#010B31#010B31

#010B31 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.2% C 0.078 H 263.3°. Best body text is #FFFFFF at 19.20:1 contrast (WCAG AA passes).

Color values

HEX	#010B31
RGB	rgb(1, 11, 49)
HSL	hsl(228, 96%, 10%)
HSV	hsv(228, 98%, 19%)
CMYK	cmyk(98%, 77.6%, 0%, 80.8%)
CIE-LAB	lab(4.22, 9.92, -25.26)
CIE-LCH	lch(4.22, 27.14, 291.43°)
OKLab	oklab(17.21% -0.009 -0.0774)
OKLCH	oklch(17.21% 0.078 263.3)
XYZ	xyz(0.6864, 0.4675, 2.9592)
Luminance	0.0047 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.70

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#010B31 #312701

analogous

#012331 #010B31 #0F0131

triadic

#010B31 #31010B #0B3101

tetradic

#010B31 #310123 #312701 #01310F

square

#010B31 #310123 #312701 #01310F

split-complementary

#010B31 #310F01 #233101

monochromatic

#01071E #01071E #010B31 #02186D #0326A9

Accessibility & contrast

On white

19.20

#010B31 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.09

#010B31 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #010B31

19.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##010B31	#FFFFFF	#000000	##FFFFFF
##010B31	1.00	19.20	1.09	19.20
#FFFFFF	19.20	1.00	21.00	1.00
#000000	1.09	21.00	1.00	21.00
##FFFFFF	19.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001132

Deuteranopia (green-blind)

#000C30

Tritanopia (blue-blind)

#00151C

Achromatopsia (no color)

#0F0F0F

Design tokens & code

CSS

--color: #010b31;
/* rgb */ color: rgb(1, 11, 49);
/* oklch */ color: oklch(17.2% 0.078 263.3);

Tailwind

colors: {
  custom: {
    50: '#494b69',
    500: '#010b31',
    950: '#000000',
  },
}

SCSS

$custom: #010b31;
$custom-light: #494b69;
$custom-dark: #000000;

JSON

{
  "hex": "#010b31",
  "rgb": {
    "r": 1,
    "g": 11,
    "b": 49
  },
  "hsl": {
    "h": 227.5,
    "s": 96,
    "l": 9.804
  },
  "oklch": {
    "l": 0.17212,
    "c": 0.07792,
    "h": 263.3
  },
  "luminance": 0.00468
}

Semantic roles & 50–950 ramp

primary

#010B31

secondary

#776317

accent

#D229FF

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#010106

muted

#77777A

Preview Lab

Preview with #010B31

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

Preview Lab → · Contrast checker → · Palette generator →