#1F1771#1F1771

#1F1771 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.0% C 0.145 H 276.3°. Best body text is #FFFFFF at 14.80:1 contrast (WCAG AA passes).

Color values

HEX	#1F1771
RGB	rgb(31, 23, 113)
HSL	hsl(245, 66%, 27%)
HSV	hsv(245, 80%, 44%)
CMYK	cmyk(72.6%, 79.6%, 0%, 55.7%)
CIE-LAB	lab(15.98, 33.87, -50.00)
CIE-LCH	lch(15.98, 60.40, 304.12°)
OKLab	oklab(29.05% 0.016 -0.1445)
OKLCH	oklch(29.05% 0.145 276.3)
XYZ	xyz(3.8511, 2.0960, 15.8212)
Luminance	0.0210 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1771 #697117

analogous

#173C71 #1F1771 #4C1771

triadic

#1F1771 #711F17 #17711F

tetradic

#1F1771 #71173C #697117 #17714C

square

#1F1771 #71173C #697117 #17714C

split-complementary

#1F1771 #714C17 #3C7117

monochromatic

#070519 #110D3E #1F1771 #2D21A4 #3D2ED4

Accessibility & contrast

On white

14.80

#1F1771 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.42

#1F1771 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1771

14.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1771	#FFFFFF	#000000	##FFFFFF
##1F1771	1.00	14.80	1.42	14.80
#FFFFFF	14.80	1.00	21.00	1.00
#000000	1.42	21.00	1.00	21.00
##FFFFFF	14.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C74

Deuteranopia (green-blind)

#00246F

Tritanopia (blue-blind)

#003143

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1f1771;
/* rgb */ color: rgb(31, 23, 113);
/* oklch */ color: oklch(29.0% 0.145 276.3);

Tailwind

colors: {
  custom: {
    50: '#69569b',
    500: '#1f1771',
    950: '#000000',
  },
}

SCSS

$custom: #1f1771;
$custom-light: #69569b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1771",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 113
  },
  "hsl": {
    "h": 245.333,
    "s": 66.176,
    "l": 26.667
  },
  "oklch": {
    "l": 0.29048,
    "c": 0.14541,
    "h": 276.3
  },
  "luminance": 0.02096
}

Semantic roles & 50–950 ramp

primary

#1F1771

secondary

#9DA73D

accent

#E93FDA

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1F1771

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

Preview Lab → · Contrast checker → · Palette generator →