#187B9F#187B9F

#187B9F is a mid, moderate cyan. Relative luminance 0.169; OKLCH L 54.6% C 0.101 H 228.8°. Best body text is #FFFFFF at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#187B9F
RGB	rgb(24, 123, 159)
HSL	hsl(196, 74%, 36%)
HSV	hsv(196, 85%, 62%)
CMYK	cmyk(84.9%, 22.6%, 0%, 37.6%)
CIE-LAB	lab(48.09, -13.97, -26.94)
CIE-LCH	lch(48.09, 30.35, 242.58°)
OKLab	oklab(54.64% -0.0664 -0.0758)
OKLCH	oklch(54.64% 0.101 228.8)
XYZ	xyz(13.7151, 16.8616, 35.3259)
Luminance	0.1686 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#187B9F #9F3C18

analogous

#189F7F #187B9F #18379F

triadic

#187B9F #9F187B #7B9F18

tetradic

#187B9F #7F189F #9F3C18 #379F18

square

#187B9F #7F189F #9F3C18 #379F18

split-complementary

#187B9F #9F1837 #9F7F18

monochromatic

#082935 #10526A #187B9F #20A4D4 #4DBCE4

Accessibility & contrast

On white

4.80

#187B9F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#187B9F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #187B9F

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##187B9F	#FFFFFF	#000000	##FFFFFF
##187B9F	1.00	4.80	4.37	4.80
#FFFFFF	4.80	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6879A1

Deuteranopia (green-blind)

#576D9F

Tritanopia (blue-blind)

#008587

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #187b9f;
/* rgb */ color: rgb(24, 123, 159);
/* oklch */ color: oklch(54.6% 0.101 228.8);

Tailwind

colors: {
  custom: {
    50: '#6fa1bb',
    500: '#187b9f',
    950: '#000000',
  },
}

SCSS

$custom: #187b9f;
$custom-light: #6fa1bb;
$custom-dark: #000000;

JSON

{
  "hex": "#187b9f",
  "rgb": {
    "r": 24,
    "g": 123,
    "b": 159
  },
  "hsl": {
    "h": 196,
    "s": 73.77,
    "l": 35.882
  },
  "oklch": {
    "l": 0.54642,
    "c": 0.10079,
    "h": 228.8
  },
  "luminance": 0.16863
}

Semantic roles & 50–950 ramp

primary

#187B9F

secondary

#C66D4D

accent

#6937F0

background

#F7F9FB

surface

#EDF2F6

border

#C8CCD0

text

#090F12

muted

#7B7E81

Preview Lab

Preview with #187B9F

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

Preview Lab → · Contrast checker → · Palette generator →