#1B1B8E#1B1B8E

#1B1B8E is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.179 H 270.8°. Best body text is #FFFFFF at 13.17:1 contrast (WCAG AA passes).

Color values

HEX	#1B1B8E
RGB	rgb(27, 27, 142)
HSL	hsl(240, 68%, 33%)
HSV	hsv(240, 81%, 56%)
CMYK	cmyk(81%, 81%, 0%, 44.3%)
CIE-LAB	lab(19.92, 41.17, -61.92)
CIE-LCH	lch(19.92, 74.36, 303.62°)
OKLab	oklab(32.74% 0.0024 -0.1793)
OKLCH	oklch(32.74% 0.179 270.8)
XYZ	xyz(5.7248, 2.9692, 25.8573)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1B8E #8E8E1B

analogous

#1B548E #1B1B8E #541B8E

triadic

#1B1B8E #8E1B1B #1B8E1B

tetradic

#1B1B8E #8E1B54 #8E8E1B #1B8E54

square

#1B1B8E #8E1B54 #8E8E1B #1B8E54

split-complementary

#1B1B8E #8E541B #548E1B

monochromatic

#070727 #11115B #1B1B8E #2525C1 #4747DC

Accessibility & contrast

On white

13.17

#1B1B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1B1B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1B8E

13.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1B8E	#FFFFFF	#000000	##FFFFFF
##1B1B8E	1.00	13.17	1.59	13.17
#FFFFFF	13.17	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003691

Deuteranopia (green-blind)

#002A8C

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b1b8e;
/* rgb */ color: rgb(27, 27, 142);
/* oklch */ color: oklch(32.7% 0.179 270.8);

Tailwind

colors: {
  custom: {
    50: '#6e5ab0',
    500: '#1b1b8e',
    950: '#000000',
  },
}

SCSS

$custom: #1b1b8e;
$custom-light: #6e5ab0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1b8e",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 142
  },
  "hsl": {
    "h": 240,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.32744,
    "c": 0.1793,
    "h": 270.8
  },
  "luminance": 0.0297
}

Semantic roles & 50–950 ramp

primary

#1B1B8E

secondary

#BEBE47

accent

#EB3DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1B8E

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

Preview Lab → · Contrast checker → · Palette generator →