#1F1F87#1F1F87

#1F1F87 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.7% C 0.166 H 272.4°. Best body text is #FFFFFF at 13.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F1F87
RGB	rgb(31, 31, 135)
HSL	hsl(240, 63%, 33%)
HSV	hsv(240, 77%, 53%)
CMYK	cmyk(77%, 77%, 0%, 47.1%)
CIE-LAB	lab(20.12, 36.83, -57.20)
CIE-LCH	lch(20.12, 68.03, 302.78°)
OKLab	oklab(32.71% 0.0071 -0.1655)
OKLCH	oklch(32.71% 0.166 272.4)
XYZ	xyz(5.4268, 3.0200, 23.2139)
Luminance	0.0302 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1F87 #87871F

analogous

#1F5387 #1F1F87 #531F87

triadic

#1F1F87 #871F1F #1F871F

tetradic

#1F1F87 #871F53 #87871F #1F8753

square

#1F1F87 #871F53 #87871F #1F8753

split-complementary

#1F1F87 #87531F #53871F

monochromatic

#080823 #141455 #1F1F87 #2A2AB9 #4B4BD6

Accessibility & contrast

On white

13.09

#1F1F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1F1F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1F87

13.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1F87	#FFFFFF	#000000	##FFFFFF
##1F1F87	1.00	13.09	1.60	13.09
#FFFFFF	13.09	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368A

Deuteranopia (green-blind)

#002B85

Tritanopia (blue-blind)

#003E51

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f1f87;
/* rgb */ color: rgb(31, 31, 135);
/* oklch */ color: oklch(32.7% 0.166 272.4);

Tailwind

colors: {
  custom: {
    50: '#6d5cab',
    500: '#1f1f87',
    950: '#000000',
  },
}

SCSS

$custom: #1f1f87;
$custom-light: #6d5cab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1f87",
  "rgb": {
    "r": 31,
    "g": 31,
    "b": 135
  },
  "hsl": {
    "h": 240,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32711,
    "c": 0.16569,
    "h": 272.4
  },
  "luminance": 0.03021
}

Semantic roles & 50–950 ramp

primary

#1F1F87

secondary

#B8B84A

accent

#E642E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F1F87

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

Preview Lab → · Contrast checker → · Palette generator →