#1F4C91#1F4C91

#1F4C91 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 42.5% C 0.124 H 258.9°. Best body text is #FFFFFF at 8.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F4C91
RGB	rgb(31, 76, 145)
HSL	hsl(216, 65%, 35%)
HSV	hsv(216, 79%, 57%)
CMYK	cmyk(78.6%, 47.6%, 0%, 43.1%)
CIE-LAB	lab(32.93, 10.57, -42.52)
CIE-LCH	lch(32.93, 43.81, 283.96°)
OKLab	oklab(42.5% -0.0238 -0.122)
OKLCH	oklch(42.5% 0.124 258.9)
XYZ	xyz(8.2585, 7.5036, 27.7957)
Luminance	0.0751 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4C91 #91641F

analogous

#1F8591 #1F4C91 #2B1F91

triadic

#1F4C91 #911F4C #4C911F

tetradic

#1F4C91 #911F85 #91641F #1F912B

square

#1F4C91 #911F85 #91641F #1F912B

split-complementary

#1F4C91 #912B1F #85911F

monochromatic

#09172C #14325F #1F4C91 #2A66C3 #5187DA

Accessibility & contrast

On white

8.40

#1F4C91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1F4C91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4C91

8.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4C91	#FFFFFF	#000000	##FFFFFF
##1F4C91	1.00	8.40	2.50	8.40
#FFFFFF	8.40	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#275394

Deuteranopia (green-blind)

#094990

Tritanopia (blue-blind)

#005C67

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f4c91;
/* rgb */ color: rgb(31, 76, 145);
/* oklch */ color: oklch(42.5% 0.124 258.9);

Tailwind

colors: {
  custom: {
    50: '#6c7db2',
    500: '#1f4c91',
    950: '#000000',
  },
}

SCSS

$custom: #1f4c91;
$custom-light: #6c7db2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4c91",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 145
  },
  "hsl": {
    "h": 216.316,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.42503,
    "c": 0.12433,
    "h": 258.9
  },
  "luminance": 0.07505
}

Semantic roles & 50–950 ramp

primary

#1F4C91

secondary

#BD914F

accent

#A640E8

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4C91

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

Preview Lab → · Contrast checker → · Palette generator →