#1F348B#1F348B

#1F348B is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.8% C 0.147 H 267.9°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#1F348B
RGB	rgb(31, 52, 139)
HSL	hsl(228, 64%, 33%)
HSV	hsv(228, 78%, 55%)
CMYK	cmyk(77.7%, 62.6%, 0%, 45.5%)
CIE-LAB	lab(25.60, 24.67, -50.70)
CIE-LCH	lch(25.60, 56.39, 295.94°)
OKLab	oklab(36.81% -0.0055 -0.1465)
OKLCH	oklch(36.81% 0.147 267.9)
XYZ	xyz(6.4516, 4.6107, 24.9710)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F348B #8B761F

analogous

#1F6A8B #1F348B #401F8B

triadic

#1F348B #8B1F34 #348B1F

tetradic

#1F348B #8B1F6A #8B761F #1F8B40

square

#1F348B #8B1F6A #8B761F #1F8B40

split-complementary

#1F348B #8B401F #6A8B1F

monochromatic

#090F27 #142159 #1F348B #2A47BD #4D68D7

Accessibility & contrast

On white

10.92

#1F348B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1F348B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F348B

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F348B	#FFFFFF	#000000	##FFFFFF
##1F348B	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428E

Deuteranopia (green-blind)

#003889

Tritanopia (blue-blind)

#004A5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f348b;
/* rgb */ color: rgb(31, 52, 139);
/* oklch */ color: oklch(36.8% 0.147 267.9);

Tailwind

colors: {
  custom: {
    50: '#6c6bae',
    500: '#1f348b',
    950: '#000000',
  },
}

SCSS

$custom: #1f348b;
$custom-light: #6c6bae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f348b",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 139
  },
  "hsl": {
    "h": 228.333,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.36806,
    "c": 0.14662,
    "h": 267.9
  },
  "luminance": 0.04611
}

Semantic roles & 50–950 ramp

primary

#1F348B

secondary

#BAA54C

accent

#C641E7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F348B

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

Preview Lab → · Contrast checker → · Palette generator →