#18388B#18388B

#18388B is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.3% C 0.143 H 264.4°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#18388B
RGB	rgb(24, 56, 139)
HSL	hsl(223, 71%, 32%)
HSV	hsv(223, 83%, 55%)
CMYK	cmyk(82.7%, 59.7%, 0%, 45.5%)
CIE-LAB	lab(26.41, 21.15, -49.39)
CIE-LCH	lch(26.41, 53.73, 293.18°)
OKLab	oklab(37.33% -0.014 -0.1427)
OKLCH	oklch(37.33% 0.143 264.4)
XYZ	xyz(6.4494, 4.8858, 25.0242)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18388B #8B6B18

analogous

#18728B #18388B #31188B

triadic

#18388B #8B1838 #388B18

tetradic

#18388B #8B1872 #8B6B18 #188B31

square

#18388B #8B1872 #8B6B18 #188B31

split-complementary

#18388B #8B3118 #728B18

monochromatic

#060E23 #0F2357 #18388B #214DBF #3F6CDE

Accessibility & contrast

On white

10.62

#18388B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#18388B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18388B

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18388B	#FFFFFF	#000000	##FFFFFF
##18388B	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448E

Deuteranopia (green-blind)

#003989

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #18388b;
/* rgb */ color: rgb(24, 56, 139);
/* oklch */ color: oklch(37.3% 0.143 264.4);

Tailwind

colors: {
  custom: {
    50: '#6a6eae',
    500: '#18388b',
    950: '#000000',
  },
}

SCSS

$custom: #18388b;
$custom-light: #6a6eae;
$custom-dark: #000000;

JSON

{
  "hex": "#18388b",
  "rgb": {
    "r": 24,
    "g": 56,
    "b": 139
  },
  "hsl": {
    "h": 223.304,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.37331,
    "c": 0.14343,
    "h": 264.4
  },
  "luminance": 0.04887
}

Semantic roles & 50–950 ramp

primary

#18388B

secondary

#BE9B40

accent

#BC3AED

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #18388B

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

Preview Lab → · Contrast checker → · Palette generator →