#1B1F88#1B1F88

#1B1F88 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.6% C 0.168 H 270.7°. Best body text is #FFFFFF at 13.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F88
RGB	rgb(27, 31, 136)
HSL	hsl(238, 67%, 32%)
HSV	hsv(238, 80%, 53%)
CMYK	cmyk(80.1%, 77.2%, 0%, 46.7%)
CIE-LAB	lab(20.00, 36.84, -58.03)
CIE-LCH	lch(20.00, 68.74, 302.41°)
OKLab	oklab(32.6% 0.0022 -0.168)
OKLCH	oklch(32.6% 0.168 270.7)
XYZ	xyz(5.3844, 2.9900, 23.5811)
Luminance	0.0299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F88 #88841B

analogous

#1B5688 #1B1F88 #4E1B88

triadic

#1B1F88 #881B1F #1F881B

tetradic

#1B1F88 #881B56 #88841B #1B884E

square

#1B1F88 #881B56 #88841B #1B884E

split-complementary

#1B1F88 #884E1B #56881B

monochromatic

#070822 #111355 #1B1F88 #252BBB #4449DA

Accessibility & contrast

On white

13.14

#1B1F88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1B1F88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F88

13.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F88	#FFFFFF	#000000	##FFFFFF
##1B1F88	1.00	13.14	1.60	13.14
#FFFFFF	13.14	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368B

Deuteranopia (green-blind)

#002B86

Tritanopia (blue-blind)

#003E52

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b1f88;
/* rgb */ color: rgb(27, 31, 136);
/* oklch */ color: oklch(32.6% 0.168 270.7);

Tailwind

colors: {
  custom: {
    50: '#6c5cac',
    500: '#1b1f88',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f88;
$custom-light: #6c5cac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f88",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 136
  },
  "hsl": {
    "h": 237.798,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32597,
    "c": 0.16806,
    "h": 270.7
  },
  "luminance": 0.02991
}

Semantic roles & 50–950 ramp

primary

#1B1F88

secondary

#BBB744

accent

#E33EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1F88

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

Preview Lab → · Contrast checker → · Palette generator →