#04043F#04043F

#04043F is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.9% C 0.107 H 268.6°. Best body text is #FFFFFF at 19.19:1 contrast (WCAG AA passes).

Color values

HEX	#04043F
RGB	rgb(4, 4, 63)
HSL	hsl(240, 88%, 13%)
HSV	hsv(240, 94%, 25%)
CMYK	cmyk(93.7%, 93.7%, 0%, 75.3%)
CIE-LAB	lab(4.26, 21.89, -35.43)
CIE-LCH	lch(4.26, 41.65, 301.71°)
OKLab	oklab(17.88% -0.0025 -0.1066)
OKLCH	oklch(17.88% 0.107 268.6)
XYZ	xyz(0.9904, 0.4714, 4.7405)
Luminance	0.0047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Night Blue

#040348

ΔE00 2.43

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04043F #3F3F04

analogous

#04213F #04043F #21043F

triadic

#04043F #3F0404 #043F04

tetradic

#04043F #3F0421 #3F3F04 #043F21

square

#04043F #3F0421 #3F3F04 #043F21

split-complementary

#04043F #3F2104 #213F04

monochromatic

#02021D #02021D #04043F #080879 #0B0BB2

Accessibility & contrast

On white

19.19

#04043F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#04043F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04043F

19.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04043F	#FFFFFF	#000000	##FFFFFF
##04043F	1.00	19.19	1.09	19.19
#FFFFFF	19.19	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001241

Deuteranopia (green-blind)

#000C3E

Tritanopia (blue-blind)

#001722

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #04043f;
/* rgb */ color: rgb(4, 4, 63);
/* oklch */ color: oklch(17.9% 0.107 268.6);

Tailwind

colors: {
  custom: {
    50: '#514775',
    500: '#04043f',
    950: '#000000',
  },
}

SCSS

$custom: #04043f;
$custom-light: #514775;
$custom-dark: #000000;

JSON

{
  "hex": "#04043f",
  "rgb": {
    "r": 4,
    "g": 4,
    "b": 63
  },
  "hsl": {
    "h": 240,
    "s": 88.06,
    "l": 13.137
  },
  "oklch": {
    "l": 0.1788,
    "c": 0.10663,
    "h": 268.6
  },
  "luminance": 0.00472
}

Semantic roles & 50–950 ramp

primary

#04043F

secondary

#80801E

accent

#FE2AFE

background

#F4F4F7

surface

#E7E6ED

border

#C3C2C8

text

#030008

muted

#78777B

Preview Lab

Preview with #04043F

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

Preview Lab → · Contrast checker → · Palette generator →