#18428B#18428B

#18428B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.5% C 0.130 H 260.7°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#18428B
RGB	rgb(24, 66, 139)
HSL	hsl(218, 71%, 32%)
HSV	hsv(218, 83%, 55%)
CMYK	cmyk(82.7%, 52.5%, 0%, 45.5%)
CIE-LAB	lab(29.30, 14.18, -44.70)
CIE-LCH	lch(29.30, 46.90, 287.60°)
OKLab	oklab(39.52% -0.0212 -0.1288)
OKLCH	oklch(39.52% 0.13 260.7)
XYZ	xyz(6.9834, 5.9539, 25.2022)
Luminance	0.0595 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18428B #8B6118

analogous

#187C8B #18428B #28188B

triadic

#18428B #8B1842 #428B18

tetradic

#18428B #8B187C #8B6118 #188B28

square

#18428B #8B187C #8B6118 #188B28

split-complementary

#18428B #8B2818 #7C8B18

monochromatic

#061023 #0F2957 #18428B #215BBF #3F79DE

Accessibility & contrast

On white

9.58

#18428B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#18428B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18428B

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18428B	#FFFFFF	#000000	##FFFFFF
##18428B	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124B8E

Deuteranopia (green-blind)

#00408A

Tritanopia (blue-blind)

#005460

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #18428b;
/* rgb */ color: rgb(24, 66, 139);
/* oklch */ color: oklch(39.5% 0.130 260.7);

Tailwind

colors: {
  custom: {
    50: '#6975ad',
    500: '#18428b',
    950: '#000000',
  },
}

SCSS

$custom: #18428b;
$custom-light: #6975ad;
$custom-dark: #000000;

JSON

{
  "hex": "#18428b",
  "rgb": {
    "r": 24,
    "g": 66,
    "b": 139
  },
  "hsl": {
    "h": 218.087,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.39519,
    "c": 0.13049,
    "h": 260.7
  },
  "luminance": 0.05955
}

Semantic roles & 50–950 ramp

primary

#18428B

secondary

#BE9040

accent

#AC3AED

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #18428B

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

Preview Lab → · Contrast checker → · Palette generator →