#1F2179#1F2179

#1F2179 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.5% C 0.145 H 273.3°. Best body text is #FFFFFF at 13.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F2179
RGB	rgb(31, 33, 121)
HSL	hsl(239, 59%, 30%)
HSV	hsv(239, 74%, 47%)
CMYK	cmyk(74.4%, 72.7%, 0%, 52.5%)
CIE-LAB	lab(19.05, 30.58, -50.09)
CIE-LCH	lch(19.05, 58.69, 301.41°)
OKLab	oklab(31.49% 0.0084 -0.1449)
OKLCH	oklch(31.49% 0.145 273.3)
XYZ	xyz(4.5590, 2.7590, 18.3777)
Luminance	0.0276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2179 #79771F

analogous

#1F4E79 #1F2179 #4A1F79

triadic

#1F2179 #791F21 #21791F

tetradic

#1F2179 #791F4E #79771F #1F794A

square

#1F2179 #791F4E #79771F #1F794A

split-complementary

#1F2179 #794A1F #4E791F

monochromatic

#060718 #131448 #1F2179 #2B2EAA #4347CF

Accessibility & contrast

On white

13.53

#1F2179 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1F2179 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2179

13.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2179	#FFFFFF	#000000	##FFFFFF
##1F2179	1.00	13.53	1.55	13.53
#FFFFFF	13.53	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337C

Deuteranopia (green-blind)

#002A77

Tritanopia (blue-blind)

#00394A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f2179;
/* rgb */ color: rgb(31, 33, 121);
/* oklch */ color: oklch(31.5% 0.145 273.3);

Tailwind

colors: {
  custom: {
    50: '#6a5da1',
    500: '#1f2179',
    950: '#000000',
  },
}

SCSS

$custom: #1f2179;
$custom-light: #6a5da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2179",
  "rgb": {
    "r": 31,
    "g": 33,
    "b": 121
  },
  "hsl": {
    "h": 238.667,
    "s": 59.211,
    "l": 29.804
  },
  "oklch": {
    "l": 0.31493,
    "c": 0.1451,
    "h": 273.3
  },
  "luminance": 0.02759
}

Semantic roles & 50–950 ramp

primary

#1F2179

secondary

#ACAA47

accent

#DF45E2

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1F2179

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

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