#1F4B9D#1F4B9D

#1F4B9D is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.2% C 0.142 H 261.4°. Best body text is #FFFFFF at 8.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B9D
RGB	rgb(31, 75, 157)
HSL	hsl(219, 67%, 37%)
HSV	hsv(219, 80%, 62%)
CMYK	cmyk(80.3%, 52.2%, 0%, 38.4%)
CIE-LAB	lab(33.47, 16.04, -48.92)
CIE-LCH	lch(33.47, 51.48, 288.16°)
OKLab	oklab(43.19% -0.0212 -0.1409)
OKLCH	oklch(43.19% 0.142 261.4)
XYZ	xyz(9.1648, 7.7567, 32.9059)
Luminance	0.0776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B9D #9D711F

analogous

#1F8A9D #1F4B9D #321F9D

triadic

#1F4B9D #9D1F4B #4B9D1F

tetradic

#1F4B9D #9D1F8A #9D711F #1F9D32

square

#1F4B9D #9D1F8A #9D711F #1F9D32

split-complementary

#1F4B9D #9D321F #8A9D1F

monochromatic

#0B1A37 #15336A #1F4B9D #2963D0 #5887DE

Accessibility & contrast

On white

8.23

#1F4B9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#1F4B9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B9D

8.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B9D	#FFFFFF	#000000	##FFFFFF
##1F4B9D	1.00	8.23	2.55	8.23
#FFFFFF	8.23	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1455A0

Deuteranopia (green-blind)

#00499B

Tritanopia (blue-blind)

#005F6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1f4b9d;
/* rgb */ color: rgb(31, 75, 157);
/* oklch */ color: oklch(43.2% 0.142 261.4);

Tailwind

colors: {
  custom: {
    50: '#6f7cba',
    500: '#1f4b9d',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b9d;
$custom-light: #6f7cba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b9d",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 157
  },
  "hsl": {
    "h": 219.048,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.43188,
    "c": 0.14247,
    "h": 261.4
  },
  "luminance": 0.07758
}

Semantic roles & 50–950 ramp

primary

#1F4B9D

secondary

#C29C56

accent

#AE3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4B9D

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

Preview Lab → · Contrast checker → · Palette generator →