#1F2173#1F2173

#1F2173 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.9% C 0.137 H 273.9°. Best body text is #FFFFFF at 13.78:1 contrast (WCAG AA passes).

Color values

HEX	#1F2173
RGB	rgb(31, 33, 115)
HSL	hsl(239, 58%, 29%)
HSV	hsv(239, 73%, 45%)
CMYK	cmyk(73%, 71.3%, 0%, 54.9%)
CIE-LAB	lab(18.44, 28.37, -47.25)
CIE-LCH	lch(18.44, 55.11, 300.98°)
OKLab	oklab(30.86% 0.0093 -0.1366)
OKLCH	oklch(30.86% 0.137 273.9)
XYZ	xyz(4.2024, 2.6164, 16.4999)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2173 #73711F

analogous

#1F4B73 #1F2173 #471F73

triadic

#1F2173 #731F21 #21731F

tetradic

#1F2173 #731F4B #73711F #1F7347

square

#1F2173 #731F4B #73711F #1F7347

split-complementary

#1F2173 #73471F #4B731F

monochromatic

#060718 #121343 #1F2173 #2C2FA3 #4144CC

Accessibility & contrast

On white

13.78

#1F2173 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1F2173 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2173

13.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2173	#FFFFFF	#000000	##FFFFFF
##1F2173	1.00	13.78	1.52	13.78
#FFFFFF	13.78	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003176

Deuteranopia (green-blind)

#002971

Tritanopia (blue-blind)

#003747

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f2173;
/* rgb */ color: rgb(31, 33, 115);
/* oklch */ color: oklch(30.9% 0.137 273.9);

Tailwind

colors: {
  custom: {
    50: '#685d9c',
    500: '#1f2173',
    950: '#000000',
  },
}

SCSS

$custom: #1f2173;
$custom-light: #685d9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2173",
  "rgb": {
    "r": 31,
    "g": 33,
    "b": 115
  },
  "hsl": {
    "h": 238.571,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.30864,
    "c": 0.13687,
    "h": 273.9
  },
  "luminance": 0.02617
}

Semantic roles & 50–950 ramp

primary

#1F2173

secondary

#A7A547

accent

#DD47E1

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F2173

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

Preview Lab → · Contrast checker → · Palette generator →