#178C9D#178C9D

#178C9D is a mid, moderate teal. Relative luminance 0.214; OKLCH L 58.9% C 0.097 H 210.4°. Best body text is #000000 at 5.27:1 contrast (WCAG AA passes).

Color values

HEX	#178C9D
RGB	rgb(23, 140, 157)
HSL	hsl(188, 74%, 35%)
HSV	hsv(188, 85%, 62%)
CMYK	cmyk(85.4%, 10.8%, 0%, 38.4%)
CIE-LAB	lab(53.35, -23.93, -17.67)
CIE-LCH	lch(53.35, 29.74, 216.44°)
OKLab	oklab(58.85% -0.0839 -0.0493)
OKLCH	oklch(58.85% 0.097 210.4)
XYZ	xyz(15.8146, 21.3706, 35.1832)
Luminance	0.2137 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#178C9D #9D2817

analogous

#179D6B #178C9D #17499D

triadic

#178C9D #9D178C #8C9D17

tetradic

#178C9D #6B179D #9D2817 #499D17

square

#178C9D #6B179D #9D2817 #499D17

split-complementary

#178C9D #9D1749 #9D6B17

monochromatic

#072D32 #0F5C68 #178C9D #1FBCD2 #4AD1E4

Accessibility & contrast

On white

3.98

#178C9D on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.27

#178C9D on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #178C9D

5.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##178C9D	#FFFFFF	#000000	##000000
##178C9D	1.00	3.98	5.27	5.27
#FFFFFF	3.98	1.00	21.00	21.00
#000000	5.27	21.00	1.00	1.00
##000000	5.27	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E879E

Deuteranopia (green-blind)

#6D7A9D

Tritanopia (blue-blind)

#009391

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #178c9d;
/* rgb */ color: rgb(23, 140, 157);
/* oklch */ color: oklch(58.9% 0.097 210.4);

Tailwind

colors: {
  custom: {
    50: '#70aeba',
    500: '#178c9d',
    950: '#000000',
  },
}

SCSS

$custom: #178c9d;
$custom-light: #70aeba;
$custom-dark: #000000;

JSON

{
  "hex": "#178c9d",
  "rgb": {
    "r": 23,
    "g": 140,
    "b": 157
  },
  "hsl": {
    "h": 187.612,
    "s": 74.444,
    "l": 35.294
  },
  "oklch": {
    "l": 0.5885,
    "c": 0.0973,
    "h": 210.4
  },
  "luminance": 0.21373
}

Semantic roles & 50–950 ramp

primary

#178C9D

secondary

#C65A4A

accent

#4E37F1

background

#F7FAFB

surface

#EDF4F6

border

#C8CED0

text

#091011

muted

#7B7F80

Preview Lab

Preview with #178C9D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →