#1F156C#1F156C

#1F156C is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.2% C 0.141 H 277.5°. Best body text is #FFFFFF at 15.20:1 contrast (WCAG AA passes).

Color values

HEX	#1F156C
RGB	rgb(31, 21, 108)
HSL	hsl(247, 67%, 25%)
HSV	hsv(247, 81%, 42%)
CMYK	cmyk(71.3%, 80.6%, 0%, 57.6%)
CIE-LAB	lab(15.01, 33.31, -48.36)
CIE-LCH	lch(15.01, 58.72, 304.56°)
OKLab	oklab(28.19% 0.0184 -0.1397)
OKLCH	oklch(28.19% 0.141 277.5)
XYZ	xyz(3.5391, 1.9100, 14.3666)
Luminance	0.0191 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F156C #626C15

analogous

#15366C #1F156C #4B156C

triadic

#1F156C #6C1F15 #156C1F

tetradic

#1F156C #6C1536 #626C15 #156C4B

square

#1F156C #6C1536 #626C15 #156C4B

split-complementary

#1F156C #6C4B15 #366C15

monochromatic

#07051A #100B39 #1F156C #2E1F9F #3C29D2

Accessibility & contrast

On white

15.20

#1F156C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#1F156C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F156C

15.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F156C	#FFFFFF	#000000	##FFFFFF
##1F156C	1.00	15.20	1.38	15.20
#FFFFFF	15.20	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296E

Deuteranopia (green-blind)

#00226A

Tritanopia (blue-blind)

#002F40

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1f156c;
/* rgb */ color: rgb(31, 21, 108);
/* oklch */ color: oklch(28.2% 0.141 277.5);

Tailwind

colors: {
  custom: {
    50: '#685497',
    500: '#1f156c',
    950: '#000000',
  },
}

SCSS

$custom: #1f156c;
$custom-light: #685497;
$custom-dark: #000000;

JSON

{
  "hex": "#1f156c",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 108
  },
  "hsl": {
    "h": 246.897,
    "s": 67.442,
    "l": 25.294
  },
  "oklch": {
    "l": 0.28192,
    "c": 0.14092,
    "h": 277.5
  },
  "luminance": 0.0191
}

Semantic roles & 50–950 ramp

primary

#1F156C

secondary

#97A33A

accent

#EA3DD6

background

#F6F5F9

surface

#EBE8F2

border

#C6C4CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1F156C

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

Preview Lab → · Contrast checker → · Palette generator →