#10123A#10123A

#10123A is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 21.0% C 0.076 H 275.5°. Best body text is #FFFFFF at 17.95:1 contrast (WCAG AA passes).

Color values

HEX	#10123A
RGB	rgb(16, 18, 58)
HSL	hsl(237, 57%, 15%)
HSV	hsv(237, 72%, 23%)
CMYK	cmyk(72.4%, 69%, 0%, 77.3%)
CIE-LAB	lab(7.66, 14.23, -26.26)
CIE-LCH	lch(7.66, 29.86, 298.45°)
OKLab	oklab(20.97% 0.0073 -0.0756)
OKLCH	oklch(20.97% 0.076 275.5)
XYZ	xyz(1.1935, 0.8482, 4.1030)
Luminance	0.0085 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.84

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10123A #3A3810

analogous

#10273A #10123A #23103A

triadic

#10123A #3A1012 #123A10

tetradic

#10123A #3A1027 #3A3810 #103A23

square

#10123A #3A1027 #3A3810 #103A23

split-complementary

#10123A #3A2310 #273A10

monochromatic

#070718 #070718 #10123A #1D216A #2A309A

Accessibility & contrast

On white

17.95

#10123A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#10123A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10123A

17.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10123A	#FFFFFF	#000000	##FFFFFF
##10123A	1.00	17.95	1.17	17.95
#FFFFFF	17.95	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00193B

Deuteranopia (green-blind)

#001539

Tritanopia (blue-blind)

#001C23

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #10123a;
/* rgb */ color: rgb(16, 18, 58);
/* oklch */ color: oklch(21.0% 0.076 275.5);

Tailwind

colors: {
  custom: {
    50: '#544f70',
    500: '#10123a',
    950: '#000000',
  },
}

SCSS

$custom: #10123a;
$custom-light: #544f70;
$custom-dark: #000000;

JSON

{
  "hex": "#10123a",
  "rgb": {
    "r": 16,
    "g": 18,
    "b": 58
  },
  "hsl": {
    "h": 237.143,
    "s": 56.757,
    "l": 14.51
  },
  "oklch": {
    "l": 0.20965,
    "c": 0.07591,
    "h": 275.5
  },
  "luminance": 0.00848
}

Semantic roles & 50–950 ramp

primary

#10123A

secondary

#747132

accent

#D948E0

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #10123A

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

Preview Lab → · Contrast checker → · Palette generator →