#1840A5#1840A5

#1840A5 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.3% C 0.169 H 263.9°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#1840A5
RGB	rgb(24, 64, 165)
HSL	hsl(223, 75%, 37%)
HSV	hsv(223, 85%, 65%)
CMYK	cmyk(85.5%, 61.2%, 0%, 35.3%)
CIE-LAB	lab(30.82, 26.07, -58.06)
CIE-LCH	lch(30.82, 63.64, 294.18°)
OKLab	oklab(41.33% -0.0179 -0.168)
OKLCH	oklch(41.33% 0.169 263.9)
XYZ	xyz(8.9992, 6.5765, 36.3851)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1840A5 #A57D18

analogous

#1886A5 #1840A5 #3718A5

triadic

#1840A5 #A51840 #40A518

tetradic

#1840A5 #A51886 #A57D18 #18A537

square

#1840A5 #A51886 #A57D18 #18A537

split-complementary

#1840A5 #A53718 #86A518

monochromatic

#08173A #102B70 #1840A5 #2055DA #527CE6

Accessibility & contrast

On white

9.07

#1840A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1840A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1840A5

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1840A5	#FFFFFF	#000000	##FFFFFF
##1840A5	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0042A3

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1840a5;
/* rgb */ color: rgb(24, 64, 165);
/* oklch */ color: oklch(41.3% 0.169 263.9);

Tailwind

colors: {
  custom: {
    50: '#7074c1',
    500: '#1840a5',
    950: '#000000',
  },
}

SCSS

$custom: #1840a5;
$custom-light: #7074c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1840a5",
  "rgb": {
    "r": 24,
    "g": 64,
    "b": 165
  },
  "hsl": {
    "h": 222.979,
    "s": 74.603,
    "l": 37.059
  },
  "oklch": {
    "l": 0.41326,
    "c": 0.16898,
    "h": 263.9
  },
  "luminance": 0.06578
}

Semantic roles & 50–950 ramp

primary

#1840A5

secondary

#C8A651

accent

#BC37F1

background

#F7F7FC

surface

#EDEDF8

border

#C8C8D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1840A5

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

Preview Lab → · Contrast checker → · Palette generator →