#1F4B8D#1F4B8D

#1F4B8D is a dark, moderate blue. Relative luminance 0.072; OKLCH L 42.0% C 0.120 H 258.6°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B8D
RGB	rgb(31, 75, 141)
HSL	hsl(216, 64%, 34%)
HSV	hsv(216, 78%, 55%)
CMYK	cmyk(78%, 46.8%, 0%, 44.7%)
CIE-LAB	lab(32.36, 9.64, -40.98)
CIE-LCH	lch(32.36, 42.10, 283.24°)
OKLab	oklab(41.98% -0.0237 -0.1175)
OKLCH	oklch(41.98% 0.12 258.6)
XYZ	xyz(7.8871, 7.2456, 26.1770)
Luminance	0.0725 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B8D #8D611F

analogous

#1F828D #1F4B8D #2A1F8D

triadic

#1F4B8D #8D1F4B #4B8D1F

tetradic

#1F4B8D #8D1F82 #8D611F #1F8D2A

square

#1F4B8D #8D1F82 #8D611F #1F8D2A

split-complementary

#1F4B8D #8D2A1F #828D1F

monochromatic

#091629 #14305B #1F4B8D #2A66BF #4E85D8

Accessibility & contrast

On white

8.57

#1F4B8D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#1F4B8D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B8D

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B8D	#FFFFFF	#000000	##FFFFFF
##1F4B8D	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#28518F

Deuteranopia (green-blind)

#0F478C

Tritanopia (blue-blind)

#005B65

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f4b8d;
/* rgb */ color: rgb(31, 75, 141);
/* oklch */ color: oklch(42.0% 0.120 258.6);

Tailwind

colors: {
  custom: {
    50: '#6c7caf',
    500: '#1f4b8d',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b8d;
$custom-light: #6c7caf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b8d",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 141
  },
  "hsl": {
    "h": 216,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.41981,
    "c": 0.11989,
    "h": 258.6
  },
  "luminance": 0.07247
}

Semantic roles & 50–950 ramp

primary

#1F4B8D

secondary

#BB8F4D

accent

#A541E7

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F4B8D

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

Preview Lab → · Contrast checker → · Palette generator →