#040B30#040B30

#040B30 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.4% C 0.074 H 267.4°. Best body text is #FFFFFF at 19.16:1 contrast (WCAG AA passes).

Color values

HEX	#040B30
RGB	rgb(4, 11, 48)
HSL	hsl(230, 85%, 10%)
HSV	hsv(230, 92%, 19%)
CMYK	cmyk(91.7%, 77.1%, 0%, 81.2%)
CIE-LAB	lab(4.32, 10.17, -24.35)
CIE-LCH	lch(4.32, 26.39, 292.67°)
OKLab	oklab(17.36% -0.0033 -0.0743)
OKLCH	oklch(17.36% 0.074 267.4)
XYZ	xyz(0.7031, 0.4785, 2.8510)
Luminance	0.0048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.76

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040B30 #302904

analogous

#042130 #040B30 #130430

triadic

#040B30 #30040B #0B3004

tetradic

#040B30 #300421 #302904 #043013

square

#040B30 #300421 #302904 #043013

split-complementary

#040B30 #301304 #213004

monochromatic

#02061C #02061C #040B30 #091868 #0D25A1

Accessibility & contrast

On white

19.16

#040B30 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.10

#040B30 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040B30

19.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040B30	#FFFFFF	#000000	##FFFFFF
##040B30	1.00	19.16	1.10	19.16
#FFFFFF	19.16	1.00	21.00	1.00
#000000	1.10	21.00	1.00	21.00
##FFFFFF	19.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001131

Deuteranopia (green-blind)

#000D2F

Tritanopia (blue-blind)

#00151C

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #040b30;
/* rgb */ color: rgb(4, 11, 48);
/* oklch */ color: oklch(17.4% 0.074 267.4);

Tailwind

colors: {
  custom: {
    50: '#4b4b68',
    500: '#040b30',
    950: '#000000',
  },
}

SCSS

$custom: #040b30;
$custom-light: #4b4b68;
$custom-dark: #000000;

JSON

{
  "hex": "#040b30",
  "rgb": {
    "r": 4,
    "g": 11,
    "b": 48
  },
  "hsl": {
    "h": 230.455,
    "s": 84.615,
    "l": 10.196
  },
  "oklch": {
    "l": 0.17363,
    "c": 0.07441,
    "h": 267.4
  },
  "luminance": 0.00479
}

Semantic roles & 50–950 ramp

primary

#040B30

secondary

#72651D

accent

#DA2DFB

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #040B30

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

Preview Lab → · Contrast checker → · Palette generator →