#1F3C8E#1F3C8E

#1F3C8E is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.141 H 265.4°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#1F3C8E
RGB	rgb(31, 60, 142)
HSL	hsl(224, 64%, 34%)
HSV	hsv(224, 78%, 56%)
CMYK	cmyk(78.2%, 57.7%, 0%, 44.3%)
CIE-LAB	lab(28.05, 20.34, -48.56)
CIE-LCH	lch(28.05, 52.65, 292.72°)
OKLab	oklab(38.72% -0.0112 -0.1401)
OKLCH	oklch(38.72% 0.141 265.4)
XYZ	xyz(7.0617, 5.4752, 26.2706)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3C8E #8E711F

analogous

#1F748E #1F3C8E #3A1F8E

triadic

#1F3C8E #8E1F3C #3C8E1F

tetradic

#1F3C8E #8E1F74 #8E711F #1F8E3A

square

#1F3C8E #8E1F74 #8E711F #1F8E3A

split-complementary

#1F3C8E #8E3A1F #748E1F

monochromatic

#09122A #14275C #1F3C8E #2A51C0 #4F73D9

Accessibility & contrast

On white

10.02

#1F3C8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1F3C8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3C8E

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3C8E	#FFFFFF	#000000	##FFFFFF
##1F3C8E	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004891

Deuteranopia (green-blind)

#003D8C

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3c8e;
/* rgb */ color: rgb(31, 60, 142);
/* oklch */ color: oklch(38.7% 0.141 265.4);

Tailwind

colors: {
  custom: {
    50: '#6d71b0',
    500: '#1f3c8e',
    950: '#000000',
  },
}

SCSS

$custom: #1f3c8e;
$custom-light: #6d71b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3c8e",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 142
  },
  "hsl": {
    "h": 224.324,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.38717,
    "c": 0.14057,
    "h": 265.4
  },
  "luminance": 0.05476
}

Semantic roles & 50–950 ramp

primary

#1F3C8E

secondary

#BB9F4D

accent

#BC41E7

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F3C8E

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

Preview Lab → · Contrast checker → · Palette generator →