#101740#101740

#101740 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.7% C 0.078 H 271.4°. Best body text is #FFFFFF at 17.23:1 contrast (WCAG AA passes).

Color values

HEX	#101740
RGB	rgb(16, 23, 64)
HSL	hsl(231, 60%, 16%)
HSV	hsv(231, 75%, 25%)
CMYK	cmyk(75%, 64.1%, 0%, 74.9%)
CIE-LAB	lab(9.74, 12.91, -27.16)
CIE-LCH	lch(9.74, 30.07, 295.42°)
OKLab	oklab(22.69% 0.002 -0.0781)
OKLCH	oklch(22.69% 0.078 271.4)
XYZ	xyz(1.4452, 1.0930, 4.9843)
Luminance	0.0109 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101740 #403910

analogous

#102F40 #101740 #211040

triadic

#101740 #401017 #174010

tetradic

#101740 #40102F #403910 #104021

square

#101740 #40102F #403910 #104021

split-complementary

#101740 #402110 #2F4010

monochromatic

#060918 #060918 #101740 #1C2971 #283AA2

Accessibility & contrast

On white

17.23

#101740 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#101740 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101740

17.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101740	#FFFFFF	#000000	##FFFFFF
##101740	1.00	17.23	1.22	17.23
#FFFFFF	17.23	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D41

Deuteranopia (green-blind)

#00193F

Tritanopia (blue-blind)

#002128

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #101740;
/* rgb */ color: rgb(16, 23, 64);
/* oklch */ color: oklch(22.7% 0.078 271.4);

Tailwind

colors: {
  custom: {
    50: '#555375',
    500: '#101740',
    950: '#000000',
  },
}

SCSS

$custom: #101740;
$custom-light: #555375;
$custom-dark: #000000;

JSON

{
  "hex": "#101740",
  "rgb": {
    "r": 16,
    "g": 23,
    "b": 64
  },
  "hsl": {
    "h": 231.25,
    "s": 60,
    "l": 15.686
  },
  "oklch": {
    "l": 0.2269,
    "c": 0.07815,
    "h": 271.4
  },
  "luminance": 0.01093
}

Semantic roles & 50–950 ramp

primary

#101740

secondary

#7A6F32

accent

#CC45E3

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#030208

muted

#78787B

Preview Lab

Preview with #101740

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

Preview Lab → · Contrast checker → · Palette generator →