#1F1981#1F1981

#1F1981 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.2% C 0.164 H 273.9°. Best body text is #FFFFFF at 13.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F1981
RGB	rgb(31, 25, 129)
HSL	hsl(243, 68%, 30%)
HSV	hsv(243, 81%, 51%)
CMYK	cmyk(76%, 80.6%, 0%, 49.4%)
CIE-LAB	lab(18.24, 38.18, -56.53)
CIE-LCH	lch(18.24, 68.22, 304.04°)
OKLab	oklab(31.18% 0.011 -0.1635)
OKLCH	oklch(31.18% 0.164 273.9)
XYZ	xyz(4.8738, 2.5711, 21.0040)
Luminance	0.0257 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1981 #7B8119

analogous

#194781 #1F1981 #531981

triadic

#1F1981 #811F19 #19811F

tetradic

#1F1981 #811947 #7B8119 #198153

square

#1F1981 #811947 #7B8119 #198153

split-complementary

#1F1981 #815319 #478119

monochromatic

#06051A #130F4E #1F1981 #2B23B4 #443BD9

Accessibility & contrast

On white

13.87

#1F1981 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1F1981 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1981

13.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1981	#FFFFFF	#000000	##FFFFFF
##1F1981	1.00	13.87	1.51	13.87
#FFFFFF	13.87	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003184

Deuteranopia (green-blind)

#00287F

Tritanopia (blue-blind)

#00394D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f1981;
/* rgb */ color: rgb(31, 25, 129);
/* oklch */ color: oklch(31.2% 0.164 273.9);

Tailwind

colors: {
  custom: {
    50: '#6c58a7',
    500: '#1f1981',
    950: '#000000',
  },
}

SCSS

$custom: #1f1981;
$custom-light: #6c58a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1981",
  "rgb": {
    "r": 31,
    "g": 25,
    "b": 129
  },
  "hsl": {
    "h": 243.462,
    "s": 67.532,
    "l": 30.196
  },
  "oklch": {
    "l": 0.31179,
    "c": 0.16391,
    "h": 273.9
  },
  "luminance": 0.02572
}

Semantic roles & 50–950 ramp

primary

#1F1981

secondary

#AEB541

accent

#EA3DE0

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #1F1981

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

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