#1F3B91#1F3B91

#1F3B91 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.146 H 266.0°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#1F3B91
RGB	rgb(31, 59, 145)
HSL	hsl(225, 65%, 35%)
HSV	hsv(225, 79%, 57%)
CMYK	cmyk(78.6%, 59.3%, 0%, 43.1%)
CIE-LAB	lab(28.01, 22.22, -50.47)
CIE-LCH	lch(28.01, 55.14, 293.76°)
OKLab	oklab(38.77% -0.0103 -0.1457)
OKLCH	oklch(38.77% 0.146 266)
XYZ	xyz(7.2381, 5.4628, 27.4555)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3B91 #91751F

analogous

#1F7491 #1F3B91 #3C1F91

triadic

#1F3B91 #911F3B #3B911F

tetradic

#1F3B91 #911F74 #91751F #1F913C

square

#1F3B91 #911F74 #91751F #1F913C

split-complementary

#1F3B91 #913C1F #74911F

monochromatic

#09122C #14265F #1F3B91 #2A50C3 #5172DA

Accessibility & contrast

On white

10.03

#1F3B91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1F3B91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3B91

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3B91	#FFFFFF	#000000	##FFFFFF
##1F3B91	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004894

Deuteranopia (green-blind)

#003D8F

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3b91;
/* rgb */ color: rgb(31, 59, 145);
/* oklch */ color: oklch(38.8% 0.146 266.0);

Tailwind

colors: {
  custom: {
    50: '#6d70b2',
    500: '#1f3b91',
    950: '#000000',
  },
}

SCSS

$custom: #1f3b91;
$custom-light: #6d70b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3b91",
  "rgb": {
    "r": 31,
    "g": 59,
    "b": 145
  },
  "hsl": {
    "h": 225.263,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.38769,
    "c": 0.14608,
    "h": 266
  },
  "luminance": 0.05464
}

Semantic roles & 50–950 ramp

primary

#1F3B91

secondary

#BDA24F

accent

#BF40E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3B91

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

Preview Lab → · Contrast checker → · Palette generator →