#12103B#12103B

#12103B is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.8% C 0.080 H 278.9°. Best body text is #FFFFFF at 18.06:1 contrast (WCAG AA passes).

Color values

HEX	#12103B
RGB	rgb(18, 16, 59)
HSL	hsl(243, 57%, 15%)
HSV	hsv(243, 73%, 23%)
CMYK	cmyk(69.5%, 72.9%, 0%, 76.9%)
CIE-LAB	lab(7.36, 16.50, -27.46)
CIE-LCH	lch(7.36, 32.03, 301.00°)
OKLab	oklab(20.81% 0.0124 -0.0791)
OKLCH	oklch(20.81% 0.08 278.9)
XYZ	xyz(1.2239, 0.8149, 4.2296)
Luminance	0.0081 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#12103B #393B10

analogous

#10243B #12103B #28103B

triadic

#12103B #3B1210 #103B12

tetradic

#12103B #3B1024 #393B10 #103B28

square

#12103B #3B1024 #393B10 #103B28

split-complementary

#12103B #3B2810 #243B10

monochromatic

#070718 #070718 #12103B #211D6B #2F2A9B

Accessibility & contrast

On white

18.06

#12103B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.16

#12103B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #12103B

18.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##12103B	#FFFFFF	#000000	##FFFFFF
##12103B	1.00	18.06	1.16	18.06
#FFFFFF	18.06	1.00	21.00	1.00
#000000	1.16	21.00	1.00	21.00
##FFFFFF	18.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00183C

Deuteranopia (green-blind)

#00153A

Tritanopia (blue-blind)

#001B23

Achromatopsia (no color)

#161616

Design tokens & code

CSS

--color: #12103b;
/* rgb */ color: rgb(18, 16, 59);
/* oklch */ color: oklch(20.8% 0.080 278.9);

Tailwind

colors: {
  custom: {
    50: '#554e71',
    500: '#12103b',
    950: '#000000',
  },
}

SCSS

$custom: #12103b;
$custom-light: #554e71;
$custom-dark: #000000;

JSON

{
  "hex": "#12103b",
  "rgb": {
    "r": 18,
    "g": 16,
    "b": 59
  },
  "hsl": {
    "h": 242.791,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.20809,
    "c": 0.08008,
    "h": 278.9
  },
  "luminance": 0.00815
}

Semantic roles & 50–950 ramp

primary

#12103B

secondary

#727532

accent

#E147D9

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030108

muted

#78777B

Preview Lab

Preview with #12103B

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

Preview Lab → · Contrast checker → · Palette generator →