#101F3F#101F3F

#101F3F is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.6% C 0.064 H 263.5°. Best body text is #FFFFFF at 16.28:1 contrast (WCAG AA passes).

Color values

HEX	#101F3F
RGB	rgb(16, 31, 63)
HSL	hsl(221, 59%, 15%)
HSV	hsv(221, 75%, 25%)
CMYK	cmyk(74.6%, 50.8%, 0%, 75.3%)
CIE-LAB	lab(12.28, 6.27, -22.37)
CIE-LCH	lch(12.28, 23.23, 285.65°)
OKLab	oklab(24.59% -0.0073 -0.0639)
OKLCH	oklch(24.59% 0.064 263.5)
XYZ	xyz(1.6006, 1.4489, 4.8970)
Luminance	0.0145 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101F3F #3F3010

analogous

#10363F #101F3F #18103F

triadic

#101F3F #3F101F #1F3F10

tetradic

#101F3F #3F1036 #3F3010 #103F18

square

#101F3F #3F1036 #3F3010 #103F18

split-complementary

#101F3F #3F1810 #363F10

monochromatic

#060C18 #060C18 #101F3F #1C3770 #294FA1

Accessibility & contrast

On white

16.28

#101F3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#101F3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101F3F

16.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101F3F	#FFFFFF	#000000	##FFFFFF
##101F3F	1.00	16.28	1.29	16.28
#FFFFFF	16.28	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#102240

Deuteranopia (green-blind)

#081E3E

Tritanopia (blue-blind)

#00262B

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #101f3f;
/* rgb */ color: rgb(16, 31, 63);
/* oklch */ color: oklch(24.6% 0.064 263.5);

Tailwind

colors: {
  custom: {
    50: '#545a74',
    500: '#101f3f',
    950: '#000000',
  },
}

SCSS

$custom: #101f3f;
$custom-light: #545a74;
$custom-dark: #000000;

JSON

{
  "hex": "#101f3f",
  "rgb": {
    "r": 16,
    "g": 31,
    "b": 63
  },
  "hsl": {
    "h": 220.851,
    "s": 59.494,
    "l": 15.49
  },
  "oklch": {
    "l": 0.24589,
    "c": 0.06431,
    "h": 263.5
  },
  "luminance": 0.01449
}

Semantic roles & 50–950 ramp

primary

#101F3F

secondary

#796232

accent

#B045E3

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #101F3F

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

Preview Lab → · Contrast checker → · Palette generator →