#1B156D#1B156D

#1B156D is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.0% C 0.143 H 274.9°. Best body text is #FFFFFF at 15.28:1 contrast (WCAG AA passes).

Color values

HEX	#1B156D
RGB	rgb(27, 21, 109)
HSL	hsl(244, 68%, 25%)
HSV	hsv(244, 81%, 43%)
CMYK	cmyk(75.2%, 80.7%, 0%, 57.3%)
CIE-LAB	lab(14.81, 33.24, -49.35)
CIE-LCH	lch(14.81, 59.50, 303.96°)
OKLab	oklab(28% 0.0123 -0.1427)
OKLCH	oklch(28% 0.143 274.9)
XYZ	xyz(3.4796, 1.8731, 14.6432)
Luminance	0.0187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B156D #676D15

analogous

#153B6D #1B156D #47156D

triadic

#1B156D #6D1B15 #156D1B

tetradic

#1B156D #6D153B #676D15 #156D47

square

#1B156D #6D153B #676D15 #156D47

split-complementary

#1B156D #6D4715 #3B6D15

monochromatic

#06051A #0E0B3A #1B156D #281FA0 #3429D4

Accessibility & contrast

On white

15.28

#1B156D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#1B156D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B156D

15.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B156D	#FFFFFF	#000000	##FFFFFF
##1B156D	1.00	15.28	1.37	15.28
#FFFFFF	15.28	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296F

Deuteranopia (green-blind)

#00216B

Tritanopia (blue-blind)

#002F40

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b156d;
/* rgb */ color: rgb(27, 21, 109);
/* oklch */ color: oklch(28.0% 0.143 274.9);

Tailwind

colors: {
  custom: {
    50: '#665498',
    500: '#1b156d',
    950: '#000000',
  },
}

SCSS

$custom: #1b156d;
$custom-light: #665498;
$custom-dark: #000000;

JSON

{
  "hex": "#1b156d",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 109
  },
  "hsl": {
    "h": 244.091,
    "s": 67.692,
    "l": 25.49
  },
  "oklch": {
    "l": 0.28003,
    "c": 0.14325,
    "h": 274.9
  },
  "luminance": 0.01873
}

Semantic roles & 50–950 ramp

primary

#1B156D

secondary

#9CA33A

accent

#EB3DDF

background

#F6F4F9

surface

#EBE8F2

border

#C6C4CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B156D

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

Preview Lab → · Contrast checker → · Palette generator →