#1B1C8E#1B1C8E

#1B1C8E is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.178 H 270.7°. Best body text is #FFFFFF at 13.10:1 contrast (WCAG AA passes).

Color values

HEX	#1B1C8E
RGB	rgb(27, 28, 142)
HSL	hsl(239, 68%, 33%)
HSV	hsv(239, 81%, 56%)
CMYK	cmyk(81%, 80.3%, 0%, 44.3%)
CIE-LAB	lab(20.11, 40.62, -61.61)
CIE-LCH	lch(20.11, 73.80, 303.40°)
OKLab	oklab(32.88% 0.0021 -0.1784)
OKLCH	oklch(32.88% 0.178 270.7)
XYZ	xyz(5.7481, 3.0159, 25.8651)
Luminance	0.0302 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1C8E #8E8D1B

analogous

#1B558E #1B1C8E #531B8E

triadic

#1B1C8E #8E1B1C #1C8E1B

tetradic

#1B1C8E #8E1B55 #8E8D1B #1B8E53

square

#1B1C8E #8E1B55 #8E8D1B #1B8E53

split-complementary

#1B1C8E #8E531B #558E1B

monochromatic

#070827 #11125B #1B1C8E #2526C1 #4749DC

Accessibility & contrast

On white

13.10

#1B1C8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1B1C8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1C8E

13.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1C8E	#FFFFFF	#000000	##FFFFFF
##1B1C8E	1.00	13.10	1.60	13.10
#FFFFFF	13.10	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003691

Deuteranopia (green-blind)

#002B8C

Tritanopia (blue-blind)

#003F55

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b1c8e;
/* rgb */ color: rgb(27, 28, 142);
/* oklch */ color: oklch(32.9% 0.178 270.7);

Tailwind

colors: {
  custom: {
    50: '#6e5bb0',
    500: '#1b1c8e',
    950: '#000000',
  },
}

SCSS

$custom: #1b1c8e;
$custom-light: #6e5bb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1c8e",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 142
  },
  "hsl": {
    "h": 239.478,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.32875,
    "c": 0.17841,
    "h": 270.7
  },
  "luminance": 0.03017
}

Semantic roles & 50–950 ramp

primary

#1B1C8E

secondary

#BEBD47

accent

#E93DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1C8E

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

Preview Lab → · Contrast checker → · Palette generator →