#183FCA#183FCA

#183FCA is a dark, highly saturated blue. Relative luminance 0.080; OKLCH L 44.7% C 0.217 H 265.2°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).

Color values

HEX	#183FCA
RGB	rgb(24, 63, 202)
HSL	hsl(227, 79%, 44%)
HSV	hsv(227, 88%, 79%)
CMYK	cmyk(88.1%, 68.8%, 0%, 20.8%)
CIE-LAB	lab(34.01, 40.81, -74.72)
CIE-LCH	lch(34.01, 85.14, 298.64°)
OKLab	oklab(44.72% -0.0181 -0.2167)
OKLCH	oklch(44.72% 0.217 265.2)
XYZ	xyz(12.8111, 8.0118, 56.7369)
Luminance	0.0801 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.81

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183FCA #CAA318

analogous

#1898CA #183FCA #4A18CA

triadic

#183FCA #CA183F #3FCA18

tetradic

#183FCA #CA1898 #CAA318 #18CA4A

square

#183FCA #CA1898 #CAA318 #18CA4A

split-complementary

#183FCA #CA4A18 #98CA18

monochromatic

#0B1D5D #122E93 #183FCA #385EE7 #6F8AEE

Accessibility & contrast

On white

8.07

#183FCA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#183FCA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183FCA

8.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183FCA	#FFFFFF	#000000	##FFFFFF
##183FCA	1.00	8.07	2.60	8.07
#FFFFFF	8.07	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058CE

Deuteranopia (green-blind)

#0048C7

Tritanopia (blue-blind)

#00667F

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #183fca;
/* rgb */ color: rgb(24, 63, 202);
/* oklch */ color: oklch(44.7% 0.217 265.2);

Tailwind

colors: {
  custom: {
    50: '#7b74db',
    500: '#183fca',
    950: '#000000',
  },
}

SCSS

$custom: #183fca;
$custom-light: #7b74db;
$custom-dark: #000000;

JSON

{
  "hex": "#183fca",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 202
  },
  "hsl": {
    "h": 226.854,
    "s": 78.761,
    "l": 44.314
  },
  "oklch": {
    "l": 0.44717,
    "c": 0.21746,
    "h": 265.2
  },
  "luminance": 0.08013
}

Semantic roles & 50–950 ramp

primary

#183FCA

secondary

#D4BD6A

accent

#CB33F5

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0815

muted

#7D7B83

Preview Lab

Preview with #183FCA

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

Preview Lab → · Contrast checker → · Palette generator →