#12183F#12183F

#12183F is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.0% C 0.074 H 272.6°. Best body text is #FFFFFF at 17.10:1 contrast (WCAG AA passes).

Color values

HEX	#12183F
RGB	rgb(18, 24, 63)
HSL	hsl(232, 56%, 16%)
HSV	hsv(232, 71%, 25%)
CMYK	cmyk(71.4%, 61.9%, 0%, 75.3%)
CIE-LAB	lab(10.11, 12.11, -25.85)
CIE-LCH	lch(10.11, 28.54, 295.10°)
OKLab	oklab(22.98% 0.0034 -0.0742)
OKLCH	oklch(22.98% 0.074 272.6)
XYZ	xyz(1.4730, 1.1406, 4.8442)
Luminance	0.0114 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12183F #3F3912

analogous

#122E3F #12183F #22123F

triadic

#12183F #3F1218 #183F12

tetradic

#12183F #3F122E #3F3912 #123F22

square

#12183F #3F122E #3F3912 #123F22

split-complementary

#12183F #3F2212 #2E3F12

monochromatic

#070918 #070918 #12183F #202A6F #2D3C9E

Accessibility & contrast

On white

17.10

#12183F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#12183F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12183F

17.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12183F	#FFFFFF	#000000	##FFFFFF
##12183F	1.00	17.10	1.23	17.10
#FFFFFF	17.10	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#011E40

Deuteranopia (green-blind)

#001A3E

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #12183f;
/* rgb */ color: rgb(18, 24, 63);
/* oklch */ color: oklch(23.0% 0.074 272.6);

Tailwind

colors: {
  custom: {
    50: '#565474',
    500: '#12183f',
    950: '#000000',
  },
}

SCSS

$custom: #12183f;
$custom-light: #565474;
$custom-dark: #000000;

JSON

{
  "hex": "#12183f",
  "rgb": {
    "r": 18,
    "g": 24,
    "b": 63
  },
  "hsl": {
    "h": 232,
    "s": 55.556,
    "l": 15.882
  },
  "oklch": {
    "l": 0.22977,
    "c": 0.07428,
    "h": 272.6
  },
  "luminance": 0.01141
}

Semantic roles & 50–950 ramp

primary

#12183F

secondary

#786F35

accent

#CB49DF

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #12183F

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

Preview Lab → · Contrast checker → · Palette generator →