#1F3F90#1F3F90

#1F3F90 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.5% C 0.140 H 264.5°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F90
RGB	rgb(31, 63, 144)
HSL	hsl(223, 65%, 34%)
HSV	hsv(223, 78%, 56%)
CMYK	cmyk(78.5%, 56.3%, 0%, 43.5%)
CIE-LAB	lab(29.05, 19.06, -48.16)
CIE-LCH	lch(29.05, 51.80, 291.59°)
OKLab	oklab(39.53% -0.0133 -0.1389)
OKLCH	oklch(39.53% 0.14 264.5)
XYZ	xyz(7.3748, 5.8591, 27.1224)
Luminance	0.0586 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F90 #90701F

analogous

#1F7890 #1F3F90 #381F90

triadic

#1F3F90 #901F3F #3F901F

tetradic

#1F3F90 #901F78 #90701F #1F9038

square

#1F3F90 #901F78 #90701F #1F9038

split-complementary

#1F3F90 #90381F #78901F

monochromatic

#09132B #14295E #1F3F90 #2A55C2 #5077D9

Accessibility & contrast

On white

9.67

#1F3F90 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1F3F90 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F90

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F90	#FFFFFF	#000000	##FFFFFF
##1F3F90	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A93

Deuteranopia (green-blind)

#00408E

Tritanopia (blue-blind)

#005361

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f3f90;
/* rgb */ color: rgb(31, 63, 144);
/* oklch */ color: oklch(39.5% 0.140 264.5);

Tailwind

colors: {
  custom: {
    50: '#6d73b1',
    500: '#1f3f90',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f90;
$custom-light: #6d73b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f90",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 144
  },
  "hsl": {
    "h": 223.009,
    "s": 64.571,
    "l": 34.314
  },
  "oklch": {
    "l": 0.39525,
    "c": 0.13952,
    "h": 264.5
  },
  "luminance": 0.0586
}

Semantic roles & 50–950 ramp

primary

#1F3F90

secondary

#BC9D4E

accent

#B840E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F3F90

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

Preview Lab → · Contrast checker → · Palette generator →