#1F148B#1F148B

#1F148B is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.8% C 0.180 H 273.2°. Best body text is #FFFFFF at 13.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F148B
RGB	rgb(31, 20, 139)
HSL	hsl(246, 75%, 31%)
HSV	hsv(246, 86%, 55%)
CMYK	cmyk(77.7%, 85.6%, 0%, 45.5%)
CIE-LAB	lab(18.61, 43.92, -62.22)
CIE-LCH	lch(18.61, 76.16, 305.22°)
OKLab	oklab(31.79% 0.0101 -0.1799)
OKLCH	oklch(31.79% 0.18 273.2)
XYZ	xyz(5.4739, 2.6551, 24.6451)
Luminance	0.0266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F148B #808B14

analogous

#14448B #1F148B #5A148B

triadic

#1F148B #8B1F14 #148B1F

tetradic

#1F148B #8B1444 #808B14 #148B5A

square

#1F148B #8B1444 #808B14 #148B5A

split-complementary

#1F148B #8B5A14 #448B14

monochromatic

#070520 #130C55 #1F148B #2B1CC1 #4737E2

Accessibility & contrast

On white

13.71

#1F148B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1F148B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F148B

13.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F148B	#FFFFFF	#000000	##FFFFFF
##1F148B	1.00	13.71	1.53	13.71
#FFFFFF	13.71	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338E

Deuteranopia (green-blind)

#002889

Tritanopia (blue-blind)

#003B52

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f148b;
/* rgb */ color: rgb(31, 20, 139);
/* oklch */ color: oklch(31.8% 0.180 273.2);

Tailwind

colors: {
  custom: {
    50: '#7056ae',
    500: '#1f148b',
    950: '#000000',
  },
}

SCSS

$custom: #1f148b;
$custom-light: #7056ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f148b",
  "rgb": {
    "r": 31,
    "g": 20,
    "b": 139
  },
  "hsl": {
    "h": 245.546,
    "s": 74.843,
    "l": 31.176
  },
  "oklch": {
    "l": 0.3179,
    "c": 0.18023,
    "h": 273.2
  },
  "luminance": 0.02656
}

Semantic roles & 50–950 ramp

primary

#1F148B

secondary

#B3BF3C

accent

#F136E0

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090310

muted

#7B787F

Preview Lab

Preview with #1F148B

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

Preview Lab → · Contrast checker → · Palette generator →