#1B2DA1#1B2DA1

#1B2DA1 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.6% C 0.185 H 267.9°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#1B2DA1
RGB	rgb(27, 45, 161)
HSL	hsl(232, 71%, 37%)
HSV	hsv(232, 83%, 63%)
CMYK	cmyk(83.2%, 72%, 0%, 36.9%)
CIE-LAB	lab(25.81, 37.27, -63.87)
CIE-LCH	lch(25.81, 73.95, 300.26°)
OKLab	oklab(37.56% -0.0067 -0.1851)
OKLCH	oklch(37.56% 0.185 267.9)
XYZ	xyz(7.8212, 4.6821, 34.2028)
Luminance	0.0468 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2DA1 #A18F1B

analogous

#1B70A1 #1B2DA1 #4C1BA1

triadic

#1B2DA1 #A11B2D #2DA11B

tetradic

#1B2DA1 #A11B70 #A18F1B #1BA14C

square

#1B2DA1 #A11B70 #A18F1B #1BA14C

split-complementary

#1B2DA1 #A14C1B #70A11B

monochromatic

#091038 #121E6D #1B2DA1 #243CD5 #5467E2

Accessibility & contrast

On white

10.84

#1B2DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1B2DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2DA1

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2DA1	#FFFFFF	#000000	##FFFFFF
##1B2DA1	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A4

Deuteranopia (green-blind)

#00379F

Tritanopia (blue-blind)

#004E64

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b2da1;
/* rgb */ color: rgb(27, 45, 161);
/* oklch */ color: oklch(37.6% 0.185 267.9);

Tailwind

colors: {
  custom: {
    50: '#7266be',
    500: '#1b2da1',
    950: '#000000',
  },
}

SCSS

$custom: #1b2da1;
$custom-light: #7266be;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2da1",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 161
  },
  "hsl": {
    "h": 231.94,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.37559,
    "c": 0.18522,
    "h": 267.9
  },
  "luminance": 0.04683
}

Semantic roles & 50–950 ramp

primary

#1B2DA1

secondary

#C5B652

accent

#D63AEE

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B2DA1

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

Preview Lab → · Contrast checker → · Palette generator →