#1B5383#1B5383

#1B5383 is a dark, moderate cyan. Relative luminance 0.081; OKLCH L 43.1% C 0.098 H 248.4°. Best body text is #FFFFFF at 8.04:1 contrast (WCAG AA passes).

Color values

HEX	#1B5383
RGB	rgb(27, 83, 131)
HSL	hsl(208, 66%, 31%)
HSV	hsv(208, 79%, 51%)
CMYK	cmyk(79.4%, 36.6%, 0%, 48.6%)
CIE-LAB	lab(34.10, -0.17, -32.07)
CIE-LCH	lch(34.10, 32.07, 269.70°)
OKLab	oklab(43.1% -0.0361 -0.0913)
OKLCH	oklch(43.1% 0.098 248.4)
XYZ	xyz(7.6404, 8.0573, 22.6209)
Luminance	0.0806 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5383 #834B1B

analogous

#1B837F #1B5383 #1B1F83

triadic

#1B5383 #831B53 #53831B

tetradic

#1B5383 #7F1B83 #834B1B #1F831B

square

#1B5383 #7F1B83 #834B1B #1F831B

split-complementary

#1B5383 #831B1F #837F1B

monochromatic

#06131E #113350 #1B5383 #2573B6 #4192D8

Accessibility & contrast

On white

8.04

#1B5383 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#1B5383 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5383

8.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5383	#FFFFFF	#000000	##FFFFFF
##1B5383	1.00	8.04	2.61	8.04
#FFFFFF	8.04	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D5585

Deuteranopia (green-blind)

#2D4C82

Tritanopia (blue-blind)

#005E65

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b5383;
/* rgb */ color: rgb(27, 83, 131);
/* oklch */ color: oklch(43.1% 0.098 248.4);

Tailwind

colors: {
  custom: {
    50: '#6883a7',
    500: '#1b5383',
    950: '#000000',
  },
}

SCSS

$custom: #1b5383;
$custom-light: #6883a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5383",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 131
  },
  "hsl": {
    "h": 207.692,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.43104,
    "c": 0.09814,
    "h": 248.4
  },
  "luminance": 0.08058
}

Semantic roles & 50–950 ramp

primary

#1B5383

secondary

#B67843

accent

#8D3FE9

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B5383

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

Preview Lab → · Contrast checker → · Palette generator →