#1F318D#1F318D

#1F318D is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.4% C 0.153 H 268.7°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#1F318D
RGB	rgb(31, 49, 141)
HSL	hsl(230, 64%, 34%)
HSV	hsv(230, 78%, 55%)
CMYK	cmyk(78%, 65.2%, 0%, 44.7%)
CIE-LAB	lab(24.98, 27.49, -52.95)
CIE-LCH	lch(24.98, 59.66, 297.44°)
OKLab	oklab(36.41% -0.0035 -0.1531)
OKLCH	oklch(36.41% 0.153 268.7)
XYZ	xyz(6.4694, 4.4103, 25.7045)
Luminance	0.0441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F318D #8D7B1F

analogous

#1F688D #1F318D #441F8D

triadic

#1F318D #8D1F31 #318D1F

tetradic

#1F318D #8D1F68 #8D7B1F #1F8D44

square

#1F318D #8D1F68 #8D7B1F #1F8D44

split-complementary

#1F318D #8D441F #688D1F

monochromatic

#090E29 #14205B #1F318D #2A42BF #4E65D8

Accessibility & contrast

On white

11.16

#1F318D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1F318D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F318D

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F318D	#FFFFFF	#000000	##FFFFFF
##1F318D	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004190

Deuteranopia (green-blind)

#00368B

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f318d;
/* rgb */ color: rgb(31, 49, 141);
/* oklch */ color: oklch(36.4% 0.153 268.7);

Tailwind

colors: {
  custom: {
    50: '#6d69af',
    500: '#1f318d',
    950: '#000000',
  },
}

SCSS

$custom: #1f318d;
$custom-light: #6d69af;
$custom-dark: #000000;

JSON

{
  "hex": "#1f318d",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 141
  },
  "hsl": {
    "h": 230.182,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.36409,
    "c": 0.15316,
    "h": 268.7
  },
  "luminance": 0.04411
}

Semantic roles & 50–950 ramp

primary

#1F318D

secondary

#BBA94D

accent

#CC41E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F318D

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

Preview Lab → · Contrast checker → · Palette generator →