#1F3F91#1F3F91

#1F3F91 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.6% C 0.141 H 264.6°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F91
RGB	rgb(31, 63, 145)
HSL	hsl(223, 65%, 35%)
HSV	hsv(223, 79%, 57%)
CMYK	cmyk(78.6%, 56.6%, 0%, 43.1%)
CIE-LAB	lab(29.13, 19.46, -48.65)
CIE-LCH	lch(29.13, 52.39, 291.80°)
OKLab	oklab(39.61% -0.0133 -0.1403)
OKLCH	oklch(39.61% 0.141 264.6)
XYZ	xyz(7.4516, 5.8898, 27.5267)
Luminance	0.0589 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F91 #91711F

analogous

#1F7891 #1F3F91 #381F91

triadic

#1F3F91 #911F3F #3F911F

tetradic

#1F3F91 #911F78 #91711F #1F9138

square

#1F3F91 #911F78 #91711F #1F9138

split-complementary

#1F3F91 #91381F #78911F

monochromatic

#09132C #14295F #1F3F91 #2A55C3 #5177DA

Accessibility & contrast

On white

9.64

#1F3F91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1F3F91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F91

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F91	#FFFFFF	#000000	##FFFFFF
##1F3F91	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A94

Deuteranopia (green-blind)

#00408F

Tritanopia (blue-blind)

#005361

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3f91;
/* rgb */ color: rgb(31, 63, 145);
/* oklch */ color: oklch(39.6% 0.141 264.6);

Tailwind

colors: {
  custom: {
    50: '#6d73b2',
    500: '#1f3f91',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f91;
$custom-light: #6d73b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f91",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 145
  },
  "hsl": {
    "h": 223.158,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.39609,
    "c": 0.14094,
    "h": 264.6
  },
  "luminance": 0.05891
}

Semantic roles & 50–950 ramp

primary

#1F3F91

secondary

#BD9E4F

accent

#B940E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F3F91

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

Preview Lab → · Contrast checker → · Palette generator →