#1F3CA7#1F3CA7

#1F3CA7 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.0% C 0.175 H 266.5°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#1F3CA7
RGB	rgb(31, 60, 167)
HSL	hsl(227, 69%, 39%)
HSV	hsv(227, 81%, 65%)
CMYK	cmyk(81.4%, 64.1%, 0%, 34.5%)
CIE-LAB	lab(30.19, 30.11, -60.29)
CIE-LCH	lch(30.19, 67.39, 296.53°)
OKLab	oklab(40.97% -0.0107 -0.1745)
OKLCH	oklch(40.97% 0.175 266.5)
XYZ	xyz(9.1535, 6.3120, 37.2876)
Luminance	0.0631 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3CA7 #A78A1F

analogous

#1F80A7 #1F3CA7 #461FA7

triadic

#1F3CA7 #A71F3C #3CA71F

tetradic

#1F3CA7 #A71F80 #A78A1F #1FA746

square

#1F3CA7 #A71F80 #A78A1F #1FA746

split-complementary

#1F3CA7 #A7461F #80A71F

monochromatic

#0C1740 #152973 #1F3CA7 #2B50D8 #5F7BE1

Accessibility & contrast

On white

9.28

#1F3CA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1F3CA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3CA7

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3CA7	#FFFFFF	#000000	##FFFFFF
##1F3CA7	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAA

Deuteranopia (green-blind)

#0041A5

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f3ca7;
/* rgb */ color: rgb(31, 60, 167);
/* oklch */ color: oklch(41.0% 0.175 266.5);

Tailwind

colors: {
  custom: {
    50: '#7371c2',
    500: '#1f3ca7',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ca7;
$custom-light: #7371c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ca7",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 167
  },
  "hsl": {
    "h": 227.206,
    "s": 68.687,
    "l": 38.824
  },
  "oklch": {
    "l": 0.40974,
    "c": 0.17485,
    "h": 266.5
  },
  "luminance": 0.06313
}

Semantic roles & 50–950 ramp

primary

#1F3CA7

secondary

#C6AF5C

accent

#C63CEC

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #1F3CA7

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

Preview Lab → · Contrast checker → · Palette generator →