#101F81#101F81

#101F81 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.3% C 0.162 H 267.3°. Best body text is #FFFFFF at 13.68:1 contrast (WCAG AA passes).

Color values

HEX	#101F81
RGB	rgb(16, 31, 129)
HSL	hsl(232, 78%, 28%)
HSV	hsv(232, 88%, 51%)
CMYK	cmyk(87.6%, 76%, 0%, 49.4%)
CIE-LAB	lab(18.69, 33.54, -55.81)
CIE-LCH	lch(18.69, 65.11, 301.00°)
OKLab	oklab(31.28% -0.0076 -0.1618)
OKLCH	oklch(31.28% 0.162 267.3)
XYZ	xyz(4.6647, 2.6745, 21.0350)
Luminance	0.0267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101F81 #817210

analogous

#105781 #101F81 #391081

triadic

#101F81 #81101F #1F8110

tetradic

#101F81 #811057 #817210 #108139

square

#101F81 #811057 #817210 #108139

split-complementary

#101F81 #813910 #578110

monochromatic

#03071B #09124B #101F81 #172CB7 #2740E4

Accessibility & contrast

On white

13.68

#101F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#101F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101F81

13.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101F81	#FFFFFF	#000000	##FFFFFF
##101F81	1.00	13.68	1.54	13.68
#FFFFFF	13.68	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003384

Deuteranopia (green-blind)

#00287F

Tritanopia (blue-blind)

#003C4E

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #101f81;
/* rgb */ color: rgb(16, 31, 129);
/* oklch */ color: oklch(31.3% 0.162 267.3);

Tailwind

colors: {
  custom: {
    50: '#685ba7',
    500: '#101f81',
    950: '#000000',
  },
}

SCSS

$custom: #101f81;
$custom-light: #685ba7;
$custom-dark: #000000;

JSON

{
  "hex": "#101f81",
  "rgb": {
    "r": 16,
    "g": 31,
    "b": 129
  },
  "hsl": {
    "h": 232.035,
    "s": 77.931,
    "l": 28.431
  },
  "oklch": {
    "l": 0.31284,
    "c": 0.16197,
    "h": 267.3
  },
  "luminance": 0.02675
}

Semantic roles & 50–950 ramp

primary

#101F81

secondary

#B7A636

accent

#DB33F4

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#070410

muted

#7A797F

Preview Lab

Preview with #101F81

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

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