#1F104B#1F104B

#1F104B is a very dark, moderate violet. Relative luminance 0.012; OKLCH L 23.8% C 0.102 H 287.6°. Best body text is #FFFFFF at 17.02:1 contrast (WCAG AA passes).

Color values

HEX	#1F104B
RGB	rgb(31, 16, 75)
HSL	hsl(255, 65%, 18%)
HSV	hsv(255, 79%, 29%)
CMYK	cmyk(58.7%, 78.7%, 0%, 70.6%)
CIE-LAB	lab(10.33, 24.99, -33.85)
CIE-LCH	lch(10.33, 42.08, 306.44°)
OKLab	oklab(23.8% 0.0309 -0.0973)
OKLCH	oklch(23.8% 0.102 287.6)
XYZ	xyz(2.0200, 1.1698, 6.7746)
Luminance	0.0117 (WCAG relative)
Temperature	cool
Family	violet

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F104B #3C4B10

analogous

#101F4B #1F104B #3C104B

triadic

#1F104B #4B1F10 #104B1F

tetradic

#1F104B #4B101F #3C4B10 #104B3C

square

#1F104B #4B101F #3C4B10 #104B3C

split-complementary

#1F104B #4B3C10 #1F4B10

monochromatic

#0A0519 #0A0519 #1F104B #341B7D #4926B0

Accessibility & contrast

On white

17.02

#1F104B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.23

#1F104B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F104B

17.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F104B	#FFFFFF	#000000	##FFFFFF
##1F104B	1.00	17.02	1.23	17.02
#FFFFFF	17.02	1.00	21.00	1.00
#000000	1.23	21.00	1.00	21.00
##FFFFFF	17.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D4D

Deuteranopia (green-blind)

#001B4A

Tritanopia (blue-blind)

#0E202C

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #1f104b;
/* rgb */ color: rgb(31, 16, 75);
/* oklch */ color: oklch(23.8% 0.102 287.6);

Tailwind

colors: {
  custom: {
    50: '#604f7e',
    500: '#1f104b',
    950: '#000000',
  },
}

SCSS

$custom: #1f104b;
$custom-light: #604f7e;
$custom-dark: #000000;

JSON

{
  "hex": "#1f104b",
  "rgb": {
    "r": 31,
    "g": 16,
    "b": 75
  },
  "hsl": {
    "h": 255.254,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.23799,
    "c": 0.10208,
    "h": 287.6
  },
  "luminance": 0.0117
}

Semantic roles & 50–950 ramp

primary

#1F104B

secondary

#708532

accent

#E840BD

background

#F5F4F7

surface

#EAE7EE

border

#C6C3C9

text

#05020A

muted

#79787C

Preview Lab

Preview with #1F104B

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

Preview Lab → · Contrast checker → · Palette generator →