#1F1FA1#1F1FA1

#1F1FA1 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.7% C 0.198 H 270.5°. Best body text is #FFFFFF at 11.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F1FA1
RGB	rgb(31, 31, 161)
HSL	hsl(240, 68%, 38%)
HSV	hsv(240, 81%, 63%)
CMYK	cmyk(80.7%, 80.7%, 0%, 36.9%)
CIE-LAB	lab(23.15, 45.59, -68.27)
CIE-LCH	lch(23.15, 82.09, 303.73°)
OKLab	oklab(35.72% 0.0018 -0.1977)
OKLCH	oklch(35.72% 0.198 270.5)
XYZ	xyz(7.4859, 3.8436, 34.0587)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1FA1 #A1A11F

analogous

#1F60A1 #1F1FA1 #601FA1

triadic

#1F1FA1 #A11F1F #1FA11F

tetradic

#1F1FA1 #A11F60 #A1A11F #1FA160

square

#1F1FA1 #A11F60 #A1A11F #1FA160

split-complementary

#1F1FA1 #A1601F #60A11F

monochromatic

#0B0B3A #15156E #1F1FA1 #2929D4 #5B5BDF

Accessibility & contrast

On white

11.87

#1F1FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1F1FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1FA1

11.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1FA1	#FFFFFF	#000000	##FFFFFF
##1F1FA1	1.00	11.87	1.77	11.87
#FFFFFF	11.87	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA5

Deuteranopia (green-blind)

#00309F

Tritanopia (blue-blind)

#004860

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f1fa1;
/* rgb */ color: rgb(31, 31, 161);
/* oklch */ color: oklch(35.7% 0.198 270.5);

Tailwind

colors: {
  custom: {
    50: '#745ebe',
    500: '#1f1fa1',
    950: '#000000',
  },
}

SCSS

$custom: #1f1fa1;
$custom-light: #745ebe;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1fa1",
  "rgb": {
    "r": 31,
    "g": 31,
    "b": 161
  },
  "hsl": {
    "h": 240,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.35721,
    "c": 0.19768,
    "h": 270.5
  },
  "luminance": 0.03844
}

Semantic roles & 50–950 ramp

primary

#1F1FA1

secondary

#C4C458

accent

#EB3DEB

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F1FA1

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

Preview Lab → · Contrast checker → · Palette generator →