#1F448D#1F448D

#1F448D is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.4% C 0.129 H 262.1°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F448D
RGB	rgb(31, 68, 141)
HSL	hsl(220, 64%, 34%)
HSV	hsv(220, 78%, 55%)
CMYK	cmyk(78%, 51.8%, 0%, 44.7%)
CIE-LAB	lab(30.27, 14.41, -44.34)
CIE-LCH	lch(30.27, 46.63, 288.01°)
OKLab	oklab(40.38% -0.0177 -0.1275)
OKLCH	oklch(40.38% 0.129 262.1)
XYZ	xyz(7.4382, 6.3478, 26.0274)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F448D #8D681F

analogous

#1F7B8D #1F448D #311F8D

triadic

#1F448D #8D1F44 #448D1F

tetradic

#1F448D #8D1F7B #8D681F #1F8D31

square

#1F448D #8D1F7B #8D681F #1F8D31

split-complementary

#1F448D #8D311F #7B8D1F

monochromatic

#091429 #142C5B #1F448D #2A5CBF #4E7DD8

Accessibility & contrast

On white

9.25

#1F448D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F448D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F448D

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F448D	#FFFFFF	#000000	##FFFFFF
##1F448D	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174D90

Deuteranopia (green-blind)

#00438C

Tritanopia (blue-blind)

#005662

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f448d;
/* rgb */ color: rgb(31, 68, 141);
/* oklch */ color: oklch(40.4% 0.129 262.1);

Tailwind

colors: {
  custom: {
    50: '#6c77af',
    500: '#1f448d',
    950: '#000000',
  },
}

SCSS

$custom: #1f448d;
$custom-light: #6c77af;
$custom-dark: #000000;

JSON

{
  "hex": "#1f448d",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 141
  },
  "hsl": {
    "h": 219.818,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.4038,
    "c": 0.12877,
    "h": 262.1
  },
  "luminance": 0.06349
}

Semantic roles & 50–950 ramp

primary

#1F448D

secondary

#BB964D

accent

#AF41E7

background

#F7F7FA

surface

#EDEDF4

border

#C8C8CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #1F448D

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

Preview Lab → · Contrast checker → · Palette generator →