#1B1F89#1B1F89

#1B1F89 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.169 H 270.7°. Best body text is #FFFFFF at 13.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F89
RGB	rgb(27, 31, 137)
HSL	hsl(238, 67%, 32%)
HSV	hsv(238, 80%, 54%)
CMYK	cmyk(80.3%, 77.4%, 0%, 46.3%)
CIE-LAB	lab(20.12, 37.20, -58.47)
CIE-LCH	lch(20.12, 69.30, 302.46°)
OKLab	oklab(32.71% 0.002 -0.1693)
OKLCH	oklch(32.71% 0.169 270.7)
XYZ	xyz(5.4558, 3.0185, 23.9572)
Luminance	0.0302 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F89 #89851B

analogous

#1B5689 #1B1F89 #4E1B89

triadic

#1B1F89 #891B1F #1F891B

tetradic

#1B1F89 #891B56 #89851B #1B894E

square

#1B1F89 #891B56 #89851B #1B894E

split-complementary

#1B1F89 #894E1B #56891B

monochromatic

#070823 #111356 #1B1F89 #252BBC #444ADA

Accessibility & contrast

On white

13.09

#1B1F89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1B1F89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F89

13.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F89	#FFFFFF	#000000	##FFFFFF
##1B1F89	1.00	13.09	1.60	13.09
#FFFFFF	13.09	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368C

Deuteranopia (green-blind)

#002B87

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b1f89;
/* rgb */ color: rgb(27, 31, 137);
/* oklch */ color: oklch(32.7% 0.169 270.7);

Tailwind

colors: {
  custom: {
    50: '#6d5cad',
    500: '#1b1f89',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f89;
$custom-light: #6d5cad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f89",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 137
  },
  "hsl": {
    "h": 237.818,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32711,
    "c": 0.16933,
    "h": 270.7
  },
  "luminance": 0.03019
}

Semantic roles & 50–950 ramp

primary

#1B1F89

secondary

#BCB744

accent

#E43EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1F89

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

Preview Lab → · Contrast checker → · Palette generator →