#1F1D8B#1F1D8B

#1F1D8B is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.9% C 0.173 H 272.4°. Best body text is #FFFFFF at 13.07:1 contrast (WCAG AA passes).

Color values

HEX	#1F1D8B
RGB	rgb(31, 29, 139)
HSL	hsl(241, 65%, 33%)
HSV	hsv(241, 79%, 55%)
CMYK	cmyk(77.7%, 79.1%, 0%, 45.5%)
CIE-LAB	lab(20.18, 39.35, -59.61)
CIE-LCH	lch(20.18, 71.43, 303.43°)
OKLab	oklab(32.88% 0.0071 -0.1725)
OKLCH	oklch(32.88% 0.173 272.4)
XYZ	xyz(5.6631, 3.0335, 24.7082)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1D8B #898B1D

analogous

#1D528B #1F1D8B #561D8B

triadic

#1F1D8B #8B1F1D #1D8B1F

tetradic

#1F1D8B #8B1D52 #898B1D #1D8B56

square

#1F1D8B #8B1D52 #898B1D #1D8B56

split-complementary

#1F1D8B #8B561D #528B1D

monochromatic

#080826 #141258 #1F1D8B #2A28BE #4C49D9

Accessibility & contrast

On white

13.07

#1F1D8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1F1D8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1D8B

13.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1D8B	#FFFFFF	#000000	##FFFFFF
##1F1D8B	1.00	13.07	1.61	13.07
#FFFFFF	13.07	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368E

Deuteranopia (green-blind)

#002B89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f1d8b;
/* rgb */ color: rgb(31, 29, 139);
/* oklch */ color: oklch(32.9% 0.173 272.4);

Tailwind

colors: {
  custom: {
    50: '#6f5bae',
    500: '#1f1d8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f1d8b;
$custom-light: #6f5bae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1d8b",
  "rgb": {
    "r": 31,
    "g": 29,
    "b": 139
  },
  "hsl": {
    "h": 241.091,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.32884,
    "c": 0.17269,
    "h": 272.4
  },
  "luminance": 0.03034
}

Semantic roles & 50–950 ramp

primary

#1F1D8B

secondary

#B9BB49

accent

#E83FE5

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #1F1D8B

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

Preview Lab → · Contrast checker → · Palette generator →