#1840A1#1840A1

#1840A1 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.164 H 263.7°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#1840A1
RGB	rgb(24, 64, 161)
HSL	hsl(222, 74%, 36%)
HSV	hsv(222, 85%, 63%)
CMYK	cmyk(85.1%, 60.2%, 0%, 36.9%)
CIE-LAB	lab(30.48, 24.48, -56.21)
CIE-LCH	lch(30.48, 61.31, 293.53°)
OKLab	oklab(40.96% -0.018 -0.1626)
OKLCH	oklch(40.96% 0.164 263.7)
XYZ	xyz(8.6408, 6.4331, 34.4976)
Luminance	0.0643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1840A1 #A17918

analogous

#1885A1 #1840A1 #3518A1

triadic

#1840A1 #A11840 #40A118

tetradic

#1840A1 #A11885 #A17918 #18A135

square

#1840A1 #A11885 #A17918 #18A135

split-complementary

#1840A1 #A13518 #85A118

monochromatic

#081636 #102B6C #1840A1 #2055D6 #4F7AE5

Accessibility & contrast

On white

9.18

#1840A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1840A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1840A1

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1840A1	#FFFFFF	#000000	##FFFFFF
##1840A1	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00429F

Tritanopia (blue-blind)

#00596A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1840a1;
/* rgb */ color: rgb(24, 64, 161);
/* oklch */ color: oklch(41.0% 0.164 263.7);

Tailwind

colors: {
  custom: {
    50: '#6f74be',
    500: '#1840a1',
    950: '#000000',
  },
}

SCSS

$custom: #1840a1;
$custom-light: #6f74be;
$custom-dark: #000000;

JSON

{
  "hex": "#1840a1",
  "rgb": {
    "r": 24,
    "g": 64,
    "b": 161
  },
  "hsl": {
    "h": 222.482,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40964,
    "c": 0.16359,
    "h": 263.7
  },
  "luminance": 0.06434
}

Semantic roles & 50–950 ramp

primary

#1840A1

secondary

#C7A44E

accent

#BB37F1

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1840A1

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

Preview Lab → · Contrast checker → · Palette generator →