#1840B4#1840B4

#1840B4 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.7% C 0.189 H 264.6°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#1840B4
RGB	rgb(24, 64, 180)
HSL	hsl(225, 76%, 40%)
HSV	hsv(225, 87%, 71%)
CMYK	cmyk(86.7%, 64.4%, 0%, 29.4%)
CIE-LAB	lab(32.16, 31.92, -64.84)
CIE-LCH	lch(32.16, 72.27, 296.21°)
OKLab	oklab(42.73% -0.0177 -0.1879)
OKLCH	oklch(42.73% 0.189 264.6)
XYZ	xyz(10.4454, 7.1549, 44.0017)
Luminance	0.0716 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1840B4 #B48C18

analogous

#188EB4 #1840B4 #3E18B4

triadic

#1840B4 #B41840 #40B418

tetradic

#1840B4 #B4188E #B48C18 #18B43E

square

#1840B4 #B4188E #B48C18 #18B43E

split-complementary

#1840B4 #B43E18 #8EB418

monochromatic

#0A1A48 #112D7E #1840B4 #2757E2 #5D81E9

Accessibility & contrast

On white

8.64

#1840B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1840B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1840B4

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1840B4	#FFFFFF	#000000	##FFFFFF
##1840B4	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1840b4;
/* rgb */ color: rgb(24, 64, 180);
/* oklch */ color: oklch(42.7% 0.189 264.6);

Tailwind

colors: {
  custom: {
    50: '#7574cc',
    500: '#1840b4',
    950: '#000000',
  },
}

SCSS

$custom: #1840b4;
$custom-light: #7574cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1840b4",
  "rgb": {
    "r": 24,
    "g": 64,
    "b": 180
  },
  "hsl": {
    "h": 224.615,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.42728,
    "c": 0.18871,
    "h": 264.6
  },
  "luminance": 0.07156
}

Semantic roles & 50–950 ramp

primary

#1840B4

secondary

#CDB05B

accent

#C235F3

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1840B4

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

Preview Lab → · Contrast checker → · Palette generator →