#1B1F90#1B1F90

#1B1F90 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.5% C 0.178 H 270.2°. Best body text is #FFFFFF at 12.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B1F90
RGB	rgb(27, 31, 144)
HSL	hsl(238, 68%, 34%)
HSV	hsv(238, 81%, 56%)
CMYK	cmyk(81.3%, 78.5%, 0%, 43.5%)
CIE-LAB	lab(20.93, 39.63, -61.50)
CIE-LCH	lch(20.93, 73.16, 302.80°)
OKLab	oklab(33.52% 0.0007 -0.1781)
OKLCH	oklch(33.52% 0.178 270.2)
XYZ	xyz(5.9743, 3.2259, 26.6879)
Luminance	0.0323 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1F90 #908C1B

analogous

#1B5990 #1B1F90 #511B90

triadic

#1B1F90 #901B1F #1F901B

tetradic

#1B1F90 #901B59 #908C1B #1B9051

square

#1B1F90 #901B59 #908C1B #1B9051

split-complementary

#1B1F90 #90511B #59901B

monochromatic

#080929 #11145C #1B1F90 #252AC4 #494EDD

Accessibility & contrast

On white

12.76

#1B1F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1B1F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1F90

12.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1F90	#FFFFFF	#000000	##FFFFFF
##1B1F90	1.00	12.76	1.65	12.76
#FFFFFF	12.76	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003893

Deuteranopia (green-blind)

#002C8E

Tritanopia (blue-blind)

#004157

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b1f90;
/* rgb */ color: rgb(27, 31, 144);
/* oklch */ color: oklch(33.5% 0.178 270.2);

Tailwind

colors: {
  custom: {
    50: '#6f5cb2',
    500: '#1b1f90',
    950: '#000000',
  },
}

SCSS

$custom: #1b1f90;
$custom-light: #6f5cb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1f90",
  "rgb": {
    "r": 27,
    "g": 31,
    "b": 144
  },
  "hsl": {
    "h": 237.949,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.33521,
    "c": 0.17811,
    "h": 270.2
  },
  "luminance": 0.03227
}

Semantic roles & 50–950 ramp

primary

#1B1F90

secondary

#BFBB48

accent

#E53DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1F90

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

Preview Lab → · Contrast checker → · Palette generator →