#183EA1#183EA1

#183EA1 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.6% C 0.166 H 264.2°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#183EA1
RGB	rgb(24, 62, 161)
HSL	hsl(223, 74%, 36%)
HSV	hsv(223, 85%, 63%)
CMYK	cmyk(85.1%, 61.5%, 0%, 36.9%)
CIE-LAB	lab(29.94, 25.84, -57.09)
CIE-LCH	lch(29.94, 62.67, 294.35°)
OKLab	oklab(40.56% -0.0169 -0.1652)
OKLCH	oklch(40.56% 0.166 264.2)
XYZ	xyz(8.5300, 6.2116, 34.4607)
Luminance	0.0621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183EA1 #A17B18

analogous

#1883A1 #183EA1 #3718A1

triadic

#183EA1 #A1183E #3EA118

tetradic

#183EA1 #A11883 #A17B18 #18A137

square

#183EA1 #A11883 #A17B18 #18A137

split-complementary

#183EA1 #A13718 #83A118

monochromatic

#081536 #10296C #183EA1 #2053D6 #4F78E5

Accessibility & contrast

On white

9.36

#183EA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#183EA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183EA1

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183EA1	#FFFFFF	#000000	##FFFFFF
##183EA1	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA4

Deuteranopia (green-blind)

#00409F

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #183ea1;
/* rgb */ color: rgb(24, 62, 161);
/* oklch */ color: oklch(40.6% 0.166 264.2);

Tailwind

colors: {
  custom: {
    50: '#7072be',
    500: '#183ea1',
    950: '#000000',
  },
}

SCSS

$custom: #183ea1;
$custom-light: #7072be;
$custom-dark: #000000;

JSON

{
  "hex": "#183ea1",
  "rgb": {
    "r": 24,
    "g": 62,
    "b": 161
  },
  "hsl": {
    "h": 223.358,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40561,
    "c": 0.16608,
    "h": 264.2
  },
  "luminance": 0.06213
}

Semantic roles & 50–950 ramp

primary

#183EA1

secondary

#C7A54E

accent

#BD37F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #183EA1

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

Preview Lab → · Contrast checker → · Palette generator →