#1B1CB3#1B1CB3

#1B1CB3 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.4% C 0.222 H 268.6°. Best body text is #FFFFFF at 11.27:1 contrast (WCAG AA passes).

Color values

HEX	#1B1CB3
RGB	rgb(27, 28, 179)
HSL	hsl(240, 74%, 40%)
HSV	hsv(240, 85%, 70%)
CMYK	cmyk(84.9%, 84.4%, 0%, 29.8%)
CIE-LAB	lab(24.69, 52.50, -76.57)
CIE-LCH	lch(24.69, 92.84, 304.44°)
OKLab	oklab(37.38% -0.0055 -0.2217)
OKLCH	oklch(37.38% 0.222 268.6)
XYZ	xyz(9.0011, 4.3171, 42.9980)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1CB3 #B3B21B

analogous

#1B68B3 #1B1CB3 #661BB3

triadic

#1B1CB3 #B31B1C #1CB31B

tetradic

#1B1CB3 #B31B68 #B3B21B #1BB366

square

#1B1CB3 #B31B68 #B3B21B #1BB366

split-complementary

#1B1CB3 #B3661B #68B31B

monochromatic

#0B0B49 #13147E #1B1CB3 #2C2DDF #6162E7

Accessibility & contrast

On white

11.27

#1B1CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B1CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1CB3

11.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1CB3	#FFFFFF	#000000	##FFFFFF
##1B1CB3	1.00	11.27	1.86	11.27
#FFFFFF	11.27	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B7

Deuteranopia (green-blind)

#0032B1

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b1cb3;
/* rgb */ color: rgb(27, 28, 179);
/* oklch */ color: oklch(37.4% 0.222 268.6);

Tailwind

colors: {
  custom: {
    50: '#785dcb',
    500: '#1b1cb3',
    950: '#000000',
  },
}

SCSS

$custom: #1b1cb3;
$custom-light: #785dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1cb3",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 179
  },
  "hsl": {
    "h": 239.605,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.37377,
    "c": 0.22175,
    "h": 268.6
  },
  "luminance": 0.04318
}

Semantic roles & 50–950 ramp

primary

#1B1CB3

secondary

#CCCB5E

accent

#EF37F0

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #1B1CB3

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

Preview Lab → · Contrast checker → · Palette generator →