#1F2181#1F2181

#1F2181 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.4% C 0.156 H 272.6°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#1F2181
RGB	rgb(31, 33, 129)
HSL	hsl(239, 61%, 31%)
HSV	hsv(239, 76%, 51%)
CMYK	cmyk(76%, 74.4%, 0%, 49.4%)
CIE-LAB	lab(19.90, 33.49, -53.79)
CIE-LCH	lch(19.90, 63.36, 301.91°)
OKLab	oklab(32.35% 0.0072 -0.1556)
OKLCH	oklch(32.35% 0.156 272.6)
XYZ	xyz(5.0700, 2.9635, 21.0694)
Luminance	0.0296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2181 #817F1F

analogous

#1F5281 #1F2181 #4E1F81

triadic

#1F2181 #811F21 #21811F

tetradic

#1F2181 #811F52 #817F1F #1F814E

square

#1F2181 #811F52 #817F1F #1F814E

split-complementary

#1F2181 #814E1F #52811F

monochromatic

#07081E #131450 #1F2181 #2B2EB2 #474AD3

Accessibility & contrast

On white

13.18

#1F2181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1F2181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2181

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2181	#FFFFFF	#000000	##FFFFFF
##1F2181	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003584

Deuteranopia (green-blind)

#002B7F

Tritanopia (blue-blind)

#003C4F

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f2181;
/* rgb */ color: rgb(31, 33, 129);
/* oklch */ color: oklch(32.4% 0.156 272.6);

Tailwind

colors: {
  custom: {
    50: '#6c5da7',
    500: '#1f2181',
    950: '#000000',
  },
}

SCSS

$custom: #1f2181;
$custom-light: #6c5da7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2181",
  "rgb": {
    "r": 31,
    "g": 33,
    "b": 129
  },
  "hsl": {
    "h": 238.776,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.32354,
    "c": 0.15579,
    "h": 272.6
  },
  "luminance": 0.02964
}

Semantic roles & 50–950 ramp

primary

#1F2181

secondary

#B4B248

accent

#E143E4

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F2181

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

Preview Lab → · Contrast checker → · Palette generator →