#1F1B83#1F1B83

#1F1B83 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.7% C 0.165 H 273.4°. Best body text is #FFFFFF at 13.61:1 contrast (WCAG AA passes).

Color values

HEX	#1F1B83
RGB	rgb(31, 27, 131)
HSL	hsl(242, 66%, 31%)
HSV	hsv(242, 79%, 51%)
CMYK	cmyk(76.3%, 79.4%, 0%, 48.6%)
CIE-LAB	lab(18.86, 37.75, -56.77)
CIE-LCH	lch(18.86, 68.18, 303.62°)
OKLab	oklab(31.68% 0.0097 -0.1643)
OKLCH	oklch(31.68% 0.165 273.4)
XYZ	xyz(5.0524, 2.7133, 21.7258)
Luminance	0.0271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1B83 #7F831B

analogous

#1B4B83 #1F1B83 #531B83

triadic

#1F1B83 #831F1B #1B831F

tetradic

#1F1B83 #831B4B #7F831B #1B8353

square

#1F1B83 #831B4B #7F831B #1B8353

split-complementary

#1F1B83 #83531B #4B831B

monochromatic

#07061E #131150 #1F1B83 #2B25B6 #4641D8

Accessibility & contrast

On white

13.61

#1F1B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F1B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1B83

13.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1B83	#FFFFFF	#000000	##FFFFFF
##1F1B83	1.00	13.61	1.54	13.61
#FFFFFF	13.61	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003386

Deuteranopia (green-blind)

#002981

Tritanopia (blue-blind)

#003A4E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f1b83;
/* rgb */ color: rgb(31, 27, 131);
/* oklch */ color: oklch(31.7% 0.165 273.4);

Tailwind

colors: {
  custom: {
    50: '#6d59a8',
    500: '#1f1b83',
    950: '#000000',
  },
}

SCSS

$custom: #1f1b83;
$custom-light: #6d59a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1b83",
  "rgb": {
    "r": 31,
    "g": 27,
    "b": 131
  },
  "hsl": {
    "h": 242.308,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.31683,
    "c": 0.16455,
    "h": 273.4
  },
  "luminance": 0.02714
}

Semantic roles & 50–950 ramp

primary

#1F1B83

secondary

#B2B643

accent

#E93FE2

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F1B83

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

Preview Lab → · Contrast checker → · Palette generator →