#1F1773#1F1773

#1F1773 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.3% C 0.148 H 276.0°. Best body text is #FFFFFF at 14.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F1773
RGB	rgb(31, 23, 115)
HSL	hsl(245, 67%, 27%)
HSV	hsv(245, 80%, 45%)
CMYK	cmyk(73%, 80%, 0%, 54.9%)
CIE-LAB	lab(16.21, 34.56, -50.92)
CIE-LCH	lch(16.21, 61.54, 304.17°)
OKLab	oklab(29.28% 0.0155 -0.1472)
OKLCH	oklch(29.28% 0.148 276)
XYZ	xyz(3.9650, 2.1415, 16.4207)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1773 #6B7317

analogous

#173D73 #1F1773 #4D1773

triadic

#1F1773 #731F17 #17731F

tetradic

#1F1773 #73173D #6B7317 #17734D

square

#1F1773 #73173D #6B7317 #17734D

split-complementary

#1F1773 #734D17 #3D7317

monochromatic

#07051A #110D40 #1F1773 #2D21A6 #3D2FD5

Accessibility & contrast

On white

14.70

#1F1773 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1F1773 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1773

14.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1773	#FFFFFF	#000000	##FFFFFF
##1F1773	1.00	14.70	1.43	14.70
#FFFFFF	14.70	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C76

Deuteranopia (green-blind)

#002471

Tritanopia (blue-blind)

#003244

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1f1773;
/* rgb */ color: rgb(31, 23, 115);
/* oklch */ color: oklch(29.3% 0.148 276.0);

Tailwind

colors: {
  custom: {
    50: '#69569c',
    500: '#1f1773',
    950: '#000000',
  },
}

SCSS

$custom: #1f1773;
$custom-light: #69569c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1773",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 115
  },
  "hsl": {
    "h": 245.217,
    "s": 66.667,
    "l": 27.059
  },
  "oklch": {
    "l": 0.29278,
    "c": 0.148,
    "h": 276
  },
  "luminance": 0.02142
}

Semantic roles & 50–950 ramp

primary

#1F1773

secondary

#9FA93D

accent

#EA3EDB

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1F1773

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

Preview Lab → · Contrast checker → · Palette generator →