#1B1DA0#1B1DA0

#1B1DA0 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 35.2% C 0.199 H 269.5°. Best body text is #FFFFFF at 12.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B1DA0
RGB	rgb(27, 29, 160)
HSL	hsl(239, 71%, 37%)
HSV	hsv(239, 83%, 63%)
CMYK	cmyk(83.1%, 81.9%, 0%, 37.3%)
CIE-LAB	lab(22.48, 46.06, -68.78)
CIE-LCH	lch(22.48, 82.78, 303.81°)
OKLab	oklab(35.16% -0.0018 -0.1992)
OKLCH	oklch(35.16% 0.199 269.5)
XYZ	xyz(7.2344, 3.6489, 33.5739)
Luminance	0.0365 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1DA0 #A09E1B

analogous

#1B60A0 #1B1DA0 #5C1BA0

triadic

#1B1DA0 #A01B1D #1DA01B

tetradic

#1B1DA0 #A01B60 #A09E1B #1BA05C

square

#1B1DA0 #A01B60 #A09E1B #1BA05C

split-complementary

#1B1DA0 #A05C1B #60A01B

monochromatic

#090A37 #12146C #1B1DA0 #2426D4 #5356E2

Accessibility & contrast

On white

12.14

#1B1DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1B1DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1DA0

12.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1DA0	#FFFFFF	#000000	##FFFFFF
##1B1DA0	1.00	12.14	1.73	12.14
#FFFFFF	12.14	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003CA4

Deuteranopia (green-blind)

#002F9E

Tritanopia (blue-blind)

#00475F

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b1da0;
/* rgb */ color: rgb(27, 29, 160);
/* oklch */ color: oklch(35.2% 0.199 269.5);

Tailwind

colors: {
  custom: {
    50: '#735cbe',
    500: '#1b1da0',
    950: '#000000',
  },
}

SCSS

$custom: #1b1da0;
$custom-light: #735cbe;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1da0",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 160
  },
  "hsl": {
    "h": 239.098,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.35162,
    "c": 0.19919,
    "h": 269.5
  },
  "luminance": 0.0365
}

Semantic roles & 50–950 ramp

primary

#1B1DA0

secondary

#C5C352

accent

#EB3AEE

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1B1DA0

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

Preview Lab → · Contrast checker → · Palette generator →