#1F3EB4#1F3EB4

#1F3EB4 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.6% C 0.190 H 266.3°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#1F3EB4
RGB	rgb(31, 62, 180)
HSL	hsl(228, 71%, 41%)
HSV	hsv(228, 83%, 71%)
CMYK	cmyk(82.8%, 65.6%, 0%, 29.4%)
CIE-LAB	lab(31.88, 33.72, -65.29)
CIE-LCH	lch(31.88, 73.48, 297.32°)
OKLab	oklab(42.58% -0.0121 -0.1891)
OKLCH	oklch(42.58% 0.19 266.3)
XYZ	xyz(10.5230, 7.0306, 43.9736)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3EB4 #B4951F

analogous

#1F89B4 #1F3EB4 #4B1FB4

triadic

#1F3EB4 #B41F3E #3EB41F

tetradic

#1F3EB4 #B41F89 #B4951F #1FB44B

square

#1F3EB4 #B41F89 #B4951F #1FB44B

split-complementary

#1F3EB4 #B44B1F #89B41F

monochromatic

#0D1A4C #162C80 #1F3EB4 #3457DC #6882E5

Accessibility & contrast

On white

8.73

#1F3EB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1F3EB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3EB4

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3EB4	#FFFFFF	#000000	##FFFFFF
##1F3EB4	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B8

Deuteranopia (green-blind)

#0044B2

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f3eb4;
/* rgb */ color: rgb(31, 62, 180);
/* oklch */ color: oklch(42.6% 0.190 266.3);

Tailwind

colors: {
  custom: {
    50: '#7673cc',
    500: '#1f3eb4',
    950: '#000000',
  },
}

SCSS

$custom: #1f3eb4;
$custom-light: #7673cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3eb4",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 180
  },
  "hsl": {
    "h": 227.517,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.42583,
    "c": 0.1895,
    "h": 266.3
  },
  "luminance": 0.07032
}

Semantic roles & 50–950 ramp

primary

#1F3EB4

secondary

#CBB564

accent

#C83AED

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F3EB4

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

Preview Lab → · Contrast checker → · Palette generator →