#1B1D8D#1B1D8D

#1B1D8D is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.176 H 270.6°. Best body text is #FFFFFF at 13.07:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D8D
RGB	rgb(27, 29, 141)
HSL	hsl(239, 68%, 33%)
HSV	hsv(239, 81%, 55%)
CMYK	cmyk(80.9%, 79.4%, 0%, 44.7%)
CIE-LAB	lab(20.18, 39.73, -60.87)
CIE-LCH	lch(20.18, 72.69, 303.14°)
OKLab	oklab(32.89% 0.002 -0.1763)
OKLCH	oklch(32.89% 0.176 270.6)
XYZ	xyz(5.6974, 3.0342, 25.4795)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D8D #8D8B1B

analogous

#1B568D #1B1D8D #521B8D

triadic

#1B1D8D #8D1B1D #1D8D1B

tetradic

#1B1D8D #8D1B56 #8D8B1B #1B8D52

square

#1B1D8D #8D1B56 #8D8B1B #1B8D52

split-complementary

#1B1D8D #8D521B #568D1B

monochromatic

#070826 #11125A #1B1D8D #2528C0 #4749DC

Accessibility & contrast

On white

13.07

#1B1D8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B1D8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D8D

13.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D8D	#FFFFFF	#000000	##FFFFFF
##1B1D8D	1.00	13.07	1.61	13.07
#FFFFFF	13.07	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003690

Deuteranopia (green-blind)

#002B8B

Tritanopia (blue-blind)

#003F54

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b1d8d;
/* rgb */ color: rgb(27, 29, 141);
/* oklch */ color: oklch(32.9% 0.176 270.6);

Tailwind

colors: {
  custom: {
    50: '#6e5bb0',
    500: '#1b1d8d',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d8d;
$custom-light: #6e5bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d8d",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 141
  },
  "hsl": {
    "h": 238.947,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.32892,
    "c": 0.17627,
    "h": 270.6
  },
  "luminance": 0.03035
}

Semantic roles & 50–950 ramp

primary

#1B1D8D

secondary

#BDBB46

accent

#E83DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1D8D

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

Preview Lab → · Contrast checker → · Palette generator →