#1B1CA1#1B1CA1

#1B1CA1 is a dark, highly saturated blue. Relative luminance 0.036; OKLCH L 35.2% C 0.201 H 269.5°. Best body text is #FFFFFF at 12.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B1CA1
RGB	rgb(27, 28, 161)
HSL	hsl(240, 71%, 37%)
HSV	hsv(240, 83%, 63%)
CMYK	cmyk(83.2%, 82.6%, 0%, 36.9%)
CIE-LAB	lab(22.43, 46.87, -69.47)
CIE-LCH	lch(22.43, 83.80, 304.01°)
OKLab	oklab(35.17% -0.0018 -0.2011)
OKLCH	oklch(35.17% 0.201 269.5)
XYZ	xyz(7.2981, 3.6359, 34.0285)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1CA1 #A1A01B

analogous

#1B5FA1 #1B1CA1 #5D1BA1

triadic

#1B1CA1 #A11B1C #1CA11B

tetradic

#1B1CA1 #A11B5F #A1A01B #1BA15D

square

#1B1CA1 #A11B5F #A1A01B #1BA15D

split-complementary

#1B1CA1 #A15D1B #5FA11B

monochromatic

#090A38 #12136D #1B1CA1 #2425D5 #5455E2

Accessibility & contrast

On white

12.16

#1B1CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1B1CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1CA1

12.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1CA1	#FFFFFF	#000000	##FFFFFF
##1B1CA1	1.00	12.16	1.73	12.16
#FFFFFF	12.16	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003CA5

Deuteranopia (green-blind)

#002E9F

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b1ca1;
/* rgb */ color: rgb(27, 28, 161);
/* oklch */ color: oklch(35.2% 0.201 269.5);

Tailwind

colors: {
  custom: {
    50: '#745cbe',
    500: '#1b1ca1',
    950: '#000000',
  },
}

SCSS

$custom: #1b1ca1;
$custom-light: #745cbe;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1ca1",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 161
  },
  "hsl": {
    "h": 239.552,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.35165,
    "c": 0.20116,
    "h": 269.5
  },
  "luminance": 0.03637
}

Semantic roles & 50–950 ramp

primary

#1B1CA1

secondary

#C5C452

accent

#ED3AEE

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1B1CA1

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

Preview Lab → · Contrast checker → · Palette generator →