#05123A#05123A

#05123A is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.2% C 0.080 H 265.1°. Best body text is #FFFFFF at 18.20:1 contrast (WCAG AA passes).

Color values

HEX	#05123A
RGB	rgb(5, 18, 58)
HSL	hsl(225, 84%, 12%)
HSV	hsv(225, 91%, 23%)
CMYK	cmyk(91.4%, 69%, 0%, 77.3%)
CIE-LAB	lab(6.96, 12.13, -27.43)
CIE-LCH	lch(6.96, 29.99, 293.86°)
OKLab	oklab(20.21% -0.0069 -0.0795)
OKLCH	oklch(20.21% 0.08 265.1)
XYZ	xyz(1.0423, 0.7702, 4.0959)
Luminance	0.0077 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#05123A #3A2D05

analogous

#052D3A #05123A #13053A

triadic

#05123A #3A0512 #123A05

tetradic

#05123A #3A052D #3A2D05 #053A13

square

#05123A #3A052D #3A2D05 #053A13

split-complementary

#05123A #3A1305 #2D3A05

monochromatic

#02091C #02091C #05123A #0A2372 #0F35AB

Accessibility & contrast

On white

18.20

#05123A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#05123A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #05123A

18.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##05123A	#FFFFFF	#000000	##FFFFFF
##05123A	1.00	18.20	1.15	18.20
#FFFFFF	18.20	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00183B

Deuteranopia (green-blind)

#001339

Tritanopia (blue-blind)

#001C23

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #05123a;
/* rgb */ color: rgb(5, 18, 58);
/* oklch */ color: oklch(20.2% 0.080 265.1);

Tailwind

colors: {
  custom: {
    50: '#4f4f71',
    500: '#05123a',
    950: '#000000',
  },
}

SCSS

$custom: #05123a;
$custom-light: #4f4f71;
$custom-dark: #000000;

JSON

{
  "hex": "#05123a",
  "rgb": {
    "r": 5,
    "g": 18,
    "b": 58
  },
  "hsl": {
    "h": 225.283,
    "s": 84.127,
    "l": 12.353
  },
  "oklch": {
    "l": 0.20207,
    "c": 0.07985,
    "h": 265.1
  },
  "luminance": 0.0077
}

Semantic roles & 50–950 ramp

primary

#05123A

secondary

#7B6520

accent

#C82DFA

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020107

muted

#78777A

Preview Lab

Preview with #05123A

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

Preview Lab → · Contrast checker → · Palette generator →