#101231#101231

#101231 is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.1% C 0.061 H 276.7°. Best body text is #FFFFFF at 18.21:1 contrast (WCAG AA passes).

Color values

HEX	#101231
RGB	rgb(16, 18, 49)
HSL	hsl(236, 51%, 13%)
HSV	hsv(236, 67%, 19%)
CMYK	cmyk(67.3%, 63.3%, 0%, 80.8%)
CIE-LAB	lab(6.91, 10.25, -20.92)
CIE-LCH	lch(6.91, 23.30, 296.10°)
OKLab	oklab(20.11% 0.0071 -0.0601)
OKLCH	oklch(20.11% 0.061 276.7)
XYZ	xyz(0.9842, 0.7645, 3.0008)
Luminance	0.0076 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.65

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101231 #312F10

analogous

#102231 #101231 #1E1031

triadic

#101231 #311012 #123110

tetradic

#101231 #311022 #312F10 #10311E

square

#101231 #311022 #312F10 #10311E

split-complementary

#101231 #311E10 #223110

monochromatic

#080817 #080817 #101231 #1F235F #2E348D

Accessibility & contrast

On white

18.21

#101231 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.15

#101231 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101231

18.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101231	#FFFFFF	#000000	##FFFFFF
##101231	1.00	18.21	1.15	18.21
#FFFFFF	18.21	1.00	21.00	1.00
#000000	1.15	21.00	1.00	21.00
##FFFFFF	18.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031732

Deuteranopia (green-blind)

#001430

Tritanopia (blue-blind)

#02191F

Achromatopsia (no color)

#151515

Design tokens & code

CSS

--color: #101231;
/* rgb */ color: rgb(16, 18, 49);
/* oklch */ color: oklch(20.1% 0.061 276.7);

Tailwind

colors: {
  custom: {
    50: '#524f69',
    500: '#101231',
    950: '#000000',
  },
}

SCSS

$custom: #101231;
$custom-light: #524f69;
$custom-dark: #000000;

JSON

{
  "hex": "#101231",
  "rgb": {
    "r": 16,
    "g": 18,
    "b": 49
  },
  "hsl": {
    "h": 236.364,
    "s": 50.769,
    "l": 12.745
  },
  "oklch": {
    "l": 0.2011,
    "c": 0.06053,
    "h": 276.7
  },
  "luminance": 0.00765
}

Semantic roles & 50–950 ramp

primary

#101231

secondary

#6A6733

accent

#D24EDA

background

#F4F4F6

surface

#E7E7EB

border

#C3C3C6

text

#020206

muted

#78787A

Preview Lab

Preview with #101231

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

Preview Lab → · Contrast checker → · Palette generator →