#1B156B#1B156B

#1B156B is a dark, vivid blue. Relative luminance 0.018; OKLCH L 27.8% C 0.141 H 275.2°. Best body text is #FFFFFF at 15.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B156B
RGB	rgb(27, 21, 107)
HSL	hsl(244, 67%, 25%)
HSV	hsv(244, 80%, 42%)
CMYK	cmyk(74.8%, 80.4%, 0%, 58%)
CIE-LAB	lab(14.57, 32.54, -48.43)
CIE-LCH	lch(14.57, 58.35, 303.89°)
OKLab	oklab(27.77% 0.0128 -0.14)
OKLCH	oklch(27.77% 0.141 275.2)
XYZ	xyz(3.3731, 1.8306, 14.0826)
Luminance	0.0183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B156B #656B15

analogous

#153A6B #1B156B #46156B

triadic

#1B156B #6B1B15 #156B1B

tetradic

#1B156B #6B153A #656B15 #156B46

square

#1B156B #6B153A #656B15 #156B46

split-complementary

#1B156B #6B4615 #3A6B15

monochromatic

#06051A #0E0B38 #1B156B #281F9E #3529D1

Accessibility & contrast

On white

15.37

#1B156B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#1B156B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B156B

15.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B156B	#FFFFFF	#000000	##FFFFFF
##1B156B	1.00	15.37	1.37	15.37
#FFFFFF	15.37	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296D

Deuteranopia (green-blind)

#002169

Tritanopia (blue-blind)

#002E3F

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b156b;
/* rgb */ color: rgb(27, 21, 107);
/* oklch */ color: oklch(27.8% 0.141 275.2);

Tailwind

colors: {
  custom: {
    50: '#665496',
    500: '#1b156b',
    950: '#000000',
  },
}

SCSS

$custom: #1b156b;
$custom-light: #665496;
$custom-dark: #000000;

JSON

{
  "hex": "#1b156b",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 107
  },
  "hsl": {
    "h": 244.186,
    "s": 67.188,
    "l": 25.098
  },
  "oklch": {
    "l": 0.27769,
    "c": 0.14063,
    "h": 275.2
  },
  "luminance": 0.01831
}

Semantic roles & 50–950 ramp

primary

#1B156B

secondary

#9AA23A

accent

#EA3EDE

background

#F6F4F9

surface

#EBE8F2

border

#C6C4CC

text

#07030D

muted

#7A787E

Preview Lab

Preview with #1B156B

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

Preview Lab → · Contrast checker → · Palette generator →