#1B728B#1B728B

#1B728B is a mid, moderate cyan. Relative luminance 0.141; OKLCH L 51.4% C 0.087 H 222.2°. Best body text is #FFFFFF at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#1B728B
RGB	rgb(27, 114, 139)
HSL	hsl(193, 67%, 33%)
HSV	hsv(193, 81%, 55%)
CMYK	cmyk(80.6%, 18%, 0%, 45.5%)
CIE-LAB	lab(44.42, -15.83, -20.80)
CIE-LCH	lch(44.42, 26.13, 232.73°)
OKLab	oklab(51.44% -0.0643 -0.0583)
OKLCH	oklch(51.44% 0.087 222.2)
XYZ	xyz(11.1276, 14.1303, 26.5620)
Luminance	0.1413 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B728B #8B341B

analogous

#1B8B6C #1B728B #1B3A8B

triadic

#1B728B #8B1B72 #728B1B

tetradic

#1B728B #6C1B8B #8B341B #3A8B1B

square

#1B728B #6C1B8B #8B341B #3A8B1B

split-complementary

#1B728B #8B1B3A #8B6C1B

monochromatic

#071E25 #114858 #1B728B #259CBE #45BADB

Accessibility & contrast

On white

5.49

#1B728B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#1B728B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1B728B

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B728B	#FFFFFF	#000000	##FFFFFF
##1B728B	1.00	5.49	3.83	5.49
#FFFFFF	5.49	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#636F8C

Deuteranopia (green-blind)

#55648B

Tritanopia (blue-blind)

#007A7A

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #1b728b;
/* rgb */ color: rgb(27, 114, 139);
/* oklch */ color: oklch(51.4% 0.087 222.2);

Tailwind

colors: {
  custom: {
    50: '#6b9aad',
    500: '#1b728b',
    950: '#000000',
  },
}

SCSS

$custom: #1b728b;
$custom-light: #6b9aad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b728b",
  "rgb": {
    "r": 27,
    "g": 114,
    "b": 139
  },
  "hsl": {
    "h": 193.393,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.51436,
    "c": 0.08678,
    "h": 222.2
  },
  "luminance": 0.14132
}

Semantic roles & 50–950 ramp

primary

#1B728B

secondary

#BC6045

accent

#643DEA

background

#F6F9FA

surface

#ECF2F4

border

#C7CCCE

text

#080E10

muted

#7A7E7F

Preview Lab

Preview with #1B728B

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

Preview Lab → · Contrast checker → · Palette generator →