#040633#040633

#040633 is a very dark, moderate blue. Relative luminance 0.004; OKLCH L 16.6% C 0.087 H 269.6°. Best body text is #FFFFFF at 19.46:1 contrast (WCAG AA passes).

Color values

HEX	#040633
RGB	rgb(4, 6, 51)
HSL	hsl(237, 85%, 11%)
HSV	hsv(237, 92%, 20%)
CMYK	cmyk(92.2%, 88.2%, 0%, 80%)
CIE-LAB	lab(3.57, 13.81, -27.79)
CIE-LCH	lch(3.57, 31.03, 296.42°)
OKLab	oklab(16.6% -0.0006 -0.0866)
OKLCH	oklch(16.6% 0.087 269.6)
XYZ	xyz(0.7125, 0.3950, 3.1700)
Luminance	0.0040 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#040633 #333104

analogous

#041D33 #040633 #190433

triadic

#040633 #330406 #063304

tetradic

#040633 #33041D #333104 #043319

square

#040633 #33041D #333104 #043319

split-complementary

#040633 #331904 #1D3304

monochromatic

#02031C #02031C #040633 #080D6C #0D13A4

Accessibility & contrast

On white

19.46

#040633 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.08

#040633 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #040633

19.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##040633	#FFFFFF	#000000	##FFFFFF
##040633	1.00	19.46	1.08	19.46
#FFFFFF	19.46	1.00	21.00	1.00
#000000	1.08	21.00	1.00	21.00
##FFFFFF	19.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000F34

Deuteranopia (green-blind)

#000A32

Tritanopia (blue-blind)

#00131C

Achromatopsia (no color)

#0D0D0D

Design tokens & code

CSS

--color: #040633;
/* rgb */ color: rgb(4, 6, 51);
/* oklch */ color: oklch(16.6% 0.087 269.6);

Tailwind

colors: {
  custom: {
    50: '#4b496b',
    500: '#040633',
    950: '#000000',
  },
}

SCSS

$custom: #040633;
$custom-light: #4b496b;
$custom-dark: #000000;

JSON

{
  "hex": "#040633",
  "rgb": {
    "r": 4,
    "g": 6,
    "b": 51
  },
  "hsl": {
    "h": 237.447,
    "s": 85.455,
    "l": 10.784
  },
  "oklch": {
    "l": 0.166,
    "c": 0.08665,
    "h": 269.6
  },
  "luminance": 0.00395
}

Semantic roles & 50–950 ramp

primary

#040633

secondary

#75721D

accent

#F32CFC

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010007

muted

#77777A

Preview Lab

Preview with #040633

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

Preview Lab → · Contrast checker → · Palette generator →