#1B156C#1B156C

#1B156C is a dark, vivid blue. Relative luminance 0.019; OKLCH L 27.9% C 0.142 H 275.1°. Best body text is #FFFFFF at 15.32:1 contrast (WCAG AA passes).

Color values

HEX	#1B156C
RGB	rgb(27, 21, 108)
HSL	hsl(244, 67%, 25%)
HSV	hsv(244, 81%, 42%)
CMYK	cmyk(75%, 80.6%, 0%, 57.6%)
CIE-LAB	lab(14.69, 32.89, -48.89)
CIE-LCH	lch(14.69, 58.92, 303.92°)
OKLab	oklab(27.89% 0.0125 -0.1414)
OKLCH	oklch(27.89% 0.142 275.1)
XYZ	xyz(3.4260, 1.8517, 14.3613)
Luminance	0.0185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B156C #666C15

analogous

#153A6C #1B156C #46156C

triadic

#1B156C #6C1B15 #156C1B

tetradic

#1B156C #6C153A #666C15 #156C46

square

#1B156C #6C153A #666C15 #156C46

split-complementary

#1B156C #6C4615 #3A6C15

monochromatic

#06051A #0E0B39 #1B156C #281F9F #3529D2

Accessibility & contrast

On white

15.32

#1B156C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#1B156C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B156C

15.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B156C	#FFFFFF	#000000	##FFFFFF
##1B156C	1.00	15.32	1.37	15.32
#FFFFFF	15.32	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296E

Deuteranopia (green-blind)

#00216A

Tritanopia (blue-blind)

#002F40

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b156c;
/* rgb */ color: rgb(27, 21, 108);
/* oklch */ color: oklch(27.9% 0.142 275.1);

Tailwind

colors: {
  custom: {
    50: '#665497',
    500: '#1b156c',
    950: '#000000',
  },
}

SCSS

$custom: #1b156c;
$custom-light: #665497;
$custom-dark: #000000;

JSON

{
  "hex": "#1b156c",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 108
  },
  "hsl": {
    "h": 244.138,
    "s": 67.442,
    "l": 25.294
  },
  "oklch": {
    "l": 0.27886,
    "c": 0.14195,
    "h": 275.1
  },
  "luminance": 0.01852
}

Semantic roles & 50–950 ramp

primary

#1B156C

secondary

#9BA33A

accent

#EA3DDE

background

#F6F4F9

surface

#EBE8F2

border

#C6C4CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B156C

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

Preview Lab → · Contrast checker → · Palette generator →