#1F258A#1F258A

#1F258A is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.0% C 0.163 H 271.3°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1F258A
RGB	rgb(31, 37, 138)
HSL	hsl(237, 63%, 33%)
HSV	hsv(237, 78%, 54%)
CMYK	cmyk(77.5%, 73.2%, 0%, 45.9%)
CIE-LAB	lab(21.76, 34.24, -56.38)
CIE-LCH	lch(21.76, 65.96, 301.27°)
OKLab	oklab(33.97% 0.0037 -0.1632)
OKLCH	oklch(33.97% 0.163 271.3)
XYZ	xyz(5.8125, 3.4488, 24.3992)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F258A #8A841F

analogous

#1F5A8A #1F258A #4F1F8A

triadic

#1F258A #8A1F25 #258A1F

tetradic

#1F258A #8A1F5A #8A841F #1F8A4F

square

#1F258A #8A1F5A #8A841F #1F8A4F

split-complementary

#1F258A #8A4F1F #5A8A1F

monochromatic

#090A26 #141858 #1F258A #2A32BC #4C54D7

Accessibility & contrast

On white

12.43

#1F258A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1F258A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F258A

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F258A	#FFFFFF	#000000	##FFFFFF
##1F258A	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00398D

Deuteranopia (green-blind)

#002F88

Tritanopia (blue-blind)

#004155

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f258a;
/* rgb */ color: rgb(31, 37, 138);
/* oklch */ color: oklch(34.0% 0.163 271.3);

Tailwind

colors: {
  custom: {
    50: '#6e60ad',
    500: '#1f258a',
    950: '#000000',
  },
}

SCSS

$custom: #1f258a;
$custom-light: #6e60ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f258a",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 138
  },
  "hsl": {
    "h": 236.636,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.33974,
    "c": 0.16323,
    "h": 271.3
  },
  "luminance": 0.03449
}

Semantic roles & 50–950 ramp

primary

#1F258A

secondary

#BAB34B

accent

#DD41E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F258A

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

Preview Lab → · Contrast checker → · Palette generator →