#1F3DA1#1F3DA1

#1F3DA1 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.6% C 0.166 H 266.1°. Best body text is #FFFFFF at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F3DA1
RGB	rgb(31, 61, 161)
HSL	hsl(226, 68%, 38%)
HSV	hsv(226, 81%, 63%)
CMYK	cmyk(80.7%, 62.1%, 0%, 36.9%)
CIE-LAB	lab(29.91, 27.12, -57.12)
CIE-LCH	lch(29.91, 63.24, 295.40°)
OKLab	oklab(40.61% -0.0113 -0.1652)
OKLCH	oklch(40.61% 0.166 266.1)
XYZ	xyz(8.6646, 6.2010, 34.4516)
Luminance	0.0620 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3DA1 #A1831F

analogous

#1F7EA1 #1F3DA1 #421FA1

triadic

#1F3DA1 #A11F3D #3DA11F

tetradic

#1F3DA1 #A11F7E #A1831F #1FA142

square

#1F3DA1 #A11F7E #A1831F #1FA142

split-complementary

#1F3DA1 #A1421F #7EA11F

monochromatic

#0B163A #152A6E #1F3DA1 #2950D4 #5B7ADF

Accessibility & contrast

On white

9.37

#1F3DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1F3DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3DA1

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3DA1	#FFFFFF	#000000	##FFFFFF
##1F3DA1	1.00	9.37	2.24	9.37
#FFFFFF	9.37	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3da1;
/* rgb */ color: rgb(31, 61, 161);
/* oklch */ color: oklch(40.6% 0.166 266.1);

Tailwind

colors: {
  custom: {
    50: '#7172be',
    500: '#1f3da1',
    950: '#000000',
  },
}

SCSS

$custom: #1f3da1;
$custom-light: #7172be;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3da1",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 161
  },
  "hsl": {
    "h": 226.154,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40609,
    "c": 0.1656,
    "h": 266.1
  },
  "luminance": 0.06202
}

Semantic roles & 50–950 ramp

primary

#1F3DA1

secondary

#C4AB58

accent

#C33DEB

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3DA1

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

Preview Lab → · Contrast checker → · Palette generator →