#101551#101551

#101551 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 24.0% C 0.108 H 271.5°. Best body text is #FFFFFF at 16.82:1 contrast (WCAG AA passes).

Color values

HEX	#101551
RGB	rgb(16, 21, 81)
HSL	hsl(235, 67%, 19%)
HSV	hsv(235, 80%, 32%)
CMYK	cmyk(80.2%, 74.1%, 0%, 68.2%)
CIE-LAB	lab(10.85, 21.52, -37.19)
CIE-LCH	lch(10.85, 42.97, 300.06°)
OKLab	oklab(24.03% 0.0029 -0.1076)
OKLCH	oklch(24.03% 0.108 271.5)
XYZ	xyz(1.9666, 1.2404, 7.9188)
Luminance	0.0124 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.71

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101551 #514C10

analogous

#103651 #101551 #2C1051

triadic

#101551 #511015 #155110

tetradic

#101551 #511036 #514C10 #10512C

square

#101551 #511036 #514C10 #10512C

split-complementary

#101551 #512C10 #365110

monochromatic

#05071A #06081E #101551 #1A2284 #242FB7

Accessibility & contrast

On white

16.82

#101551 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#101551 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101551

16.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101551	#FFFFFF	#000000	##FFFFFF
##101551	1.00	16.82	1.25	16.82
#FFFFFF	16.82	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002053

Deuteranopia (green-blind)

#001A50

Tritanopia (blue-blind)

#002531

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #101551;
/* rgb */ color: rgb(16, 21, 81);
/* oklch */ color: oklch(24.0% 0.108 271.5);

Tailwind

colors: {
  custom: {
    50: '#5a5283',
    500: '#101551',
    950: '#000000',
  },
}

SCSS

$custom: #101551;
$custom-light: #5a5283;
$custom-dark: #000000;

JSON

{
  "hex": "#101551",
  "rgb": {
    "r": 16,
    "g": 21,
    "b": 81
  },
  "hsl": {
    "h": 235.385,
    "s": 67.01,
    "l": 19.02
  },
  "oklch": {
    "l": 0.24028,
    "c": 0.1076,
    "h": 271.5
  },
  "luminance": 0.01241
}

Semantic roles & 50–950 ramp

primary

#101551

secondary

#8B8432

accent

#DD3EEA

background

#F5F4F8

surface

#E9E7EF

border

#C5C3CA

text

#04020A

muted

#79787C

Preview Lab

Preview with #101551

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

Preview Lab → · Contrast checker → · Palette generator →