#1F3980#1F3980

#1F3980 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.9% C 0.124 H 265.5°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#1F3980
RGB	rgb(31, 57, 128)
HSL	hsl(224, 61%, 31%)
HSV	hsv(224, 76%, 50%)
CMYK	cmyk(75.8%, 55.5%, 0%, 49.8%)
CIE-LAB	lab(26.09, 16.83, -43.04)
CIE-LCH	lch(26.09, 46.22, 291.36°)
OKLab	oklab(36.89% -0.0098 -0.1239)
OKLCH	oklch(36.89% 0.124 265.5)
XYZ	xyz(5.9231, 4.7754, 21.0275)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3980 #80661F

analogous

#1F6980 #1F3980 #361F80

triadic

#1F3980 #801F39 #39801F

tetradic

#1F3980 #801F69 #80661F #1F8036

square

#1F3980 #801F69 #80661F #1F8036

split-complementary

#1F3980 #80361F #69801F

monochromatic

#070D1D #13234F #1F3980 #2B4FB1 #476CD2

Accessibility & contrast

On white

10.74

#1F3980 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1F3980 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3980

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3980	#FFFFFF	#000000	##FFFFFF
##1F3980	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#034282

Deuteranopia (green-blind)

#00397F

Tritanopia (blue-blind)

#004A56

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3980;
/* rgb */ color: rgb(31, 57, 128);
/* oklch */ color: oklch(36.9% 0.124 265.5);

Tailwind

colors: {
  custom: {
    50: '#696ea5',
    500: '#1f3980',
    950: '#000000',
  },
}

SCSS

$custom: #1f3980;
$custom-light: #696ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3980",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 128
  },
  "hsl": {
    "h": 223.918,
    "s": 61.006,
    "l": 31.176
  },
  "oklch": {
    "l": 0.36888,
    "c": 0.12432,
    "h": 265.5
  },
  "luminance": 0.04776
}

Semantic roles & 50–950 ramp

primary

#1F3980

secondary

#B39648

accent

#B944E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F3980

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

Preview Lab → · Contrast checker → · Palette generator →