#1B1C8B#1B1C8B

#1B1C8B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.175 H 270.9°. Best body text is #FFFFFF at 13.24:1 contrast (WCAG AA passes).

Color values

HEX	#1B1C8B
RGB	rgb(27, 28, 139)
HSL	hsl(239, 67%, 33%)
HSV	hsv(239, 81%, 55%)
CMYK	cmyk(80.6%, 79.9%, 0%, 45.5%)
CIE-LAB	lab(19.75, 39.61, -60.33)
CIE-LCH	lch(19.75, 72.17, 303.28°)
OKLab	oklab(32.52% 0.0027 -0.1747)
OKLCH	oklch(32.52% 0.175 270.9)
XYZ	xyz(5.5259, 2.9270, 24.6948)
Luminance	0.0293 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1C8B #8B8A1B

analogous

#1B548B #1B1C8B #521B8B

triadic

#1B1C8B #8B1B1C #1C8B1B

tetradic

#1B1C8B #8B1B54 #8B8A1B #1B8B52

square

#1B1C8B #8B1B54 #8B8A1B #1B8B52

split-complementary

#1B1C8B #8B521B #548B1B

monochromatic

#070725 #111258 #1B1C8B #2526BE #4547DB

Accessibility & contrast

On white

13.24

#1B1C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1B1C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1C8B

13.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1C8B	#FFFFFF	#000000	##FFFFFF
##1B1C8B	1.00	13.24	1.59	13.24
#FFFFFF	13.24	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358E

Deuteranopia (green-blind)

#002A89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b1c8b;
/* rgb */ color: rgb(27, 28, 139);
/* oklch */ color: oklch(32.5% 0.175 270.9);

Tailwind

colors: {
  custom: {
    50: '#6e5aae',
    500: '#1b1c8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b1c8b;
$custom-light: #6e5aae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1c8b",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 139
  },
  "hsl": {
    "h": 239.464,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32519,
    "c": 0.17471,
    "h": 270.9
  },
  "luminance": 0.02928
}

Semantic roles & 50–950 ramp

primary

#1B1C8B

secondary

#BCBB45

accent

#E93DEA

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1C8B

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

Preview Lab → · Contrast checker → · Palette generator →