#1B1D8B#1B1D8B

#1B1D8B is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.174 H 270.8°. Best body text is #FFFFFF at 13.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D8B
RGB	rgb(27, 29, 139)
HSL	hsl(239, 67%, 33%)
HSV	hsv(239, 81%, 55%)
CMYK	cmyk(80.6%, 79.1%, 0%, 45.5%)
CIE-LAB	lab(19.94, 39.05, -60.01)
CIE-LCH	lch(19.94, 71.59, 303.05°)
OKLab	oklab(32.66% 0.0024 -0.1738)
OKLCH	oklch(32.66% 0.174 270.8)
XYZ	xyz(5.5500, 2.9752, 24.7029)
Luminance	0.0298 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D8B #8B891B

analogous

#1B558B #1B1D8B #511B8B

triadic

#1B1D8B #8B1B1D #1D8B1B

tetradic

#1B1D8B #8B1B55 #8B891B #1B8B51

square

#1B1D8B #8B1B55 #8B891B #1B8B51

split-complementary

#1B1D8B #8B511B #558B1B

monochromatic

#070825 #111258 #1B1D8B #2528BE #4548DB

Accessibility & contrast

On white

13.16

#1B1D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1B1D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D8B

13.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D8B	#FFFFFF	#000000	##FFFFFF
##1B1D8B	1.00	13.16	1.60	13.16
#FFFFFF	13.16	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002A89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b1d8b;
/* rgb */ color: rgb(27, 29, 139);
/* oklch */ color: oklch(32.7% 0.174 270.8);

Tailwind

colors: {
  custom: {
    50: '#6d5bae',
    500: '#1b1d8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d8b;
$custom-light: #6d5bae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d8b",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 139
  },
  "hsl": {
    "h": 238.929,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32657,
    "c": 0.17379,
    "h": 270.8
  },
  "luminance": 0.02976
}

Semantic roles & 50–950 ramp

primary

#1B1D8B

secondary

#BCBA45

accent

#E73DEA

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1D8B

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

Preview Lab → · Contrast checker → · Palette generator →