#1B5B79#1B5B79

#1B5B79 is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.6% C 0.080 H 233.3°. Best body text is #FFFFFF at 7.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B5B79
RGB	rgb(27, 91, 121)
HSL	hsl(199, 64%, 29%)
HSV	hsv(199, 78%, 47%)
CMYK	cmyk(77.7%, 24.8%, 0%, 52.5%)
CIE-LAB	lab(36.17, -9.04, -22.67)
CIE-LCH	lch(36.17, 24.41, 248.26°)
OKLab	oklab(44.57% -0.0476 -0.0638)
OKLCH	oklch(44.57% 0.08 233.3)
XYZ	xyz(7.6429, 9.0948, 19.4381)
Luminance	0.0910 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5B79 #79391B

analogous

#1B7968 #1B5B79 #1B2C79

triadic

#1B5B79 #791B5B #5B791B

tetradic

#1B5B79 #681B79 #79391B #2C791B

square

#1B5B79 #681B79 #79391B #2C791B

split-complementary

#1B5B79 #791B2C #79681B

monochromatic

#061319 #103547 #1B5B79 #2681AB #3BA3D3

Accessibility & contrast

On white

7.45

#1B5B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#1B5B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5B79

7.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5B79	#FFFFFF	#000000	##FFFFFF
##1B5B79	1.00	7.45	2.82	7.45
#FFFFFF	7.45	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C5A7A

Deuteranopia (green-blind)

#3F5179

Tritanopia (blue-blind)

#006365

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1b5b79;
/* rgb */ color: rgb(27, 91, 121);
/* oklch */ color: oklch(44.6% 0.080 233.3);

Tailwind

colors: {
  custom: {
    50: '#6689a0',
    500: '#1b5b79',
    950: '#000000',
  },
}

SCSS

$custom: #1b5b79;
$custom-light: #6689a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5b79",
  "rgb": {
    "r": 27,
    "g": 91,
    "b": 121
  },
  "hsl": {
    "h": 199.149,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.44569,
    "c": 0.07964,
    "h": 233.3
  },
  "luminance": 0.09096
}

Semantic roles & 50–950 ramp

primary

#1B5B79

secondary

#AD6543

accent

#7641E7

background

#F6F8F9

surface

#EBF0F2

border

#C6CBCC

text

#070B0E

muted

#7A7C7E

Preview Lab

Preview with #1B5B79

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

Preview Lab → · Contrast checker → · Palette generator →