#1B1D84#1B1D84

#1B1D84 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.8% C 0.165 H 271.3°. Best body text is #FFFFFF at 13.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D84
RGB	rgb(27, 29, 132)
HSL	hsl(239, 66%, 31%)
HSV	hsv(239, 80%, 52%)
CMYK	cmyk(79.5%, 78%, 0%, 48.2%)
CIE-LAB	lab(19.13, 36.61, -56.96)
CIE-LCH	lch(19.13, 67.72, 302.73°)
OKLab	oklab(31.84% 0.0037 -0.1649)
OKLCH	oklch(31.84% 0.165 271.3)
XYZ	xyz(5.0548, 2.7771, 22.0950)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D84 #84821B

analogous

#1B5184 #1B1D84 #4D1B84

triadic

#1B1D84 #841B1D #1D841B

tetradic

#1B1D84 #841B51 #84821B #1B844D

square

#1B1D84 #841B51 #84821B #1B844D

split-complementary

#1B1D84 #844D1B #51841B

monochromatic

#06071E #111251 #1B1D84 #2528B7 #4144D8

Accessibility & contrast

On white

13.50

#1B1D84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B1D84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D84

13.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D84	#FFFFFF	#000000	##FFFFFF
##1B1D84	1.00	13.50	1.56	13.50
#FFFFFF	13.50	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003487

Deuteranopia (green-blind)

#002982

Tritanopia (blue-blind)

#003C4F

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b1d84;
/* rgb */ color: rgb(27, 29, 132);
/* oklch */ color: oklch(31.8% 0.165 271.3);

Tailwind

colors: {
  custom: {
    50: '#6c5ba9',
    500: '#1b1d84',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d84;
$custom-light: #6c5ba9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d84",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 132
  },
  "hsl": {
    "h": 238.857,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31842,
    "c": 0.16497,
    "h": 271.3
  },
  "luminance": 0.02778
}

Semantic roles & 50–950 ramp

primary

#1B1D84

secondary

#B7B543

accent

#E63FE9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1D84

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

Preview Lab → · Contrast checker → · Palette generator →