#1B5981#1B5981

#1B5981 is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.5% C 0.090 H 241.7°. Best body text is #FFFFFF at 7.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B5981
RGB	rgb(27, 89, 129)
HSL	hsl(204, 65%, 31%)
HSV	hsv(204, 79%, 51%)
CMYK	cmyk(79.1%, 31%, 0%, 49.4%)
CIE-LAB	lab(35.91, -4.76, -27.99)
CIE-LCH	lch(35.91, 28.39, 260.34°)
OKLab	oklab(44.5% -0.0427 -0.0793)
OKLCH	oklch(44.5% 0.09 241.7)
XYZ	xyz(7.9853, 8.9618, 22.0736)
Luminance	0.0896 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5981 #81431B

analogous

#1B8176 #1B5981 #1B2681

triadic

#1B5981 #811B59 #59811B

tetradic

#1B5981 #761B81 #81431B #26811B

square

#1B5981 #761B81 #81431B #26811B

split-complementary

#1B5981 #811B26 #81761B

monochromatic

#06131C #10364E #1B5981 #267CB4 #3F9CD7

Accessibility & contrast

On white

7.52

#1B5981 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#1B5981 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5981

7.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5981	#FFFFFF	#000000	##FFFFFF
##1B5981	1.00	7.52	2.79	7.52
#FFFFFF	7.52	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#465A83

Deuteranopia (green-blind)

#385080

Tritanopia (blue-blind)

#006367

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1b5981;
/* rgb */ color: rgb(27, 89, 129);
/* oklch */ color: oklch(44.5% 0.090 241.7);

Tailwind

colors: {
  custom: {
    50: '#6887a6',
    500: '#1b5981',
    950: '#000000',
  },
}

SCSS

$custom: #1b5981;
$custom-light: #6887a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5981",
  "rgb": {
    "r": 27,
    "g": 89,
    "b": 129
  },
  "hsl": {
    "h": 203.529,
    "s": 65.385,
    "l": 30.588
  },
  "oklch": {
    "l": 0.44495,
    "c": 0.09003,
    "h": 241.7
  },
  "luminance": 0.08963
}

Semantic roles & 50–950 ramp

primary

#1B5981

secondary

#B57043

accent

#823FE8

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B5981

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

Preview Lab → · Contrast checker → · Palette generator →