#04123B#04123B

#04123B is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.2% C 0.082 H 264.3°. Best body text is #FFFFFF at 18.18:1 contrast (WCAG AA passes).

Color values

HEX	#04123B
RGB	rgb(4, 18, 59)
HSL	hsl(225, 87%, 12%)
HSV	hsv(225, 93%, 23%)
CMYK	cmyk(93.2%, 69.5%, 0%, 76.9%)
CIE-LAB	lab(6.99, 12.45, -28.10)
CIE-LCH	lch(6.99, 30.73, 293.89°)
OKLab	oklab(20.25% -0.0082 -0.0815)
OKLCH	oklch(20.25% 0.082 264.3)
XYZ	xyz(1.0555, 0.7741, 4.2306)
Luminance	0.0077 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04123B #3B2D04

analogous

#042E3B #04123B #11043B

triadic

#04123B #3B0412 #123B04

tetradic

#04123B #3B042E #3B2D04 #043B11

square

#04123B #3B042E #3B2D04 #043B11

split-complementary

#04123B #3B1104 #2E3B04

monochromatic

#02091D #02091D #04123B #082374 #0C35AE

Accessibility & contrast

On white

18.18

#04123B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#04123B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04123B

18.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04123B	#FFFFFF	#000000	##FFFFFF
##04123B	1.00	18.18	1.15	18.18
#FFFFFF	18.18	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00183C

Deuteranopia (green-blind)

#00133A

Tritanopia (blue-blind)

#001D24

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #04123b;
/* rgb */ color: rgb(4, 18, 59);
/* oklch */ color: oklch(20.2% 0.082 264.3);

Tailwind

colors: {
  custom: {
    50: '#4f4f71',
    500: '#04123b',
    950: '#000000',
  },
}

SCSS

$custom: #04123b;
$custom-light: #4f4f71;
$custom-dark: #000000;

JSON

{
  "hex": "#04123b",
  "rgb": {
    "r": 4,
    "g": 18,
    "b": 59
  },
  "hsl": {
    "h": 224.727,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.20249,
    "c": 0.08193,
    "h": 264.3
  },
  "luminance": 0.00774
}

Semantic roles & 50–950 ramp

primary

#04123B

secondary

#7D651E

accent

#C82AFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020108

muted

#78777B

Preview Lab

Preview with #04123B

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

Preview Lab → · Contrast checker → · Palette generator →