#1F448F#1F448F

#1F448F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.5% C 0.132 H 262.4°. Best body text is #FFFFFF at 9.20:1 contrast (WCAG AA passes).

Color values

HEX	#1F448F
RGB	rgb(31, 68, 143)
HSL	hsl(220, 64%, 34%)
HSV	hsv(220, 78%, 56%)
CMYK	cmyk(78.3%, 52.4%, 0%, 43.9%)
CIE-LAB	lab(30.42, 15.22, -45.34)
CIE-LCH	lch(30.42, 47.82, 288.55°)
OKLab	oklab(40.54% -0.0174 -0.1305)
OKLCH	oklch(40.54% 0.132 262.4)
XYZ	xyz(7.5883, 6.4079, 26.8182)
Luminance	0.0641 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F448F #8F6A1F

analogous

#1F7C8F #1F448F #321F8F

triadic

#1F448F #8F1F44 #448F1F

tetradic

#1F448F #8F1F7C #8F6A1F #1F8F32

square

#1F448F #8F1F7C #8F6A1F #1F8F32

split-complementary

#1F448F #8F321F #7C8F1F

monochromatic

#09142A #142C5D #1F448F #2A5CC1 #4F7DD9

Accessibility & contrast

On white

9.20

#1F448F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1F448F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F448F

9.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F448F	#FFFFFF	#000000	##FFFFFF
##1F448F	1.00	9.20	2.28	9.20
#FFFFFF	9.20	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134D92

Deuteranopia (green-blind)

#00438E

Tritanopia (blue-blind)

#005663

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f448f;
/* rgb */ color: rgb(31, 68, 143);
/* oklch */ color: oklch(40.5% 0.132 262.4);

Tailwind

colors: {
  custom: {
    50: '#6c77b0',
    500: '#1f448f',
    950: '#000000',
  },
}

SCSS

$custom: #1f448f;
$custom-light: #6c77b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f448f",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 143
  },
  "hsl": {
    "h": 220.179,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.40537,
    "c": 0.13163,
    "h": 262.4
  },
  "luminance": 0.06409
}

Semantic roles & 50–950 ramp

primary

#1F448F

secondary

#BC984E

accent

#B040E7

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F448F

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

Preview Lab → · Contrast checker → · Palette generator →