#1F248B#1F248B

#1F248B is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.9% C 0.166 H 271.4°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F248B
RGB	rgb(31, 36, 139)
HSL	hsl(237, 64%, 33%)
HSV	hsv(237, 78%, 55%)
CMYK	cmyk(77.7%, 74.1%, 0%, 45.5%)
CIE-LAB	lab(21.64, 35.22, -57.20)
CIE-LCH	lch(21.64, 67.17, 301.62°)
OKLab	oklab(33.92% 0.004 -0.1656)
OKLCH	oklch(33.92% 0.166 271.4)
XYZ	xyz(5.8546, 3.4165, 24.7720)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F248B #8B861F

analogous

#1F5A8B #1F248B #501F8B

triadic

#1F248B #8B1F24 #248B1F

tetradic

#1F248B #8B1F5A #8B861F #1F8B50

square

#1F248B #8B1F5A #8B861F #1F8B50

split-complementary

#1F248B #8B501F #5A8B1F

monochromatic

#090A27 #141759 #1F248B #2A31BD #4D53D7

Accessibility & contrast

On white

12.47

#1F248B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F248B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F248B

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F248B	#FFFFFF	#000000	##FFFFFF
##1F248B	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00398E

Deuteranopia (green-blind)

#002F89

Tritanopia (blue-blind)

#004155

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f248b;
/* rgb */ color: rgb(31, 36, 139);
/* oklch */ color: oklch(33.9% 0.166 271.4);

Tailwind

colors: {
  custom: {
    50: '#6e60ae',
    500: '#1f248b',
    950: '#000000',
  },
}

SCSS

$custom: #1f248b;
$custom-light: #6e60ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f248b",
  "rgb": {
    "r": 31,
    "g": 36,
    "b": 139
  },
  "hsl": {
    "h": 237.222,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.33921,
    "c": 0.16563,
    "h": 271.4
  },
  "luminance": 0.03417
}

Semantic roles & 50–950 ramp

primary

#1F248B

secondary

#BAB54C

accent

#DF41E7

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F248B

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

Preview Lab → · Contrast checker → · Palette generator →