#1B1C8F#1B1C8F

#1B1C8F is a dark, vivid blue. Relative luminance 0.030; OKLCH L 33.0% C 0.180 H 270.6°. Best body text is #FFFFFF at 13.05:1 contrast (WCAG AA passes).

Color values

HEX	#1B1C8F
RGB	rgb(27, 28, 143)
HSL	hsl(239, 68%, 33%)
HSV	hsv(239, 81%, 56%)
CMYK	cmyk(81.1%, 80.4%, 0%, 43.9%)
CIE-LAB	lab(20.23, 40.96, -62.03)
CIE-LCH	lch(20.23, 74.34, 303.44°)
OKLab	oklab(32.99% 0.0019 -0.1796)
OKLCH	oklch(32.99% 0.18 270.6)
XYZ	xyz(5.8235, 3.0460, 26.2623)
Luminance	0.0305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1C8F #8F8E1B

analogous

#1B568F #1B1C8F #541B8F

triadic

#1B1C8F #8F1B1C #1C8F1B

tetradic

#1B1C8F #8F1B56 #8F8E1B #1B8F54

square

#1B1C8F #8F1B56 #8F8E1B #1B8F54

split-complementary

#1B1C8F #8F541B #568F1B

monochromatic

#080828 #11125C #1B1C8F #2526C2 #4849DC

Accessibility & contrast

On white

13.05

#1B1C8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B1C8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1C8F

13.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1C8F	#FFFFFF	#000000	##FFFFFF
##1B1C8F	1.00	13.05	1.61	13.05
#FFFFFF	13.05	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003792

Deuteranopia (green-blind)

#002B8D

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b1c8f;
/* rgb */ color: rgb(27, 28, 143);
/* oklch */ color: oklch(33.0% 0.180 270.6);

Tailwind

colors: {
  custom: {
    50: '#6f5bb1',
    500: '#1b1c8f',
    950: '#000000',
  },
}

SCSS

$custom: #1b1c8f;
$custom-light: #6f5bb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1c8f",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 143
  },
  "hsl": {
    "h": 239.483,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.32994,
    "c": 0.17964,
    "h": 270.6
  },
  "luminance": 0.03047
}

Semantic roles & 50–950 ramp

primary

#1B1C8F

secondary

#BEBD48

accent

#EA3DEB

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1B1C8F

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

Preview Lab → · Contrast checker → · Palette generator →