#1F4391#1F4391

#1F4391 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.5% C 0.136 H 263.1°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F4391
RGB	rgb(31, 67, 145)
HSL	hsl(221, 65%, 35%)
HSV	hsv(221, 79%, 57%)
CMYK	cmyk(78.6%, 53.8%, 0%, 43.1%)
CIE-LAB	lab(30.28, 16.70, -46.79)
CIE-LCH	lch(30.28, 49.68, 289.65°)
OKLab	oklab(40.48% -0.0164 -0.1348)
OKLCH	oklch(40.48% 0.136 263.1)
XYZ	xyz(7.6812, 6.3491, 27.6032)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4391 #916D1F

analogous

#1F7C91 #1F4391 #341F91

triadic

#1F4391 #911F43 #43911F

tetradic

#1F4391 #911F7C #916D1F #1F9134

square

#1F4391 #911F7C #916D1F #1F9134

split-complementary

#1F4391 #91341F #7C911F

monochromatic

#09142C #142C5F #1F4391 #2A5AC3 #517CDA

Accessibility & contrast

On white

9.25

#1F4391 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F4391 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4391

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4391	#FFFFFF	#000000	##FFFFFF
##1F4391	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A4D94

Deuteranopia (green-blind)

#00428F

Tritanopia (blue-blind)

#005663

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f4391;
/* rgb */ color: rgb(31, 67, 145);
/* oklch */ color: oklch(40.5% 0.136 263.1);

Tailwind

colors: {
  custom: {
    50: '#6d76b2',
    500: '#1f4391',
    950: '#000000',
  },
}

SCSS

$custom: #1f4391;
$custom-light: #6d76b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4391",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 145
  },
  "hsl": {
    "h": 221.053,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.40476,
    "c": 0.13577,
    "h": 263.1
  },
  "luminance": 0.0635
}

Semantic roles & 50–950 ramp

primary

#1F4391

secondary

#BD9A4F

accent

#B340E8

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F4391

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

Preview Lab → · Contrast checker → · Palette generator →