#178EB4#178EB4

#178EB4 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.4% C 0.111 H 226.4°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#178EB4
RGB	rgb(23, 142, 180)
HSL	hsl(195, 77%, 40%)
HSV	hsv(195, 87%, 71%)
CMYK	cmyk(87.2%, 21.1%, 0%, 29.4%)
CIE-LAB	lab(54.89, -17.04, -28.52)
CIE-LCH	lch(54.89, 33.22, 239.14°)
OKLab	oklab(60.39% -0.0765 -0.0802)
OKLCH	oklch(60.39% 0.111 226.4)
XYZ	xyz(18.2611, 22.8211, 46.6136)
Luminance	0.2282 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#178EB4 #B43D17

analogous

#17B48B #178EB4 #1740B4

triadic

#178EB4 #B4178E #8EB417

tetradic

#178EB4 #8B17B4 #B43D17 #40B417

square

#178EB4 #8B17B4 #B43D17 #40B417

split-complementary

#178EB4 #B41740 #B48B17

monochromatic

#093847 #10637E #178EB4 #25B5E3 #5BC8EA

Accessibility & contrast

On white

3.77

#178EB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#178EB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #178EB4

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##178EB4	#FFFFFF	#000000	##000000
##178EB4	1.00	3.77	5.56	5.56
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798BB6

Deuteranopia (green-blind)

#667DB4

Tritanopia (blue-blind)

#00999B

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #178eb4;
/* rgb */ color: rgb(23, 142, 180);
/* oklch */ color: oklch(60.4% 0.111 226.4);

Tailwind

colors: {
  custom: {
    50: '#74afca',
    500: '#178eb4',
    950: '#000000',
  },
}

SCSS

$custom: #178eb4;
$custom-light: #74afca;
$custom-dark: #000000;

JSON

{
  "hex": "#178eb4",
  "rgb": {
    "r": 23,
    "g": 142,
    "b": 180
  },
  "hsl": {
    "h": 194.522,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.60387,
    "c": 0.11087,
    "h": 226.4
  },
  "luminance": 0.22823
}

Semantic roles & 50–950 ramp

primary

#178EB4

secondary

#CE7559

accent

#6234F4

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #178EB4

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

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