#178AB4#178AB4

#178AB4 is a mid, moderate cyan. Relative luminance 0.217; OKLCH L 59.4% C 0.113 H 229.7°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#178AB4
RGB	rgb(23, 138, 180)
HSL	hsl(196, 77%, 40%)
HSV	hsv(196, 87%, 71%)
CMYK	cmyk(87.2%, 23.3%, 0%, 29.4%)
CIE-LAB	lab(53.66, -14.84, -30.43)
CIE-LCH	lch(53.66, 33.85, 244.00°)
OKLab	oklab(59.4% -0.0728 -0.0858)
OKLCH	oklch(59.4% 0.113 229.7)
XYZ	xyz(17.6766, 21.6521, 46.4188)
Luminance	0.2165 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#178AB4 #B44117

analogous

#17B490 #178AB4 #173BB4

triadic

#178AB4 #B4178A #8AB417

tetradic

#178AB4 #9017B4 #B44117 #3BB417

square

#178AB4 #9017B4 #B44117 #3BB417

split-complementary

#178AB4 #B4173B #B49017

monochromatic

#093747 #10607E #178AB4 #25B0E3 #5BC4EA

Accessibility & contrast

On white

3.94

#178AB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#178AB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #178AB4

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##178AB4	#FFFFFF	#000000	##000000
##178AB4	1.00	3.94	5.33	5.33
#FFFFFF	3.94	1.00	21.00	21.00
#000000	5.33	21.00	1.00	1.00
##000000	5.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7488B6

Deuteranopia (green-blind)

#607AB3

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #178ab4;
/* rgb */ color: rgb(23, 138, 180);
/* oklch */ color: oklch(59.4% 0.113 229.7);

Tailwind

colors: {
  custom: {
    50: '#74acca',
    500: '#178ab4',
    950: '#000000',
  },
}

SCSS

$custom: #178ab4;
$custom-light: #74acca;
$custom-dark: #000000;

JSON

{
  "hex": "#178ab4",
  "rgb": {
    "r": 23,
    "g": 138,
    "b": 180
  },
  "hsl": {
    "h": 196.051,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.594,
    "c": 0.11254,
    "h": 229.7
  },
  "luminance": 0.21654
}

Semantic roles & 50–950 ramp

primary

#178AB4

secondary

#CE7859

accent

#6734F4

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #178AB4

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

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