#101F4B#101F4B

#101F4B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.6% C 0.084 H 266.3°. Best body text is #FFFFFF at 15.91:1 contrast (WCAG AA passes).

Color values

HEX	#101F4B
RGB	rgb(16, 31, 75)
HSL	hsl(225, 65%, 18%)
HSV	hsv(225, 79%, 29%)
CMYK	cmyk(78.7%, 58.7%, 0%, 70.6%)
CIE-LAB	lab(13.22, 11.48, -29.21)
CIE-LCH	lch(13.22, 31.38, 291.46°)
OKLab	oklab(25.61% -0.0054 -0.084)
OKLCH	oklch(25.61% 0.084 266.3)
XYZ	xyz(1.9732, 1.5979, 6.8597)
Luminance	0.0160 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#101F4B #4B3C10

analogous

#103C4B #101F4B #1F104B

triadic

#101F4B #4B101F #1F4B10

tetradic

#101F4B #4B103C #4B3C10 #104B1F

square

#101F4B #4B103C #4B3C10 #104B1F

split-complementary

#101F4B #4B1F10 #3C4B10

monochromatic

#050A19 #050A19 #101F4B #1B347D #2649B0

Accessibility & contrast

On white

15.91

#101F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#101F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #101F4B

15.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##101F4B	#FFFFFF	#000000	##FFFFFF
##101F4B	1.00	15.91	1.32	15.91
#FFFFFF	15.91	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03254D

Deuteranopia (green-blind)

#001F4A

Tritanopia (blue-blind)

#002A31

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #101f4b;
/* rgb */ color: rgb(16, 31, 75);
/* oklch */ color: oklch(25.6% 0.084 266.3);

Tailwind

colors: {
  custom: {
    50: '#585a7e',
    500: '#101f4b',
    950: '#000000',
  },
}

SCSS

$custom: #101f4b;
$custom-light: #585a7e;
$custom-dark: #000000;

JSON

{
  "hex": "#101f4b",
  "rgb": {
    "r": 16,
    "g": 31,
    "b": 75
  },
  "hsl": {
    "h": 224.746,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.25605,
    "c": 0.0842,
    "h": 266.3
  },
  "luminance": 0.01598
}

Semantic roles & 50–950 ramp

primary

#101F4B

secondary

#857032

accent

#BD40E8

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #101F4B

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

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