#1B597B#1B597B

#1B597B is a dark, moderate cyan. Relative luminance 0.088; OKLCH L 44.2% C 0.083 H 237.4°. Best body text is #FFFFFF at 7.60:1 contrast (WCAG AA passes).

Color values

HEX	#1B597B
RGB	rgb(27, 89, 123)
HSL	hsl(201, 64%, 29%)
HSV	hsv(201, 78%, 48%)
CMYK	cmyk(78%, 27.6%, 0%, 51.8%)
CIE-LAB	lab(35.61, -7.07, -24.77)
CIE-LCH	lch(35.61, 25.76, 254.08°)
OKLab	oklab(44.16% -0.0448 -0.0699)
OKLCH	oklch(44.16% 0.083 237.4)
XYZ	xyz(7.5981, 8.8069, 20.0345)
Luminance	0.0881 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B597B #7B3D1B

analogous

#1B7B6D #1B597B #1B297B

triadic

#1B597B #7B1B59 #597B1B

tetradic

#1B597B #6D1B7B #7B3D1B #297B1B

square

#1B597B #6D1B7B #7B3D1B #297B1B

split-complementary

#1B597B #7B1B29 #7B6D1B

monochromatic

#061219 #103549 #1B597B #267DAD #3C9ED4

Accessibility & contrast

On white

7.60

#1B597B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#1B597B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B597B

7.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B597B	#FFFFFF	#000000	##FFFFFF
##1B597B	1.00	7.60	2.76	7.60
#FFFFFF	7.60	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#49597D

Deuteranopia (green-blind)

#3C507A

Tritanopia (blue-blind)

#006265

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1b597b;
/* rgb */ color: rgb(27, 89, 123);
/* oklch */ color: oklch(44.2% 0.083 237.4);

Tailwind

colors: {
  custom: {
    50: '#6787a1',
    500: '#1b597b',
    950: '#000000',
  },
}

SCSS

$custom: #1b597b;
$custom-light: #6787a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b597b",
  "rgb": {
    "r": 27,
    "g": 89,
    "b": 123
  },
  "hsl": {
    "h": 201.25,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.44158,
    "c": 0.08304,
    "h": 237.4
  },
  "luminance": 0.08808
}

Semantic roles & 50–950 ramp

primary

#1B597B

secondary

#AF6943

accent

#7C41E7

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #1B597B

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

Preview Lab → · Contrast checker → · Palette generator →