#101B52#101B52

#101B52 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.4% C 0.101 H 269.1°. Best body text is #FFFFFF at 16.15:1 contrast (WCAG AA passes).

Color values

HEX	#101B52
RGB	rgb(16, 27, 82)
HSL	hsl(230, 67%, 19%)
HSV	hsv(230, 80%, 32%)
CMYK	cmyk(80.5%, 67.1%, 0%, 67.8%)
CIE-LAB	lab(12.63, 17.53, -34.96)
CIE-LCH	lch(12.63, 39.11, 296.63°)
OKLab	oklab(25.36% -0.0016 -0.101)
OKLCH	oklch(25.36% 0.101 269.1)
XYZ	xyz(2.1281, 1.5030, 8.1590)
Luminance	0.0150 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.55

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101B52 #524710

analogous

#103C52 #101B52 #261052

triadic

#101B52 #52101B #1B5210

tetradic

#101B52 #52103C #524710 #105226

square

#101B52 #52103C #524710 #105226

split-complementary

#101B52 #522610 #3C5210

monochromatic

#05081A #060A1F #101B52 #1A2C85 #243DB8

Accessibility & contrast

On white

16.15

#101B52 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#101B52 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101B52

16.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101B52	#FFFFFF	#000000	##FFFFFF
##101B52	1.00	16.15	1.30	16.15
#FFFFFF	16.15	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002454

Deuteranopia (green-blind)

#001E51

Tritanopia (blue-blind)

#002933

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #101b52;
/* rgb */ color: rgb(16, 27, 82);
/* oklch */ color: oklch(25.4% 0.101 269.1);

Tailwind

colors: {
  custom: {
    50: '#5a5783',
    500: '#101b52',
    950: '#000000',
  },
}

SCSS

$custom: #101b52;
$custom-light: #5a5783;
$custom-dark: #000000;

JSON

{
  "hex": "#101b52",
  "rgb": {
    "r": 16,
    "g": 27,
    "b": 82
  },
  "hsl": {
    "h": 230,
    "s": 67.347,
    "l": 19.216
  },
  "oklch": {
    "l": 0.2536,
    "c": 0.101,
    "h": 269.1
  },
  "luminance": 0.01503
}

Semantic roles & 50–950 ramp

primary

#101B52

secondary

#8C7D32

accent

#CD3EEA

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030B

muted

#79787C

Preview Lab

Preview with #101B52

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

Preview Lab → · Contrast checker → · Palette generator →