#1F448C#1F448C

#1F448C is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.3% C 0.127 H 262.0°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#1F448C
RGB	rgb(31, 68, 140)
HSL	hsl(220, 64%, 34%)
HSV	hsv(220, 78%, 55%)
CMYK	cmyk(77.9%, 51.4%, 0%, 45.1%)
CIE-LAB	lab(30.20, 14.01, -43.84)
CIE-LCH	lch(30.20, 46.03, 287.72°)
OKLab	oklab(40.3% -0.0178 -0.1261)
OKLCH	oklch(40.3% 0.127 262)
XYZ	xyz(7.3641, 6.3182, 25.6373)
Luminance	0.0632 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F448C #8C671F

analogous

#1F7A8C #1F448C #301F8C

triadic

#1F448C #8C1F44 #448C1F

tetradic

#1F448C #8C1F7A #8C671F #1F8C30

square

#1F448C #8C1F7A #8C671F #1F8C30

split-complementary

#1F448C #8C301F #7A8C1F

monochromatic

#091328 #142C5A #1F448C #2A5CBE #4E7DD8

Accessibility & contrast

On white

9.28

#1F448C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1F448C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F448C

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F448C	#FFFFFF	#000000	##FFFFFF
##1F448C	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184C8F

Deuteranopia (green-blind)

#00428B

Tritanopia (blue-blind)

#005561

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f448c;
/* rgb */ color: rgb(31, 68, 140);
/* oklch */ color: oklch(40.3% 0.127 262.0);

Tailwind

colors: {
  custom: {
    50: '#6c77ae',
    500: '#1f448c',
    950: '#000000',
  },
}

SCSS

$custom: #1f448c;
$custom-light: #6c77ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f448c",
  "rgb": {
    "r": 31,
    "g": 68,
    "b": 140
  },
  "hsl": {
    "h": 219.633,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.40302,
    "c": 0.12733,
    "h": 262
  },
  "luminance": 0.06319
}

Semantic roles & 50–950 ramp

primary

#1F448C

secondary

#BB954C

accent

#AF41E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F448C

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

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