#1F105B#1F105B

#1F105B is a dark, vivid violet. Relative luminance 0.014; OKLCH L 25.6% C 0.124 H 282.4°. Best body text is #FFFFFF at 16.36:1 contrast (WCAG AA passes).

Color values

HEX	#1F105B
RGB	rgb(31, 16, 91)
HSL	hsl(252, 70%, 21%)
HSV	hsv(252, 82%, 36%)
CMYK	cmyk(65.9%, 82.4%, 0%, 64.3%)
CIE-LAB	lab(12.07, 30.39, -41.93)
CIE-LCH	lch(12.07, 51.79, 305.94°)
OKLab	oklab(25.55% 0.0265 -0.1209)
OKLCH	oklch(25.55% 0.124 282.4)
XYZ	xyz(2.6381, 1.4170, 10.0300)
Luminance	0.0142 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F105B #4C5B10

analogous

#10265B #1F105B #44105B

triadic

#1F105B #5B1F10 #105B1F

tetradic

#1F105B #5B1026 #4C5B10 #105B44

square

#1F105B #5B1026 #4C5B10 #105B44

split-complementary

#1F105B #5B4410 #265B10

monochromatic

#09051A #0D0727 #1F105B #31198F #4222C3

Accessibility & contrast

On white

16.36

#1F105B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#1F105B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F105B

16.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F105B	#FFFFFF	#000000	##FFFFFF
##1F105B	1.00	16.36	1.28	16.36
#FFFFFF	16.36	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00225D

Deuteranopia (green-blind)

#001D5A

Tritanopia (blue-blind)

#002635

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #1f105b;
/* rgb */ color: rgb(31, 16, 91);
/* oklch */ color: oklch(25.6% 0.124 282.4);

Tailwind

colors: {
  custom: {
    50: '#64508a',
    500: '#1f105b',
    950: '#000000',
  },
}

SCSS

$custom: #1f105b;
$custom-light: #64508a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f105b",
  "rgb": {
    "r": 31,
    "g": 16,
    "b": 91
  },
  "hsl": {
    "h": 252,
    "s": 70.093,
    "l": 20.98
  },
  "oklch": {
    "l": 0.25552,
    "c": 0.12379,
    "h": 282.4
  },
  "luminance": 0.01417
}

Semantic roles & 50–950 ramp

primary

#1F105B

secondary

#819433

accent

#ED3BC9

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1F105B

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

Preview Lab → · Contrast checker → · Palette generator →