#1F3C87#1F3C87

#1F3C87 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.1% C 0.131 H 264.9°. Best body text is #FFFFFF at 10.22:1 contrast (WCAG AA passes).

Color values

HEX	#1F3C87
RGB	rgb(31, 60, 135)
HSL	hsl(223, 63%, 33%)
HSV	hsv(223, 77%, 53%)
CMYK	cmyk(77%, 55.6%, 0%, 47.1%)
CIE-LAB	lab(27.49, 17.54, -45.13)
CIE-LCH	lch(27.49, 48.42, 291.24°)
OKLab	oklab(38.13% -0.0117 -0.13)
OKLCH	oklch(38.13% 0.131 264.9)
XYZ	xyz(6.5526, 5.2716, 23.5891)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3C87 #876A1F

analogous

#1F7087 #1F3C87 #361F87

triadic

#1F3C87 #871F3C #3C871F

tetradic

#1F3C87 #871F70 #876A1F #1F8736

square

#1F3C87 #871F70 #876A1F #1F8736

split-complementary

#1F3C87 #87361F #70871F

monochromatic

#081023 #142655 #1F3C87 #2A52B9 #4B71D6

Accessibility & contrast

On white

10.22

#1F3C87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1F3C87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3C87

10.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3C87	#FFFFFF	#000000	##FFFFFF
##1F3C87	1.00	10.22	2.05	10.22
#FFFFFF	10.22	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468A

Deuteranopia (green-blind)

#003C86

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f3c87;
/* rgb */ color: rgb(31, 60, 135);
/* oklch */ color: oklch(38.1% 0.131 264.9);

Tailwind

colors: {
  custom: {
    50: '#6b71ab',
    500: '#1f3c87',
    950: '#000000',
  },
}

SCSS

$custom: #1f3c87;
$custom-light: #6b71ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3c87",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 135
  },
  "hsl": {
    "h": 223.269,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38126,
    "c": 0.13055,
    "h": 264.9
  },
  "luminance": 0.05272
}

Semantic roles & 50–950 ramp

primary

#1F3C87

secondary

#B8994A

accent

#B842E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3C87

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

Preview Lab → · Contrast checker → · Palette generator →