#12378D#12378D

#12378D is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.149 H 263.3°. Best body text is #FFFFFF at 10.73:1 contrast (WCAG AA passes).

Color values

HEX	#12378D
RGB	rgb(18, 55, 141)
HSL	hsl(222, 77%, 31%)
HSV	hsv(222, 87%, 55%)
CMYK	cmyk(87.2%, 61%, 0%, 44.7%)
CIE-LAB	lab(26.11, 22.14, -51.13)
CIE-LCH	lch(26.11, 55.72, 293.42°)
OKLab	oklab(37.11% -0.0173 -0.1479)
OKLCH	oklch(37.11% 0.149 263.3)
XYZ	xyz(6.4216, 4.7833, 25.7789)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12378D #8D6812

analogous

#12748D #12378D #2A128D

triadic

#12378D #8D1237 #378D12

tetradic

#12378D #8D1274 #8D6812 #128D2A

square

#12378D #8D1274 #8D6812 #128D2A

split-complementary

#12378D #8D2A12 #748D12

monochromatic

#040D20 #0B2257 #12378D #194CC3 #3469E5

Accessibility & contrast

On white

10.73

#12378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#12378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12378D

10.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12378D	#FFFFFF	#000000	##FFFFFF
##12378D	1.00	10.73	1.96	10.73
#FFFFFF	10.73	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#00388B

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #12378d;
/* rgb */ color: rgb(18, 55, 141);
/* oklch */ color: oklch(37.1% 0.149 263.3);

Tailwind

colors: {
  custom: {
    50: '#696daf',
    500: '#12378d',
    950: '#000000',
  },
}

SCSS

$custom: #12378d;
$custom-light: #696daf;
$custom-dark: #000000;

JSON

{
  "hex": "#12378d",
  "rgb": {
    "r": 18,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 221.951,
    "s": 77.358,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37107,
    "c": 0.14894,
    "h": 263.3
  },
  "luminance": 0.04784
}

Semantic roles & 50–950 ramp

primary

#12378D

secondary

#C19839

accent

#BA34F4

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #12378D

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

Preview Lab → · Contrast checker → · Palette generator →