#1F3E83#1F3E83

#1F3E83 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.2% C 0.122 H 263.5°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E83
RGB	rgb(31, 62, 131)
HSL	hsl(221, 62%, 32%)
HSV	hsv(221, 76%, 51%)
CMYK	cmyk(76.3%, 52.7%, 0%, 48.6%)
CIE-LAB	lab(27.78, 14.54, -42.18)
CIE-LCH	lch(27.78, 44.62, 289.02°)
OKLab	oklab(38.24% -0.0138 -0.1213)
OKLCH	oklch(38.24% 0.122 263.5)
XYZ	xyz(6.3830, 5.3746, 22.1693)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E83 #83641F

analogous

#1F7083 #1F3E83 #321F83

triadic

#1F3E83 #831F3E #3E831F

tetradic

#1F3E83 #831F70 #83641F #1F8332

square

#1F3E83 #831F70 #83641F #1F8332

split-complementary

#1F3E83 #83321F #70831F

monochromatic

#080F20 #132752 #1F3E83 #2B55B4 #4974D4

Accessibility & contrast

On white

10.12

#1F3E83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1F3E83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E83

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E83	#FFFFFF	#000000	##FFFFFF
##1F3E83	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134685

Deuteranopia (green-blind)

#003D82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3e83;
/* rgb */ color: rgb(31, 62, 131);
/* oklch */ color: oklch(38.2% 0.122 263.5);

Tailwind

colors: {
  custom: {
    50: '#6a72a8',
    500: '#1f3e83',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e83;
$custom-light: #6a72a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e83",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 131
  },
  "hsl": {
    "h": 221.4,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38243,
    "c": 0.12209,
    "h": 263.5
  },
  "luminance": 0.05375
}

Semantic roles & 50–950 ramp

primary

#1F3E83

secondary

#B69448

accent

#B343E5

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F3E83

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

Preview Lab → · Contrast checker → · Palette generator →