#1B5873#1B5873

#1B5873 is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 43.5% C 0.075 H 231.5°. Best body text is #FFFFFF at 7.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B5873
RGB	rgb(27, 88, 115)
HSL	hsl(198, 62%, 28%)
HSV	hsv(198, 77%, 45%)
CMYK	cmyk(76.5%, 23.5%, 0%, 54.9%)
CIE-LAB	lab(34.90, -9.47, -20.93)
CIE-LCH	lch(34.90, 22.97, 245.65°)
OKLab	oklab(43.47% -0.0467 -0.0588)
OKLCH	oklch(43.47% 0.075 231.5)
XYZ	xyz(7.0350, 8.4494, 17.4765)
Luminance	0.0845 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5873 #73361B

analogous

#1B7362 #1B5873 #1B2C73

triadic

#1B5873 #731B58 #58731B

tetradic

#1B5873 #621B73 #73361B #2C731B

square

#1B5873 #621B73 #73361B #2C731B

split-complementary

#1B5873 #731B2C #73621B

monochromatic

#061319 #0F3241 #1B5873 #277EA5 #38A2D0

Accessibility & contrast

On white

7.81

#1B5873 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.69

#1B5873 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5873

7.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5873	#FFFFFF	#000000	##FFFFFF
##1B5873	1.00	7.81	2.69	7.81
#FFFFFF	7.81	1.00	21.00	1.00
#000000	2.69	21.00	1.00	21.00
##FFFFFF	7.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A5774

Deuteranopia (green-blind)

#3E4E73

Tritanopia (blue-blind)

#005F61

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b5873;
/* rgb */ color: rgb(27, 88, 115);
/* oklch */ color: oklch(43.5% 0.075 231.5);

Tailwind

colors: {
  custom: {
    50: '#65879b',
    500: '#1b5873',
    950: '#000000',
  },
}

SCSS

$custom: #1b5873;
$custom-light: #65879b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5873",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 115
  },
  "hsl": {
    "h": 198.409,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.43469,
    "c": 0.07514,
    "h": 231.5
  },
  "luminance": 0.0845
}

Semantic roles & 50–950 ramp

primary

#1B5873

secondary

#A86142

accent

#7543E5

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#060B0E

muted

#7A7C7E

Preview Lab

Preview with #1B5873

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

Preview Lab → · Contrast checker → · Palette generator →