#1B155B#1B155B

#1B155B is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.9% C 0.119 H 277.9°. Best body text is #FFFFFF at 16.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B155B
RGB	rgb(27, 21, 91)
HSL	hsl(245, 63%, 22%)
HSV	hsv(245, 77%, 36%)
CMYK	cmyk(70.3%, 76.9%, 0%, 64.3%)
CIE-LAB	lab(12.76, 26.83, -40.80)
CIE-LCH	lch(12.76, 48.83, 303.33°)
OKLab	oklab(25.95% 0.0165 -0.1178)
OKLCH	oklch(25.95% 0.119 277.9)
XYZ	xyz(2.6079, 1.5245, 10.0523)
Luminance	0.0152 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B155B #555B15

analogous

#15325B #1B155B #3E155B

triadic

#1B155B #5B1B15 #155B1B

tetradic

#1B155B #5B1532 #555B15 #155B3E

square

#1B155B #5B1532 #555B15 #155B3E

split-complementary

#1B155B #5B3E15 #325B15

monochromatic

#070619 #0C0A29 #1B155B #2A208D #392CBE

Accessibility & contrast

On white

16.09

#1B155B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.31

#1B155B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B155B

16.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B155B	#FFFFFF	#000000	##FFFFFF
##1B155B	1.00	16.09	1.31	16.09
#FFFFFF	16.09	1.00	21.00	1.00
#000000	1.31	21.00	1.00	21.00
##FFFFFF	16.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00245D

Deuteranopia (green-blind)

#001E5A

Tritanopia (blue-blind)

#002836

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #1b155b;
/* rgb */ color: rgb(27, 21, 91);
/* oklch */ color: oklch(25.9% 0.119 277.9);

Tailwind

colors: {
  custom: {
    50: '#62538a',
    500: '#1b155b',
    950: '#000000',
  },
}

SCSS

$custom: #1b155b;
$custom-light: #62538a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b155b",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 91
  },
  "hsl": {
    "h": 245.143,
    "s": 62.5,
    "l": 21.961
  },
  "oklch": {
    "l": 0.25947,
    "c": 0.11894,
    "h": 277.9
  },
  "luminance": 0.01525
}

Semantic roles & 50–950 ramp

primary

#1B155B

secondary

#8B9239

accent

#E642D8

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1B155B

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

Preview Lab → · Contrast checker → · Palette generator →