#1F138D#1F138D

#1F138D is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.9% C 0.183 H 273.1°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F138D
RGB	rgb(31, 19, 141)
HSL	hsl(246, 76%, 31%)
HSV	hsv(246, 87%, 55%)
CMYK	cmyk(78%, 86.5%, 0%, 44.7%)
CIE-LAB	lab(18.71, 44.99, -63.30)
CIE-LCH	lch(18.71, 77.66, 305.40°)
OKLab	oklab(31.94% 0.0098 -0.183)
OKLCH	oklch(31.94% 0.183 273.1)
XYZ	xyz(5.6041, 2.6795, 25.4160)
Luminance	0.0268 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F138D #818D13

analogous

#13448D #1F138D #5C138D

triadic

#1F138D #8D1F13 #138D1F

tetradic

#1F138D #8D1344 #818D13 #138D5C

square

#1F138D #8D1344 #818D13 #138D5C

split-complementary

#1F138D #8D5C13 #448D13

monochromatic

#070421 #130C57 #1F138D #2B1AC3 #4836E4

Accessibility & contrast

On white

13.67

#1F138D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1F138D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F138D

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F138D	#FFFFFF	#000000	##FFFFFF
##1F138D	1.00	13.67	1.54	13.67
#FFFFFF	13.67	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003390

Deuteranopia (green-blind)

#00288B

Tritanopia (blue-blind)

#003B53

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f138d;
/* rgb */ color: rgb(31, 19, 141);
/* oklch */ color: oklch(31.9% 0.183 273.1);

Tailwind

colors: {
  custom: {
    50: '#7056b0',
    500: '#1f138d',
    950: '#000000',
  },
}

SCSS

$custom: #1f138d;
$custom-light: #7056b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f138d",
  "rgb": {
    "r": 31,
    "g": 19,
    "b": 141
  },
  "hsl": {
    "h": 245.902,
    "s": 76.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.31936,
    "c": 0.1833,
    "h": 273.1
  },
  "luminance": 0.0268
}

Semantic roles & 50–950 ramp

primary

#1F138D

secondary

#B4C13B

accent

#F335E0

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1F138D

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

Preview Lab → · Contrast checker → · Palette generator →