#10123B#10123B

#10123B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.1% C 0.078 H 275.4°. Best body text is #FFFFFF at 17.92:1 contrast (WCAG AA passes).

Color values

HEX	#10123B
RGB	rgb(16, 18, 59)
HSL	hsl(237, 57%, 15%)
HSV	hsv(237, 73%, 23%)
CMYK	cmyk(72.9%, 69.5%, 0%, 76.9%)
CIE-LAB	lab(7.75, 14.66, -26.83)
CIE-LCH	lch(7.75, 30.57, 298.65°)
OKLab	oklab(21.07% 0.0073 -0.0772)
OKLCH	oklch(21.07% 0.078 275.4)
XYZ	xyz(1.2192, 0.8584, 4.2383)
Luminance	0.0086 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 3.75

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10123B #3B3910

analogous

#10283B #10123B #24103B

triadic

#10123B #3B1012 #123B10

tetradic

#10123B #3B1028 #3B3910 #103B24

square

#10123B #3B1028 #3B3910 #103B24

split-complementary

#10123B #3B2410 #283B10

monochromatic

#070718 #070718 #10123B #1D216B #2A2F9B

Accessibility & contrast

On white

17.92

#10123B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.17

#10123B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10123B

17.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10123B	#FFFFFF	#000000	##FFFFFF
##10123B	1.00	17.92	1.17	17.92
#FFFFFF	17.92	1.00	21.00	1.00
#000000	1.17	21.00	1.00	21.00
##FFFFFF	17.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00193C

Deuteranopia (green-blind)

#00153A

Tritanopia (blue-blind)

#001C24

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #10123b;
/* rgb */ color: rgb(16, 18, 59);
/* oklch */ color: oklch(21.1% 0.078 275.4);

Tailwind

colors: {
  custom: {
    50: '#544f71',
    500: '#10123b',
    950: '#000000',
  },
}

SCSS

$custom: #10123b;
$custom-light: #544f71;
$custom-dark: #000000;

JSON

{
  "hex": "#10123b",
  "rgb": {
    "r": 16,
    "g": 18,
    "b": 59
  },
  "hsl": {
    "h": 237.209,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.21065,
    "c": 0.07756,
    "h": 275.4
  },
  "luminance": 0.00859
}

Semantic roles & 50–950 ramp

primary

#10123B

secondary

#757232

accent

#D947E1

background

#F5F4F6

surface

#E9E7EC

border

#C5C3C7

text

#030208

muted

#78787B

Preview Lab

Preview with #10123B

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

Preview Lab → · Contrast checker → · Palette generator →