#183B90#183B90

#183B90 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.147 H 263.8°. Best body text is #FFFFFF at 10.16:1 contrast (WCAG AA passes).

Color values

HEX	#183B90
RGB	rgb(24, 59, 144)
HSL	hsl(223, 71%, 33%)
HSV	hsv(223, 83%, 56%)
CMYK	cmyk(83.3%, 59%, 0%, 43.5%)
CIE-LAB	lab(27.67, 21.09, -50.43)
CIE-LCH	lch(27.67, 54.66, 292.69°)
OKLab	oklab(38.41% -0.0157 -0.1457)
OKLCH	oklch(38.41% 0.147 263.8)
XYZ	xyz(6.9729, 5.3349, 27.0424)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B90 #906D18

analogous

#187790 #183B90 #311890

triadic

#183B90 #90183B #3B9018

tetradic

#183B90 #901877 #906D18 #189031

square

#183B90 #901877 #906D18 #189031

split-complementary

#183B90 #903118 #779018

monochromatic

#071027 #0F265C #183B90 #2150C4 #4371E0

Accessibility & contrast

On white

10.16

#183B90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#183B90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B90

10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B90	#FFFFFF	#000000	##FFFFFF
##183B90	1.00	10.16	2.07	10.16
#FFFFFF	10.16	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004793

Deuteranopia (green-blind)

#003C8E

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183b90;
/* rgb */ color: rgb(24, 59, 144);
/* oklch */ color: oklch(38.4% 0.147 263.8);

Tailwind

colors: {
  custom: {
    50: '#6b70b1',
    500: '#183b90',
    950: '#000000',
  },
}

SCSS

$custom: #183b90;
$custom-light: #6b70b1;
$custom-dark: #000000;

JSON

{
  "hex": "#183b90",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 144
  },
  "hsl": {
    "h": 222.5,
    "s": 71.429,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38409,
    "c": 0.14657,
    "h": 263.8
  },
  "luminance": 0.05336
}

Semantic roles & 50–950 ramp

primary

#183B90

secondary

#C09C43

accent

#BA3AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #183B90

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

Preview Lab → · Contrast checker → · Palette generator →