#1B1374#1B1374

#1B1374 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.6% C 0.154 H 274.2°. Best body text is #FFFFFF at 15.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B1374
RGB	rgb(27, 19, 116)
HSL	hsl(245, 72%, 26%)
HSV	hsv(245, 84%, 45%)
CMYK	cmyk(76.7%, 83.6%, 0%, 54.5%)
CIE-LAB	lab(15.27, 36.72, -53.13)
CIE-LCH	lch(15.27, 64.58, 304.65°)
OKLab	oklab(28.58% 0.0114 -0.1537)
OKLCH	oklch(28.58% 0.154 274.2)
XYZ	xyz(3.8362, 1.9593, 16.6956)
Luminance	0.0196 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1374 #6C7413

analogous

#133C74 #1B1374 #4C1374

triadic

#1B1374 #741B13 #13741B

tetradic

#1B1374 #74133C #6C7413 #13744C

square

#1B1374 #74133C #6C7413 #13744C

split-complementary

#1B1374 #744C13 #3C7413

monochromatic

#06041A #0F0A3F #1B1374 #271CA9 #3526DB

Accessibility & contrast

On white

15.09

#1B1374 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#1B1374 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1374

15.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1374	#FFFFFF	#000000	##FFFFFF
##1B1374	1.00	15.09	1.39	15.09
#FFFFFF	15.09	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B77

Deuteranopia (green-blind)

#002272

Tritanopia (blue-blind)

#003144

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1b1374;
/* rgb */ color: rgb(27, 19, 116);
/* oklch */ color: oklch(28.6% 0.154 274.2);

Tailwind

colors: {
  custom: {
    50: '#68549d',
    500: '#1b1374',
    950: '#000000',
  },
}

SCSS

$custom: #1b1374;
$custom-light: #68549d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1374",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 116
  },
  "hsl": {
    "h": 244.948,
    "s": 71.852,
    "l": 26.471
  },
  "oklch": {
    "l": 0.28577,
    "c": 0.15409,
    "h": 274.2
  },
  "luminance": 0.0196
}

Semantic roles & 50–950 ramp

primary

#1B1374

secondary

#A1AA38

accent

#EF39E0

background

#F6F4F9

surface

#ECE7F2

border

#C7C3CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1374

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

Preview Lab → · Contrast checker → · Palette generator →