#183BA1#183BA1

#183BA1 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.0% C 0.170 H 264.8°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#183BA1
RGB	rgb(24, 59, 161)
HSL	hsl(225, 74%, 36%)
HSV	hsv(225, 85%, 63%)
CMYK	cmyk(85.1%, 63.4%, 0%, 36.9%)
CIE-LAB	lab(29.14, 27.88, -58.39)
CIE-LCH	lch(29.14, 64.70, 295.52°)
OKLab	oklab(39.97% -0.0153 -0.1691)
OKLCH	oklch(39.97% 0.17 264.8)
XYZ	xyz(8.3714, 5.8943, 34.4078)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183BA1 #A17E18

analogous

#1880A1 #183BA1 #3A18A1

triadic

#183BA1 #A1183B #3BA118

tetradic

#183BA1 #A11880 #A17E18 #18A13A

square

#183BA1 #A11880 #A17E18 #18A13A

split-complementary

#183BA1 #A13A18 #80A118

monochromatic

#081436 #10276C #183BA1 #204FD6 #4F75E5

Accessibility & contrast

On white

9.64

#183BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#183BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183BA1

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183BA1	#FFFFFF	#000000	##FFFFFF
##183BA1	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA4

Deuteranopia (green-blind)

#003E9F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #183ba1;
/* rgb */ color: rgb(24, 59, 161);
/* oklch */ color: oklch(40.0% 0.170 264.8);

Tailwind

colors: {
  custom: {
    50: '#7070be',
    500: '#183ba1',
    950: '#000000',
  },
}

SCSS

$custom: #183ba1;
$custom-light: #7070be;
$custom-dark: #000000;

JSON

{
  "hex": "#183ba1",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 161
  },
  "hsl": {
    "h": 224.672,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.39969,
    "c": 0.16977,
    "h": 264.8
  },
  "luminance": 0.05895
}

Semantic roles & 50–950 ramp

primary

#183BA1

secondary

#C7A84E

accent

#C137F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183BA1

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

Preview Lab → · Contrast checker → · Palette generator →