#1F1D9F#1F1D9F

#1F1D9F is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.2% C 0.197 H 270.8°. Best body text is #FFFFFF at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#1F1D9F
RGB	rgb(31, 29, 159)
HSL	hsl(241, 69%, 37%)
HSV	hsv(241, 82%, 62%)
CMYK	cmyk(80.5%, 81.8%, 0%, 37.6%)
CIE-LAB	lab(22.56, 45.95, -68.03)
CIE-LCH	lch(22.56, 82.09, 304.04°)
OKLab	oklab(35.24% 0.0027 -0.1969)
OKLCH	oklch(35.24% 0.197 270.8)
XYZ	xyz(7.2603, 3.6724, 33.1204)
Luminance	0.0367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1D9F #9D9F1D

analogous

#1D5C9F #1F1D9F #601D9F

triadic

#1F1D9F #9F1F1D #1D9F1F

tetradic

#1F1D9F #9F1D5C #9D9F1D #1D9F60

square

#1F1D9F #9F1D5C #9D9F1D #1D9F60

split-complementary

#1F1D9F #9F601D #5C9F1D

monochromatic

#0B0A37 #15146B #1F1D9F #2926D3 #5856E0

Accessibility & contrast

On white

12.11

#1F1D9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1F1D9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1D9F

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1D9F	#FFFFFF	#000000	##FFFFFF
##1F1D9F	1.00	12.11	1.73	12.11
#FFFFFF	12.11	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003CA3

Deuteranopia (green-blind)

#002F9D

Tritanopia (blue-blind)

#00465F

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f1d9f;
/* rgb */ color: rgb(31, 29, 159);
/* oklch */ color: oklch(35.2% 0.197 270.8);

Tailwind

colors: {
  custom: {
    50: '#745cbd',
    500: '#1f1d9f',
    950: '#000000',
  },
}

SCSS

$custom: #1f1d9f;
$custom-light: #745cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1d9f",
  "rgb": {
    "r": 31,
    "g": 29,
    "b": 159
  },
  "hsl": {
    "h": 240.923,
    "s": 69.149,
    "l": 36.863
  },
  "oklch": {
    "l": 0.3524,
    "c": 0.19695,
    "h": 270.8
  },
  "luminance": 0.03673
}

Semantic roles & 50–950 ramp

primary

#1F1D9F

secondary

#C2C454

accent

#EC3CE9

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F1D9F

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

Preview Lab → · Contrast checker → · Palette generator →