#1B1C4E#1B1C4E

#1B1C4E is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.0% C 0.090 H 277.2°. Best body text is #FFFFFF at 15.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B1C4E
RGB	rgb(27, 28, 78)
HSL	hsl(239, 49%, 21%)
HSV	hsv(239, 65%, 31%)
CMYK	cmyk(65.4%, 64.1%, 0%, 69.4%)
CIE-LAB	lab(13.31, 17.05, -31.08)
CIE-LCH	lch(13.31, 35.45, 298.75°)
OKLab	oklab(25.95% 0.0113 -0.0893)
OKLCH	oklch(25.95% 0.09 277.2)
XYZ	xyz(2.2420, 1.6134, 7.3995)
Luminance	0.0161 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1C4E #4E4D1B

analogous

#1B354E #1B1C4E #331B4E

triadic

#1B1C4E #4E1B1C #1C4E1B

tetradic

#1B1C4E #4E1B35 #4E4D1B #1B4E33

square

#1B1C4E #4E1B35 #4E4D1B #1B4E33

split-complementary

#1B1C4E #4E331B #354E1B

monochromatic

#080817 #0B0C21 #1B1C4E #2B2C7B #3A3DA9

Accessibility & contrast

On white

15.88

#1B1C4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#1B1C4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1C4E

15.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1C4E	#FFFFFF	#000000	##FFFFFF
##1B1C4E	1.00	15.88	1.32	15.88
#FFFFFF	15.88	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002450

Deuteranopia (green-blind)

#00204D

Tritanopia (blue-blind)

#002831

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #1b1c4e;
/* rgb */ color: rgb(27, 28, 78);
/* oklch */ color: oklch(26.0% 0.090 277.2);

Tailwind

colors: {
  custom: {
    50: '#5e5880',
    500: '#1b1c4e',
    950: '#000000',
  },
}

SCSS

$custom: #1b1c4e;
$custom-light: #5e5880;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1c4e",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 78
  },
  "hsl": {
    "h": 238.824,
    "s": 48.571,
    "l": 20.588
  },
  "oklch": {
    "l": 0.25954,
    "c": 0.08998,
    "h": 277.2
  },
  "luminance": 0.01614
}

Semantic roles & 50–950 ramp

primary

#1B1C4E

secondary

#848341

accent

#D550D8

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#05030A

muted

#79787C

Preview Lab

Preview with #1B1C4E

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

Preview Lab → · Contrast checker → · Palette generator →