#1B1CA0#1B1CA0

#1B1CA0 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 35.0% C 0.200 H 269.5°. Best body text is #FFFFFF at 12.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B1CA0
RGB	rgb(27, 28, 160)
HSL	hsl(240, 71%, 37%)
HSV	hsv(240, 83%, 63%)
CMYK	cmyk(83.1%, 82.5%, 0%, 37.3%)
CIE-LAB	lab(22.30, 46.55, -69.06)
CIE-LCH	lch(22.30, 83.29, 303.98°)
OKLab	oklab(35.04% -0.0016 -0.2)
OKLCH	oklch(35.04% 0.2 269.5)
XYZ	xyz(7.2102, 3.6007, 33.5659)
Luminance	0.0360 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1CA0 #A09F1B

analogous

#1B5FA0 #1B1CA0 #5D1BA0

triadic

#1B1CA0 #A01B1C #1CA01B

tetradic

#1B1CA0 #A01B5F #A09F1B #1BA05D

square

#1B1CA0 #A01B5F #A09F1B #1BA05D

split-complementary

#1B1CA0 #A05D1B #5FA01B

monochromatic

#090A37 #12136C #1B1CA0 #2425D4 #5354E2

Accessibility & contrast

On white

12.21

#1B1CA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B1CA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1CA0

12.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1CA0	#FFFFFF	#000000	##FFFFFF
##1B1CA0	1.00	12.21	1.72	12.21
#FFFFFF	12.21	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003CA4

Deuteranopia (green-blind)

#002E9E

Tritanopia (blue-blind)

#00465F

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b1ca0;
/* rgb */ color: rgb(27, 28, 160);
/* oklch */ color: oklch(35.0% 0.200 269.5);

Tailwind

colors: {
  custom: {
    50: '#735cbe',
    500: '#1b1ca0',
    950: '#000000',
  },
}

SCSS

$custom: #1b1ca0;
$custom-light: #735cbe;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1ca0",
  "rgb": {
    "r": 27,
    "g": 28,
    "b": 160
  },
  "hsl": {
    "h": 239.549,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.35043,
    "c": 0.19999,
    "h": 269.5
  },
  "luminance": 0.03602
}

Semantic roles & 50–950 ramp

primary

#1B1CA0

secondary

#C5C452

accent

#ED3AEE

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1B1CA0

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

Preview Lab → · Contrast checker → · Palette generator →