#178BB4#178BB4

#178BB4 is a mid, moderate cyan. Relative luminance 0.219; OKLCH L 59.6% C 0.112 H 228.8°. Best body text is #000000 at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#178BB4
RGB	rgb(23, 139, 180)
HSL	hsl(196, 77%, 40%)
HSV	hsv(196, 87%, 71%)
CMYK	cmyk(87.2%, 22.8%, 0%, 29.4%)
CIE-LAB	lab(53.96, -15.39, -29.95)
CIE-LCH	lch(53.96, 33.67, 242.80°)
OKLab	oklab(59.65% -0.0738 -0.0844)
OKLCH	oklch(59.65% 0.112 228.8)
XYZ	xyz(17.8208, 21.9404, 46.4668)
Luminance	0.2194 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#178BB4 #B44017

analogous

#17B48F #178BB4 #173CB4

triadic

#178BB4 #B4178B #8BB417

tetradic

#178BB4 #8F17B4 #B44017 #3CB417

square

#178BB4 #8F17B4 #B44017 #3CB417

split-complementary

#178BB4 #B4173C #B48F17

monochromatic

#093747 #10617E #178BB4 #25B2E3 #5BC5EA

Accessibility & contrast

On white

3.90

#178BB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.39

#178BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #178BB4

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##178BB4	#FFFFFF	#000000	##000000
##178BB4	1.00	3.90	5.39	5.39
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.39	21.00	1.00	1.00
##000000	5.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7689B6

Deuteranopia (green-blind)

#627BB3

Tritanopia (blue-blind)

#009699

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #178bb4;
/* rgb */ color: rgb(23, 139, 180);
/* oklch */ color: oklch(59.6% 0.112 228.8);

Tailwind

colors: {
  custom: {
    50: '#74adca',
    500: '#178bb4',
    950: '#000000',
  },
}

SCSS

$custom: #178bb4;
$custom-light: #74adca;
$custom-dark: #000000;

JSON

{
  "hex": "#178bb4",
  "rgb": {
    "r": 23,
    "g": 139,
    "b": 180
  },
  "hsl": {
    "h": 195.669,
    "s": 77.34,
    "l": 39.804
  },
  "oklch": {
    "l": 0.59646,
    "c": 0.11208,
    "h": 228.8
  },
  "luminance": 0.21943
}

Semantic roles & 50–950 ramp

primary

#178BB4

secondary

#CE7859

accent

#6634F4

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #178BB4

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

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