#1F1871#1F1871

#1F1871 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.2% C 0.144 H 276.1°. Best body text is #FFFFFF at 14.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F1871
RGB	rgb(31, 24, 113)
HSL	hsl(245, 65%, 27%)
HSV	hsv(245, 79%, 44%)
CMYK	cmyk(72.6%, 78.8%, 0%, 55.7%)
CIE-LAB	lab(16.19, 33.29, -49.66)
CIE-LCH	lch(16.19, 59.79, 303.84°)
OKLab	oklab(29.19% 0.0154 -0.1436)
OKLCH	oklch(29.19% 0.144 276.1)
XYZ	xyz(3.8714, 2.1365, 15.8279)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1871 #6A7118

analogous

#183E71 #1F1871 #4C1871

triadic

#1F1871 #711F18 #18711F

tetradic

#1F1871 #71183E #6A7118 #18714C

square

#1F1871 #71183E #6A7118 #18714C

split-complementary

#1F1871 #714C18 #3E7118

monochromatic

#070519 #110D3F #1F1871 #2D23A3 #3D30D3

Accessibility & contrast

On white

14.71

#1F1871 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1F1871 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1871

14.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1871	#FFFFFF	#000000	##FFFFFF
##1F1871	1.00	14.71	1.43	14.71
#FFFFFF	14.71	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C74

Deuteranopia (green-blind)

#00246F

Tritanopia (blue-blind)

#003243

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1f1871;
/* rgb */ color: rgb(31, 24, 113);
/* oklch */ color: oklch(29.2% 0.144 276.1);

Tailwind

colors: {
  custom: {
    50: '#69579b',
    500: '#1f1871',
    950: '#000000',
  },
}

SCSS

$custom: #1f1871;
$custom-light: #69579b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1871",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 113
  },
  "hsl": {
    "h": 244.719,
    "s": 64.964,
    "l": 26.863
  },
  "oklch": {
    "l": 0.29192,
    "c": 0.14438,
    "h": 276.1
  },
  "luminance": 0.02137
}

Semantic roles & 50–950 ramp

primary

#1F1871

secondary

#9EA63E

accent

#E840DB

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1F1871

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

Preview Lab → · Contrast checker → · Palette generator →