#1F1F8D#1F1F8D

#1F1F8D is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.4% C 0.173 H 271.9°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#1F1F8D
RGB	rgb(31, 31, 141)
HSL	hsl(240, 64%, 34%)
HSV	hsv(240, 78%, 55%)
CMYK	cmyk(78%, 78%, 0%, 44.7%)
CIE-LAB	lab(20.80, 38.90, -59.83)
CIE-LCH	lch(20.80, 71.36, 303.03°)
OKLab	oklab(33.39% 0.0059 -0.1732)
OKLCH	oklch(33.39% 0.173 271.9)
XYZ	xyz(5.8612, 3.1937, 25.5017)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1F8D #8D8D1F

analogous

#1F568D #1F1F8D #561F8D

triadic

#1F1F8D #8D1F1F #1F8D1F

tetradic

#1F1F8D #8D1F56 #8D8D1F #1F8D56

square

#1F1F8D #8D1F56 #8D8D1F #1F8D56

split-complementary

#1F1F8D #8D561F #568D1F

monochromatic

#090929 #14145B #1F1F8D #2A2ABF #4E4ED8

Accessibility & contrast

On white

12.81

#1F1F8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F1F8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1F8D

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1F8D	#FFFFFF	#000000	##FFFFFF
##1F1F8D	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003790

Deuteranopia (green-blind)

#002C8B

Tritanopia (blue-blind)

#004055

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f1f8d;
/* rgb */ color: rgb(31, 31, 141);
/* oklch */ color: oklch(33.4% 0.173 271.9);

Tailwind

colors: {
  custom: {
    50: '#6f5cb0',
    500: '#1f1f8d',
    950: '#000000',
  },
}

SCSS

$custom: #1f1f8d;
$custom-light: #6f5cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1f8d",
  "rgb": {
    "r": 31,
    "g": 31,
    "b": 141
  },
  "hsl": {
    "h": 240,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.33393,
    "c": 0.17328,
    "h": 271.9
  },
  "luminance": 0.03194
}

Semantic roles & 50–950 ramp

primary

#1F1F8D

secondary

#BBBB4D

accent

#E741E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F1F8D

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

Preview Lab → · Contrast checker → · Palette generator →