#1B5B8B#1B5B8B

#1B5B8B is a mid, moderate cyan. Relative luminance 0.096; OKLCH L 45.6% C 0.101 H 245.7°. Best body text is #FFFFFF at 7.20:1 contrast (WCAG AA passes).

Color values

HEX	#1B5B8B
RGB	rgb(27, 91, 139)
HSL	hsl(206, 67%, 33%)
HSV	hsv(206, 81%, 55%)
CMYK	cmyk(80.6%, 34.5%, 0%, 45.5%)
CIE-LAB	lab(37.07, -2.13, -32.26)
CIE-LCH	lch(37.07, 32.33, 266.22°)
OKLab	oklab(45.59% -0.0414 -0.0917)
OKLCH	oklch(45.59% 0.101 245.7)
XYZ	xyz(8.8515, 9.5782, 25.8034)
Luminance	0.0958 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5B8B #8B4B1B

analogous

#1B8B83 #1B5B8B #1B238B

triadic

#1B5B8B #8B1B5B #5B8B1B

tetradic

#1B5B8B #831B8B #8B4B1B #238B1B

square

#1B5B8B #831B8B #8B4B1B #238B1B

split-complementary

#1B5B8B #8B1B23 #8B831B

monochromatic

#071825 #113958 #1B5B8B #257DBE #459BDB

Accessibility & contrast

On white

7.20

#1B5B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.92

#1B5B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5B8B

7.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5B8B	#FFFFFF	#000000	##FFFFFF
##1B5B8B	1.00	7.20	2.92	7.20
#FFFFFF	7.20	1.00	21.00	1.00
#000000	2.92	21.00	1.00	21.00
##FFFFFF	7.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#455D8D

Deuteranopia (green-blind)

#35538A

Tritanopia (blue-blind)

#00676C

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1b5b8b;
/* rgb */ color: rgb(27, 91, 139);
/* oklch */ color: oklch(45.6% 0.101 245.7);

Tailwind

colors: {
  custom: {
    50: '#6a89ad',
    500: '#1b5b8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b5b8b;
$custom-light: #6a89ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5b8b",
  "rgb": {
    "r": 27,
    "g": 91,
    "b": 139
  },
  "hsl": {
    "h": 205.714,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.45588,
    "c": 0.10061,
    "h": 245.7
  },
  "luminance": 0.09579
}

Semantic roles & 50–950 ramp

primary

#1B5B8B

secondary

#BC7845

accent

#883DEA

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1B5B8B

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

Preview Lab → · Contrast checker → · Palette generator →