#1F3C99#1F3C99

#1F3C99 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.7% C 0.156 H 266.0°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F3C99
RGB	rgb(31, 60, 153)
HSL	hsl(226, 66%, 36%)
HSV	hsv(226, 80%, 60%)
CMYK	cmyk(79.7%, 60.8%, 0%, 40%)
CIE-LAB	lab(28.96, 24.68, -53.83)
CIE-LCH	lch(28.96, 59.21, 294.63°)
OKLab	oklab(39.68% -0.0107 -0.1556)
OKLCH	oklch(39.68% 0.156 266)
XYZ	xyz(7.9287, 5.8220, 30.8367)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3C99 #997C1F

analogous

#1F7999 #1F3C99 #3F1F99

triadic

#1F3C99 #991F3C #3C991F

tetradic

#1F3C99 #991F79 #997C1F #1F993F

square

#1F3C99 #991F79 #997C1F #1F993F

split-complementary

#1F3C99 #993F1F #79991F

monochromatic

#0A1433 #152866 #1F3C99 #2950CC #5676DD

Accessibility & contrast

On white

9.70

#1F3C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1F3C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3C99

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3C99	#FFFFFF	#000000	##FFFFFF
##1F3C99	1.00	9.70	2.16	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9C

Deuteranopia (green-blind)

#003F97

Tritanopia (blue-blind)

#005464

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f3c99;
/* rgb */ color: rgb(31, 60, 153);
/* oklch */ color: oklch(39.7% 0.156 266.0);

Tailwind

colors: {
  custom: {
    50: '#6f71b8',
    500: '#1f3c99',
    950: '#000000',
  },
}

SCSS

$custom: #1f3c99;
$custom-light: #6f71b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3c99",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 153
  },
  "hsl": {
    "h": 225.738,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39684,
    "c": 0.15594,
    "h": 266
  },
  "luminance": 0.05823
}

Semantic roles & 50–950 ramp

primary

#1F3C99

secondary

#C0A654

accent

#C13FE9

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1F3C99

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

Preview Lab → · Contrast checker → · Palette generator →