#18387B#18387B

#18387B is a dark, vivid blue. Relative luminance 0.045; OKLCH L 35.9% C 0.120 H 262.7°. Best body text is #FFFFFF at 11.11:1 contrast (WCAG AA passes).

Color values

HEX	#18387B
RGB	rgb(24, 56, 123)
HSL	hsl(221, 67%, 29%)
HSV	hsv(221, 80%, 48%)
CMYK	cmyk(80.5%, 54.5%, 0%, 51.8%)
CIE-LAB	lab(25.11, 14.59, -41.49)
CIE-LCH	lch(25.11, 43.98, 289.37°)
OKLab	oklab(35.95% -0.0153 -0.1195)
OKLCH	oklch(35.95% 0.12 262.7)
XYZ	xyz(5.3647, 4.4520, 19.3116)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#18387B #7B5B18

analogous

#186A7B #18387B #2A187B

triadic

#18387B #7B1838 #387B18

tetradic

#18387B #7B186A #7B5B18 #187B2A

square

#18387B #7B186A #7B5B18 #187B2A

split-complementary

#18387B #7B2A18 #6A7B18

monochromatic

#050C1A #0E2148 #18387B #224FAE #366AD8

Accessibility & contrast

On white

11.11

#18387B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#18387B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #18387B

11.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##18387B	#FFFFFF	#000000	##FFFFFF
##18387B	1.00	11.11	1.89	11.11
#FFFFFF	11.11	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08407D

Deuteranopia (green-blind)

#00377A

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #18387b;
/* rgb */ color: rgb(24, 56, 123);
/* oklch */ color: oklch(35.9% 0.120 262.7);

Tailwind

colors: {
  custom: {
    50: '#666ea2',
    500: '#18387b',
    950: '#000000',
  },
}

SCSS

$custom: #18387b;
$custom-light: #666ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#18387b",
  "rgb": {
    "r": 24,
    "g": 56,
    "b": 123
  },
  "hsl": {
    "h": 220.606,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.35947,
    "c": 0.12047,
    "h": 262.7
  },
  "luminance": 0.04453
}

Semantic roles & 50–950 ramp

primary

#18387B

secondary

#B08B3F

accent

#B23EEA

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #18387B

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

Preview Lab → · Contrast checker → · Palette generator →