#1F158A#1F158A

#1F158A is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.8% C 0.178 H 273.2°. Best body text is #FFFFFF at 13.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F158A
RGB	rgb(31, 21, 138)
HSL	hsl(245, 74%, 31%)
HSV	hsv(245, 85%, 54%)
CMYK	cmyk(77.5%, 84.8%, 0%, 45.9%)
CIE-LAB	lab(18.64, 43.15, -61.54)
CIE-LCH	lch(18.64, 75.16, 305.04°)
OKLab	oklab(31.78% 0.0101 -0.178)
OKLCH	oklch(31.78% 0.178 273.2)
XYZ	xyz(5.4192, 2.6620, 24.2681)
Luminance	0.0266 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F158A #808A15

analogous

#15458A #1F158A #59158A

triadic

#1F158A #8A1F15 #158A1F

tetradic

#1F158A #8A1545 #808A15 #158A59

square

#1F158A #8A1545 #808A15 #158A59

split-complementary

#1F158A #8A5915 #458A15

monochromatic

#070520 #130D55 #1F158A #2B1DBF #4739E1

Accessibility & contrast

On white

13.70

#1F158A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1F158A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F158A

13.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F158A	#FFFFFF	#000000	##FFFFFF
##1F158A	1.00	13.70	1.53	13.70
#FFFFFF	13.70	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338D

Deuteranopia (green-blind)

#002888

Tritanopia (blue-blind)

#003B51

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f158a;
/* rgb */ color: rgb(31, 21, 138);
/* oklch */ color: oklch(31.8% 0.178 273.2);

Tailwind

colors: {
  custom: {
    50: '#6f57ad',
    500: '#1f158a',
    950: '#000000',
  },
}

SCSS

$custom: #1f158a;
$custom-light: #6f57ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f158a",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 138
  },
  "hsl": {
    "h": 245.128,
    "s": 73.585,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31775,
    "c": 0.1783,
    "h": 273.2
  },
  "luminance": 0.02663
}

Semantic roles & 50–950 ramp

primary

#1F158A

secondary

#B3BE3D

accent

#F038E0

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1F158A

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

Preview Lab → · Contrast checker → · Palette generator →