#18637B#18637B

#18637B is a mid, moderate cyan. Relative luminance 0.105; OKLCH L 46.7% C 0.079 H 224.4°. Best body text is #FFFFFF at 6.75:1 contrast (WCAG AA passes).

Color values

HEX	#18637B
RGB	rgb(24, 99, 123)
HSL	hsl(195, 67%, 29%)
HSV	hsv(195, 80%, 48%)
CMYK	cmyk(80.5%, 19.5%, 0%, 51.8%)
CIE-LAB	lab(38.81, -13.41, -19.81)
CIE-LCH	lch(38.81, 23.93, 235.90°)
OKLab	oklab(46.69% -0.0567 -0.0555)
OKLCH	oklch(46.69% 0.079 224.4)
XYZ	xyz(8.4122, 10.5469, 20.3274)
Luminance	0.1055 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18637B #7B3018

analogous

#187B62 #18637B #18327B

triadic

#18637B #7B1863 #637B18

tetradic

#18637B #62187B #7B3018 #327B18

square

#18637B #62187B #7B3018 #327B18

split-complementary

#18637B #7B1832 #7B6218

monochromatic

#05151A #0E3A48 #18637B #228CAE #36B0D8

Accessibility & contrast

On white

6.75

#18637B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#18637B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #18637B

6.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18637B	#FFFFFF	#000000	##FFFFFF
##18637B	1.00	6.75	3.11	6.75
#FFFFFF	6.75	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#56617C

Deuteranopia (green-blind)

#48577B

Tritanopia (blue-blind)

#006A6B

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #18637b;
/* rgb */ color: rgb(24, 99, 123);
/* oklch */ color: oklch(46.7% 0.079 224.4);

Tailwind

colors: {
  custom: {
    50: '#668fa1',
    500: '#18637b',
    950: '#000000',
  },
}

SCSS

$custom: #18637b;
$custom-light: #668fa1;
$custom-dark: #000000;

JSON

{
  "hex": "#18637b",
  "rgb": {
    "r": 24,
    "g": 99,
    "b": 123
  },
  "hsl": {
    "h": 194.545,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.4669,
    "c": 0.07935,
    "h": 224.4
  },
  "luminance": 0.10548
}

Semantic roles & 50–950 ramp

primary

#18637B

secondary

#B05A3F

accent

#673EEA

background

#F6F8F9

surface

#EBF0F2

border

#C6CBCC

text

#070C0F

muted

#7A7D7E

Preview Lab

Preview with #18637B

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

Preview Lab → · Contrast checker → · Palette generator →