#1B1B79#1B1B79

#1B1B79 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.3% C 0.153 H 272.5°. Best body text is #FFFFFF at 14.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B1B79
RGB	rgb(27, 27, 121)
HSL	hsl(240, 64%, 29%)
HSV	hsv(240, 78%, 47%)
CMYK	cmyk(77.7%, 77.7%, 0%, 52.5%)
CIE-LAB	lab(17.45, 33.92, -52.75)
CIE-LCH	lch(17.45, 62.71, 302.74°)
OKLab	oklab(30.28% 0.0067 -0.1527)
OKLCH	oklch(30.28% 0.153 272.5)
XYZ	xyz(4.2940, 2.3969, 18.3218)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1B79 #79791B

analogous

#1B4A79 #1B1B79 #4A1B79

triadic

#1B1B79 #791B1B #1B791B

tetradic

#1B1B79 #791B4A #79791B #1B794A

square

#1B1B79 #791B4A #79791B #1B794A

split-complementary

#1B1B79 #794A1B #4A791B

monochromatic

#060619 #101047 #1B1B79 #2626AB #3B3BD3

Accessibility & contrast

On white

14.19

#1B1B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#1B1B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1B79

14.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1B79	#FFFFFF	#000000	##FFFFFF
##1B1B79	1.00	14.19	1.48	14.19
#FFFFFF	14.19	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7C

Deuteranopia (green-blind)

#002677

Tritanopia (blue-blind)

#003749

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1b1b79;
/* rgb */ color: rgb(27, 27, 121);
/* oklch */ color: oklch(30.3% 0.153 272.5);

Tailwind

colors: {
  custom: {
    50: '#6959a1',
    500: '#1b1b79',
    950: '#000000',
  },
}

SCSS

$custom: #1b1b79;
$custom-light: #6959a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1b79",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 121
  },
  "hsl": {
    "h": 240,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30278,
    "c": 0.15282,
    "h": 272.5
  },
  "luminance": 0.02397
}

Semantic roles & 50–950 ramp

primary

#1B1B79

secondary

#ADAD43

accent

#E741E7

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #1B1B79

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

Preview Lab → · Contrast checker → · Palette generator →