#1F308A#1F308A

#1F308A is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.9% C 0.150 H 268.9°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#1F308A
RGB	rgb(31, 48, 138)
HSL	hsl(230, 63%, 33%)
HSV	hsv(230, 78%, 54%)
CMYK	cmyk(77.5%, 65.2%, 0%, 45.9%)
CIE-LAB	lab(24.45, 27.02, -51.96)
CIE-LCH	lch(24.45, 58.56, 297.47°)
OKLab	oklab(35.93% -0.0028 -0.1502)
OKLCH	oklch(35.93% 0.15 268.9)
XYZ	xyz(6.2079, 4.2395, 24.5310)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F308A #8A791F

analogous

#1F658A #1F308A #431F8A

triadic

#1F308A #8A1F30 #308A1F

tetradic

#1F308A #8A1F65 #8A791F #1F8A43

square

#1F308A #8A1F65 #8A791F #1F8A43

split-complementary

#1F308A #8A431F #658A1F

monochromatic

#090D26 #141F58 #1F308A #2A41BC #4C62D7

Accessibility & contrast

On white

11.36

#1F308A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1F308A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F308A

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F308A	#FFFFFF	#000000	##FFFFFF
##1F308A	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8D

Deuteranopia (green-blind)

#003588

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f308a;
/* rgb */ color: rgb(31, 48, 138);
/* oklch */ color: oklch(35.9% 0.150 268.9);

Tailwind

colors: {
  custom: {
    50: '#6d68ad',
    500: '#1f308a',
    950: '#000000',
  },
}

SCSS

$custom: #1f308a;
$custom-light: #6d68ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f308a",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 138
  },
  "hsl": {
    "h": 230.467,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.3593,
    "c": 0.15027,
    "h": 268.9
  },
  "luminance": 0.0424
}

Semantic roles & 50–950 ramp

primary

#1F308A

secondary

#BAA84B

accent

#CC41E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F308A

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

Preview Lab → · Contrast checker → · Palette generator →