#1F1FB1#1F1FB1

#1F1FB1 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.6% C 0.216 H 269.6°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#1F1FB1
RGB	rgb(31, 31, 177)
HSL	hsl(240, 70%, 41%)
HSV	hsv(240, 82%, 69%)
CMYK	cmyk(82.5%, 82.5%, 0%, 30.6%)
CIE-LAB	lab(25.09, 50.69, -74.71)
CIE-LCH	lch(25.09, 90.28, 304.15°)
OKLab	oklab(37.63% -0.0015 -0.2163)
OKLCH	oklch(37.63% 0.216 269.6)
XYZ	xyz(8.9882, 4.4445, 41.9706)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1FB1 #B1B11F

analogous

#1F68B1 #1F1FB1 #681FB1

triadic

#1F1FB1 #B11F1F #1FB11F

tetradic

#1F1FB1 #B11F68 #B1B11F #1FB168

square

#1F1FB1 #B11F68 #B1B11F #1FB168

split-complementary

#1F1FB1 #B1681F #68B11F

monochromatic

#0D0D49 #16167D #1F1FB1 #3232DB #6666E4

Accessibility & contrast

On white

11.12

#1F1FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1F1FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1FB1

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1FB1	#FFFFFF	#000000	##FFFFFF
##1F1FB1	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B5

Deuteranopia (green-blind)

#0034AF

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f1fb1;
/* rgb */ color: rgb(31, 31, 177);
/* oklch */ color: oklch(37.6% 0.216 269.6);

Tailwind

colors: {
  custom: {
    50: '#785fca',
    500: '#1f1fb1',
    950: '#000000',
  },
}

SCSS

$custom: #1f1fb1;
$custom-light: #785fca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1fb1",
  "rgb": {
    "r": 31,
    "g": 31,
    "b": 177
  },
  "hsl": {
    "h": 240,
    "s": 70.192,
    "l": 40.784
  },
  "oklch": {
    "l": 0.37631,
    "c": 0.21632,
    "h": 269.6
  },
  "luminance": 0.04446
}

Semantic roles & 50–950 ramp

primary

#1F1FB1

secondary

#CACA62

accent

#ED3BED

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0513

muted

#7C7982

Preview Lab

Preview with #1F1FB1

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

Preview Lab → · Contrast checker → · Palette generator →