#1F4C8F#1F4C8F

#1F4C8F is a dark, vivid blue. Relative luminance 0.074; OKLCH L 42.4% C 0.121 H 258.5°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#1F4C8F
RGB	rgb(31, 76, 143)
HSL	hsl(216, 64%, 34%)
HSV	hsv(216, 78%, 56%)
CMYK	cmyk(78.3%, 46.9%, 0%, 43.9%)
CIE-LAB	lab(32.79, 9.77, -41.51)
CIE-LCH	lch(32.79, 42.64, 283.24°)
OKLab	oklab(42.36% -0.0242 -0.119)
OKLCH	oklch(42.36% 0.121 258.5)
XYZ	xyz(8.1056, 7.4424, 26.9906)
Luminance	0.0744 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4C8F #8F621F

analogous

#1F848F #1F4C8F #2A1F8F

triadic

#1F4C8F #8F1F4C #4C8F1F

tetradic

#1F4C8F #8F1F84 #8F621F #1F8F2A

square

#1F4C8F #8F1F84 #8F621F #1F8F2A

split-complementary

#1F4C8F #8F2A1F #848F1F

monochromatic

#09172A #14315D #1F4C8F #2A67C1 #4F87D9

Accessibility & contrast

On white

8.44

#1F4C8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#1F4C8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4C8F

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4C8F	#FFFFFF	#000000	##FFFFFF
##1F4C8F	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#295392

Deuteranopia (green-blind)

#0F488E

Tritanopia (blue-blind)

#005C66

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f4c8f;
/* rgb */ color: rgb(31, 76, 143);
/* oklch */ color: oklch(42.4% 0.121 258.5);

Tailwind

colors: {
  custom: {
    50: '#6c7db0',
    500: '#1f4c8f',
    950: '#000000',
  },
}

SCSS

$custom: #1f4c8f;
$custom-light: #6c7db0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4c8f",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 143
  },
  "hsl": {
    "h": 215.893,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.42358,
    "c": 0.12149,
    "h": 258.5
  },
  "luminance": 0.07443
}

Semantic roles & 50–950 ramp

primary

#1F4C8F

secondary

#BC904E

accent

#A440E7

background

#F7F7FA

surface

#EDEEF5

border

#C8C9CF

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #1F4C8F

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

Preview Lab → · Contrast checker → · Palette generator →