#1F4A91#1F4A91

#1F4A91 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.0% C 0.127 H 260.0°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A91
RGB	rgb(31, 74, 145)
HSL	hsl(217, 65%, 35%)
HSV	hsv(217, 79%, 57%)
CMYK	cmyk(78.6%, 49%, 0%, 43.1%)
CIE-LAB	lab(32.33, 11.92, -43.48)
CIE-LCH	lch(32.33, 45.08, 285.33°)
OKLab	oklab(42.04% -0.0221 -0.1249)
OKLCH	oklch(42.04% 0.127 260)
XYZ	xyz(8.1228, 7.2323, 27.7504)
Luminance	0.0723 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A91 #91661F

analogous

#1F8391 #1F4A91 #2D1F91

triadic

#1F4A91 #911F4A #4A911F

tetradic

#1F4A91 #911F83 #91661F #1F912D

square

#1F4A91 #911F83 #91661F #1F912D

split-complementary

#1F4A91 #912D1F #83911F

monochromatic

#09172C #14305F #1F4A91 #2A64C3 #5184DA

Accessibility & contrast

On white

8.58

#1F4A91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#1F4A91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A91

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A91	#FFFFFF	#000000	##FFFFFF
##1F4A91	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#225294

Deuteranopia (green-blind)

#004790

Tritanopia (blue-blind)

#005B66

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f4a91;
/* rgb */ color: rgb(31, 74, 145);
/* oklch */ color: oklch(42.0% 0.127 260.0);

Tailwind

colors: {
  custom: {
    50: '#6d7bb2',
    500: '#1f4a91',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a91;
$custom-light: #6d7bb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a91",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 145
  },
  "hsl": {
    "h": 217.368,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.42044,
    "c": 0.12683,
    "h": 260
  },
  "luminance": 0.07233
}

Semantic roles & 50–950 ramp

primary

#1F4A91

secondary

#BD934F

accent

#A840E8

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4A91

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

Preview Lab → · Contrast checker → · Palette generator →