#187D9F#187D9F

#187D9F is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.1% C 0.100 H 226.9°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#187D9F
RGB	rgb(24, 125, 159)
HSL	hsl(195, 74%, 36%)
HSV	hsv(195, 85%, 62%)
CMYK	cmyk(84.9%, 21.4%, 0%, 37.6%)
CIE-LAB	lab(48.71, -15.10, -25.96)
CIE-LCH	lch(48.71, 30.03, 239.82°)
OKLab	oklab(55.15% -0.0683 -0.073)
OKLCH	oklch(55.15% 0.1 226.9)
XYZ	xyz(13.9657, 17.3628, 35.4095)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#187D9F #9F3A18

analogous

#189F7D #187D9F #18399F

triadic

#187D9F #9F187D #7D9F18

tetradic

#187D9F #7D189F #9F3A18 #399F18

square

#187D9F #7D189F #9F3A18 #399F18

split-complementary

#187D9F #9F1839 #9F7D18

monochromatic

#082935 #10536A #187D9F #20A7D4 #4DBEE4

Accessibility & contrast

On white

4.69

#187D9F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#187D9F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #187D9F

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##187D9F	#FFFFFF	#000000	##FFFFFF
##187D9F	1.00	4.69	4.47	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B7BA1

Deuteranopia (green-blind)

#596E9F

Tritanopia (blue-blind)

#008788

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #187d9f;
/* rgb */ color: rgb(24, 125, 159);
/* oklch */ color: oklch(55.1% 0.100 226.9);

Tailwind

colors: {
  custom: {
    50: '#6fa2bb',
    500: '#187d9f',
    950: '#000000',
  },
}

SCSS

$custom: #187d9f;
$custom-light: #6fa2bb;
$custom-dark: #000000;

JSON

{
  "hex": "#187d9f",
  "rgb": {
    "r": 24,
    "g": 125,
    "b": 159
  },
  "hsl": {
    "h": 195.111,
    "s": 73.77,
    "l": 35.882
  },
  "oklch": {
    "l": 0.55146,
    "c": 0.09996,
    "h": 226.9
  },
  "luminance": 0.17365
}

Semantic roles & 50–950 ramp

primary

#187D9F

secondary

#C66B4D

accent

#6637F0

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F12

muted

#7B7F81

Preview Lab

Preview with #187D9F

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

Preview Lab → · Contrast checker → · Palette generator →