#1F4780#1F4780

#1F4780 is a dark, moderate blue. Relative luminance 0.064; OKLCH L 40.1% C 0.106 H 257.7°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#1F4780
RGB	rgb(31, 71, 128)
HSL	hsl(215, 61%, 31%)
HSV	hsv(215, 76%, 50%)
CMYK	cmyk(75.8%, 44.5%, 0%, 49.8%)
CIE-LAB	lab(30.29, 7.14, -36.27)
CIE-LCH	lch(30.29, 36.97, 281.14°)
OKLab	oklab(40.11% -0.0226 -0.1037)
OKLCH	oklch(40.11% 0.106 257.7)
XYZ	xyz(6.7132, 6.3556, 21.2908)
Luminance	0.0636 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4780 #80581F

analogous

#1F7780 #1F4780 #281F80

triadic

#1F4780 #801F47 #47801F

tetradic

#1F4780 #801F77 #80581F #1F8028

square

#1F4780 #801F77 #80581F #1F8028

split-complementary

#1F4780 #80281F #77801F

monochromatic

#07101D #132C4F #1F4780 #2B62B1 #4780D2

Accessibility & contrast

On white

9.25

#1F4780 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1F4780 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4780

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4780	#FFFFFF	#000000	##FFFFFF
##1F4780	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B4C82

Deuteranopia (green-blind)

#1A437F

Tritanopia (blue-blind)

#00545D

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f4780;
/* rgb */ color: rgb(31, 71, 128);
/* oklch */ color: oklch(40.1% 0.106 257.7);

Tailwind

colors: {
  custom: {
    50: '#6979a5',
    500: '#1f4780',
    950: '#000000',
  },
}

SCSS

$custom: #1f4780;
$custom-light: #6979a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4780",
  "rgb": {
    "r": 31,
    "g": 71,
    "b": 128
  },
  "hsl": {
    "h": 215.258,
    "s": 61.006,
    "l": 31.176
  },
  "oklch": {
    "l": 0.4011,
    "c": 0.10619,
    "h": 257.7
  },
  "luminance": 0.06356
}

Semantic roles & 50–950 ramp

primary

#1F4780

secondary

#B38748

accent

#A244E4

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #1F4780

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

Preview Lab → · Contrast checker → · Palette generator →