#12378E#12378E

#12378E is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.2% C 0.150 H 263.4°. Best body text is #FFFFFF at 10.70:1 contrast (WCAG AA passes).

Color values

HEX	#12378E
RGB	rgb(18, 55, 142)
HSL	hsl(222, 78%, 31%)
HSV	hsv(222, 87%, 56%)
CMYK	cmyk(87.3%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(26.20, 22.55, -51.60)
CIE-LCH	lch(26.20, 56.32, 293.61°)
OKLab	oklab(37.2% -0.0173 -0.1493)
OKLCH	oklch(37.2% 0.15 263.4)
XYZ	xyz(6.4964, 4.8132, 26.1726)
Luminance	0.0481 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12378E #8E6912

analogous

#12758E #12378E #2B128E

triadic

#12378E #8E1237 #378E12

tetradic

#12378E #8E1275 #8E6912 #128E2B

square

#12378E #8E1275 #8E6912 #128E2B

split-complementary

#12378E #8E2B12 #758E12

monochromatic

#040D21 #0B2258 #12378E #194CC4 #356AE5

Accessibility & contrast

On white

10.70

#12378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#12378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12378E

10.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12378E	#FFFFFF	#000000	##FFFFFF
##12378E	1.00	10.70	1.96	10.70
#FFFFFF	10.70	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004491

Deuteranopia (green-blind)

#00388C

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #12378e;
/* rgb */ color: rgb(18, 55, 142);
/* oklch */ color: oklch(37.2% 0.150 263.4);

Tailwind

colors: {
  custom: {
    50: '#696db0',
    500: '#12378e',
    950: '#000000',
  },
}

SCSS

$custom: #12378e;
$custom-light: #696db0;
$custom-dark: #000000;

JSON

{
  "hex": "#12378e",
  "rgb": {
    "r": 18,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 222.097,
    "s": 77.5,
    "l": 31.373
  },
  "oklch": {
    "l": 0.372,
    "c": 0.15033,
    "h": 263.4
  },
  "luminance": 0.04814
}

Semantic roles & 50–950 ramp

primary

#12378E

secondary

#C2993A

accent

#BB34F4

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#080711

muted

#7A7A80

Preview Lab

Preview with #12378E

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

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