#178AA1#178AA1

#178AA1 is a mid, moderate cyan. Relative luminance 0.209; OKLCH L 58.5% C 0.099 H 215.8°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#178AA1
RGB	rgb(23, 138, 161)
HSL	hsl(190, 75%, 36%)
HSV	hsv(190, 86%, 63%)
CMYK	cmyk(85.7%, 14.3%, 0%, 36.9%)
CIE-LAB	lab(52.87, -21.53, -20.71)
CIE-LCH	lch(52.87, 29.87, 223.89°)
OKLab	oklab(58.51% -0.0803 -0.0579)
OKLCH	oklch(58.51% 0.099 215.8)
XYZ	xyz(15.8721, 20.9303, 36.9147)
Luminance	0.2093 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#178AA1 #A12E17

analogous

#17A173 #178AA1 #1745A1

triadic

#178AA1 #A1178A #8AA117

tetradic

#178AA1 #7317A1 #A12E17 #45A117

square

#178AA1 #7317A1 #A12E17 #45A117

split-complementary

#178AA1 #A11745 #A17317

monochromatic

#082E36 #0F5C6B #178AA1 #1FB8D7 #4DCCE6

Accessibility & contrast

On white

4.05

#178AA1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#178AA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #178AA1

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##178AA1	#FFFFFF	#000000	##000000
##178AA1	1.00	4.05	5.19	5.19
#FFFFFF	4.05	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A85A2

Deuteranopia (green-blind)

#6979A1

Tritanopia (blue-blind)

#009291

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #178aa1;
/* rgb */ color: rgb(23, 138, 161);
/* oklch */ color: oklch(58.5% 0.099 215.8);

Tailwind

colors: {
  custom: {
    50: '#70acbc',
    500: '#178aa1',
    950: '#000000',
  },
}

SCSS

$custom: #178aa1;
$custom-light: #70acbc;
$custom-dark: #000000;

JSON

{
  "hex": "#178aa1",
  "rgb": {
    "r": 23,
    "g": 138,
    "b": 161
  },
  "hsl": {
    "h": 190,
    "s": 75,
    "l": 36.078
  },
  "oklch": {
    "l": 0.58513,
    "c": 0.09898,
    "h": 215.8
  },
  "luminance": 0.20932
}

Semantic roles & 50–950 ramp

primary

#178AA1

secondary

#C7614C

accent

#5536F2

background

#F7FAFB

surface

#EDF4F6

border

#C8CED0

text

#091012

muted

#7B7F81

Preview Lab

Preview with #178AA1

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

Preview Lab → · Contrast checker → · Palette generator →