#1F2F8A#1F2F8A

#1F2F8A is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.7% C 0.151 H 269.2°. Best body text is #FFFFFF at 11.46:1 contrast (WCAG AA passes).

Color values

HEX	#1F2F8A
RGB	rgb(31, 47, 138)
HSL	hsl(231, 63%, 33%)
HSV	hsv(231, 78%, 54%)
CMYK	cmyk(77.5%, 65.9%, 0%, 45.9%)
CIE-LAB	lab(24.19, 27.69, -52.38)
CIE-LCH	lch(24.19, 59.25, 297.86°)
OKLab	oklab(35.74% -0.0021 -0.1515)
OKLCH	oklch(35.74% 0.152 269.2)
XYZ	xyz(6.1675, 4.1586, 24.5175)
Luminance	0.0416 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2F8A #8A7A1F

analogous

#1F648A #1F2F8A #441F8A

triadic

#1F2F8A #8A1F2F #2F8A1F

tetradic

#1F2F8A #8A1F64 #8A7A1F #1F8A44

square

#1F2F8A #8A1F64 #8A7A1F #1F8A44

split-complementary

#1F2F8A #8A441F #648A1F

monochromatic

#090D26 #141E58 #1F2F8A #2A40BC #4C61D7

Accessibility & contrast

On white

11.46

#1F2F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1F2F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2F8A

11.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2F8A	#FFFFFF	#000000	##FFFFFF
##1F2F8A	1.00	11.46	1.83	11.46
#FFFFFF	11.46	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8D

Deuteranopia (green-blind)

#003588

Tritanopia (blue-blind)

#004758

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f2f8a;
/* rgb */ color: rgb(31, 47, 138);
/* oklch */ color: oklch(35.7% 0.151 269.2);

Tailwind

colors: {
  custom: {
    50: '#6d67ad',
    500: '#1f2f8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f2f8a;
$custom-light: #6d67ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2f8a",
  "rgb": {
    "r": 31,
    "g": 47,
    "b": 138
  },
  "hsl": {
    "h": 231.028,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.35739,
    "c": 0.1515,
    "h": 269.2
  },
  "luminance": 0.04159
}

Semantic roles & 50–950 ramp

primary

#1F2F8A

secondary

#BAA94B

accent

#CE41E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F2F8A

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

Preview Lab → · Contrast checker → · Palette generator →