637A7E, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Steel#71797EΔE 5.87Cadet#536872ΔE 7.83Slate Gray#708090ΔE 7.99Steel Teal#5F8A8FΔE 8.49Nickel#727472ΔE 9.14Deep Space Sparkle#4A646CΔE 9.38

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

#637A7E Channel Values

How #637A7E 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 99 · G 122 · B 1268-bit channels as sent to the display
HSLH 189° · S 12% · L 44%Easiest model for building lighter and darker variants
HSVH 189° · S 21% · V 49%Matches the picker in most design tools
CMYKC 21% · M 3% · Y 0% · K 51%Approximate ink mix; confirm with an ICC profile before printing
Luminance4.55:1 vs white · 4.62:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #637A7E 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 text4.55:1AA normal AA large AAA normal
TextBlack text4.62:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #637A7E in the contrast checker.

Colors That Go With #637A7E

Pairings derived from color-wheel relationships. The complementary color sits opposite #637A7E; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#637A7E
Complementary
#7E6763
Analogous
#637E74
Analogous
#636C7E
Triadic
#7E637A
Triadic
#7A7E63
Split comp.
#7E636C
Split comp.
#7E7463

Tints & Shades of #637A7E

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

#768F93
#8A9FA3
#A1B2B5
#B8C5C7
#CED7D9
#E2E8E9

Shades

#55696D
#4A5B5E
#3D4B4D
#2F3A3C
#22292B
#161C1D

Want a full 50-950 ramp with semantic roles? Generate design tokens from #637A7E.

How #637A7E 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#637A7E
Protanopia#76767E
Protanomaly#6F787E
Deuteranopia#73737F
Deuteranomaly#6D767E
Tritanopia#627B7B
Tritanomaly#637A7C
Achromatopsia#767676

Test a full palette in the color blindness simulator.

Using #637A7E in Code

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

CSS custom property--color-637a7e: #637A7E;
CSS backgroundbackground-color: #637A7E;
Tailwind configcolors: { 'color-637a7e': '#637A7E' }
SwiftUIColor(red: 0.388, green: 0.478, blue: 0.494)
Android XML<color name="color_637a7e">#637A7E</color>
SVG fillfill="#637A7E"

More Teal Colors

#637A7E sits in the teal family. These are its neighbours across that family's full range, each with its own breakdown.

002424f5ffff002a38f0ffff002d2eeefbfb003333ecfeff003542ecf7f9003838ebffff00646600999900ebeb0d161619292924fbff36747d50bfe673a9c28dd9ccaec6cfccffff

#637A7E Frequently Asked Questions

What color is #637A7E?

#637A7E is a mid-tone teal — rgb(99, 122, 126) in RGB and hsl(189, 12%, 44%) in HSL. It carries no registered color name of its own; the closest named color is Steel (#71797E), which is clearly related but distinguishable side by side at a CIE76 distance of 5.87.

What is the RGB value of #637A7E?

#637A7E is rgb(99, 122, 126) — red 99, green 122, and blue 126 on the 0-255 scale.

What is the CMYK value of #637A7E?

#637A7E converts to approximately cmyk(21%, 3%, 0%, 51%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #637A7E be black or white?

Black text is the more readable choice. #637A7E scores 4.55:1 against white and 4.62:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #637A7E as a CSS color keyword?

No. #637A7E 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 7.99, which is clearly related but distinguishable side by side.

Open #637A7E in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

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