#1F348A#1F348A

#1F348A is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.7% C 0.145 H 267.8°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F348A
RGB	rgb(31, 52, 138)
HSL	hsl(228, 63%, 33%)
HSV	hsv(228, 78%, 54%)
CMYK	cmyk(77.5%, 62.3%, 0%, 45.9%)
CIE-LAB	lab(25.51, 24.28, -50.23)
CIE-LCH	lch(25.51, 55.79, 295.80°)
OKLab	oklab(36.71% -0.0055 -0.1451)
OKLCH	oklch(36.71% 0.145 267.8)
XYZ	xyz(6.3789, 4.5816, 24.5880)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F348A #8A751F

analogous

#1F698A #1F348A #3F1F8A

triadic

#1F348A #8A1F34 #348A1F

tetradic

#1F348A #8A1F69 #8A751F #1F8A3F

square

#1F348A #8A1F69 #8A751F #1F8A3F

split-complementary

#1F348A #8A3F1F #698A1F

monochromatic

#090E26 #142158 #1F348A #2A47BC #4C68D7

Accessibility & contrast

On white

10.96

#1F348A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1F348A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F348A

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F348A	#FFFFFF	#000000	##FFFFFF
##1F348A	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428D

Deuteranopia (green-blind)

#003888

Tritanopia (blue-blind)

#004A59

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f348a;
/* rgb */ color: rgb(31, 52, 138);
/* oklch */ color: oklch(36.7% 0.145 267.8);

Tailwind

colors: {
  custom: {
    50: '#6c6bad',
    500: '#1f348a',
    950: '#000000',
  },
}

SCSS

$custom: #1f348a;
$custom-light: #6c6bad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f348a",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 138
  },
  "hsl": {
    "h": 228.224,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.36713,
    "c": 0.14522,
    "h": 267.8
  },
  "luminance": 0.04582
}

Semantic roles & 50–950 ramp

primary

#1F348A

secondary

#BAA44B

accent

#C641E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F348A

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

Preview Lab → · Contrast checker → · Palette generator →