#101F3B#101F3B

#101F3B is a very dark, muted blue. Relative luminance 0.014; OKLCH L 24.3% C 0.058 H 261.8°. Best body text is #FFFFFF at 16.39:1 contrast (WCAG AA passes).

Color values

HEX	#101F3B
RGB	rgb(16, 31, 59)
HSL	hsl(219, 57%, 15%)
HSV	hsv(219, 73%, 23%)
CMYK	cmyk(72.9%, 47.5%, 0%, 76.9%)
CIE-LAB	lab(12.00, 4.54, -19.99)
CIE-LCH	lch(12.00, 20.50, 282.80°)
OKLab	oklab(24.28% -0.0082 -0.0569)
OKLCH	oklch(24.28% 0.058 261.8)
XYZ	xyz(1.4928, 1.4058, 4.3295)
Luminance	0.0141 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101F3B #3B2C10

analogous

#10353B #101F3B #17103B

triadic

#101F3B #3B101F #1F3B10

tetradic

#101F3B #3B1035 #3B2C10 #103B17

square

#101F3B #3B1035 #3B2C10 #103B17

split-complementary

#101F3B #3B1710 #353B10

monochromatic

#070D18 #070D18 #101F3B #1D386B #2A529B

Accessibility & contrast

On white

16.39

#101F3B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#101F3B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101F3B

16.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101F3B	#FFFFFF	#000000	##FFFFFF
##101F3B	1.00	16.39	1.28	16.39
#FFFFFF	16.39	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12223C

Deuteranopia (green-blind)

#0C1E3A

Tritanopia (blue-blind)

#00252A

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #101f3b;
/* rgb */ color: rgb(16, 31, 59);
/* oklch */ color: oklch(24.3% 0.058 261.8);

Tailwind

colors: {
  custom: {
    50: '#535a71',
    500: '#101f3b',
    950: '#000000',
  },
}

SCSS

$custom: #101f3b;
$custom-light: #535a71;
$custom-dark: #000000;

JSON

{
  "hex": "#101f3b",
  "rgb": {
    "r": 16,
    "g": 31,
    "b": 59
  },
  "hsl": {
    "h": 219.07,
    "s": 57.333,
    "l": 14.706
  },
  "oklch": {
    "l": 0.24279,
    "c": 0.05752,
    "h": 261.8
  },
  "luminance": 0.01406
}

Semantic roles & 50–950 ramp

primary

#101F3B

secondary

#755E32

accent

#AB47E1

background

#F4F5F6

surface

#E8E9EC

border

#C4C5C7

text

#030307

muted

#78787A

Preview Lab

Preview with #101F3B

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

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