#1F4B8F#1F4B8F

#1F4B8F is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.1% C 0.123 H 259.0°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B8F
RGB	rgb(31, 75, 143)
HSL	hsl(216, 64%, 34%)
HSV	hsv(216, 78%, 56%)
CMYK	cmyk(78.3%, 47.6%, 0%, 43.9%)
CIE-LAB	lab(32.49, 10.44, -41.99)
CIE-LCH	lch(32.49, 43.27, 283.96°)
OKLab	oklab(42.13% -0.0233 -0.1205)
OKLCH	oklch(42.13% 0.123 259)
XYZ	xyz(8.0373, 7.3057, 26.9678)
Luminance	0.0731 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B8F #8F631F

analogous

#1F838F #1F4B8F #2B1F8F

triadic

#1F4B8F #8F1F4B #4B8F1F

tetradic

#1F4B8F #8F1F83 #8F631F #1F8F2B

square

#1F4B8F #8F1F83 #8F631F #1F8F2B

split-complementary

#1F4B8F #8F2B1F #838F1F

monochromatic

#09162A #14315D #1F4B8F #2A65C1 #4F85D9

Accessibility & contrast

On white

8.53

#1F4B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#1F4B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B8F

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B8F	#FFFFFF	#000000	##FFFFFF
##1F4B8F	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#275292

Deuteranopia (green-blind)

#0A488E

Tritanopia (blue-blind)

#005B66

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f4b8f;
/* rgb */ color: rgb(31, 75, 143);
/* oklch */ color: oklch(42.1% 0.123 259.0);

Tailwind

colors: {
  custom: {
    50: '#6c7cb0',
    500: '#1f4b8f',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b8f;
$custom-light: #6c7cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b8f",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 143
  },
  "hsl": {
    "h": 216.429,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.42126,
    "c": 0.12274,
    "h": 259
  },
  "luminance": 0.07307
}

Semantic roles & 50–950 ramp

primary

#1F4B8F

secondary

#BC914E

accent

#A640E7

background

#F7F7FA

surface

#EDEEF5

border

#C8C9CF

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #1F4B8F

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

Preview Lab → · Contrast checker → · Palette generator →