#1F107D#1F107D

#1F107D is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.6% C 0.166 H 275.3°. Best body text is #FFFFFF at 14.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F107D
RGB	rgb(31, 16, 125)
HSL	hsl(248, 77%, 28%)
HSV	hsv(248, 87%, 49%)
CMYK	cmyk(75.2%, 87.2%, 0%, 51%)
CIE-LAB	lab(16.22, 41.36, -57.34)
CIE-LCH	lch(16.22, 70.70, 305.80°)
OKLab	oklab(29.64% 0.0155 -0.1657)
OKLCH	oklch(29.64% 0.166 275.3)
XYZ	xyz(4.4508, 2.1421, 19.5770)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F107D #6E7D10

analogous

#10377D #1F107D #56107D

triadic

#1F107D #7D1F10 #107D1F

tetradic

#1F107D #7D1037 #6E7D10 #107D56

square

#1F107D #7D1037 #6E7D10 #107D56

split-complementary

#1F107D #7D5610 #377D10

monochromatic

#07031B #120947 #1F107D #2C17B3 #3F24E3

Accessibility & contrast

On white

14.70

#1F107D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1F107D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F107D

14.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F107D	#FFFFFF	#000000	##FFFFFF
##1F107D	1.00	14.70	1.43	14.70
#FFFFFF	14.70	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D80

Deuteranopia (green-blind)

#00237B

Tritanopia (blue-blind)

#003449

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1f107d;
/* rgb */ color: rgb(31, 16, 125);
/* oklch */ color: oklch(29.6% 0.166 275.3);

Tailwind

colors: {
  custom: {
    50: '#6c53a4',
    500: '#1f107d',
    950: '#000000',
  },
}

SCSS

$custom: #1f107d;
$custom-light: #6c53a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f107d",
  "rgb": {
    "r": 31,
    "g": 16,
    "b": 125
  },
  "hsl": {
    "h": 248.257,
    "s": 77.305,
    "l": 27.647
  },
  "oklch": {
    "l": 0.29635,
    "c": 0.16644,
    "h": 275.3
  },
  "luminance": 0.02143
}

Semantic roles & 50–950 ramp

primary

#1F107D

secondary

#A2B335

accent

#F434D9

background

#F7F4FA

surface

#EDE7F4

border

#C8C3CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F107D

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

Preview Lab → · Contrast checker → · Palette generator →