#1F448A#1F448A

#1F448A is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.1% C 0.124 H 261.6°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#1F448A
RGB	rgb(31, 68, 138)
HSL	hsl(219, 63%, 33%)
HSV	hsv(219, 78%, 54%)
CMYK	cmyk(77.5%, 50.7%, 0%, 45.9%)
CIE-LAB	lab(30.06, 13.21, -42.84)
CIE-LCH	lch(30.06, 44.83, 287.14°)
OKLab	oklab(40.15% -0.0181 -0.1231)
OKLCH	oklch(40.15% 0.124 261.6)
XYZ	xyz(7.2180, 6.2597, 24.8677)
Luminance	0.0626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F448A #8A651F

analogous

#1F798A #1F448A #2F1F8A

triadic

#1F448A #8A1F44 #448A1F

tetradic

#1F448A #8A1F79 #8A651F #1F8A2F

square

#1F448A #8A1F79 #8A651F #1F8A2F

split-complementary

#1F448A #8A2F1F #798A1F

monochromatic

#091326 #142B58 #1F448A #2A5DBC #4C7CD7

Accessibility & contrast

On white

9.32

#1F448A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1F448A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F448A

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F448A	#FFFFFF	#000000	##FFFFFF
##1F448A	1.00	9.32	2.25	9.32
#FFFFFF	9.32	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4C8D

Deuteranopia (green-blind)

#004289

Tritanopia (blue-blind)

#005560

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f448a;
/* rgb */ color: rgb(31, 68, 138);
/* oklch */ color: oklch(40.1% 0.124 261.6);

Tailwind

colors: {
  custom: {
    50: '#6b77ad',
    500: '#1f448a',
    950: '#000000',
  },
}

SCSS

$custom: #1f448a;
$custom-light: #6b77ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f448a",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 138
  },
  "hsl": {
    "h": 219.252,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.40147,
    "c": 0.12445,
    "h": 261.6
  },
  "luminance": 0.06261
}

Semantic roles & 50–950 ramp

primary

#1F448A

secondary

#BA934B

accent

#AD41E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F448A

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

Preview Lab → · Contrast checker → · Palette generator →