#1F156D#1F156D

#1F156D is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.3% C 0.142 H 277.3°. Best body text is #FFFFFF at 15.15:1 contrast (WCAG AA passes).

Color values

HEX	#1F156D
RGB	rgb(31, 21, 109)
HSL	hsl(247, 68%, 25%)
HSV	hsv(247, 81%, 43%)
CMYK	cmyk(71.6%, 80.7%, 0%, 57.3%)
CIE-LAB	lab(15.12, 33.65, -48.82)
CIE-LCH	lch(15.12, 59.29, 304.58°)
OKLab	oklab(28.31% 0.0181 -0.1411)
OKLCH	oklch(28.31% 0.142 277.3)
XYZ	xyz(3.5927, 1.9314, 14.6485)
Luminance	0.0193 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F156D #636D15

analogous

#15376D #1F156D #4B156D

triadic

#1F156D #6D1F15 #156D1F

tetradic

#1F156D #6D1537 #636D15 #156D4B

square

#1F156D #6D1537 #636D15 #156D4B

split-complementary

#1F156D #6D4B15 #376D15

monochromatic

#07051A #100B3A #1F156D #2E1FA0 #3C29D4

Accessibility & contrast

On white

15.15

#1F156D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#1F156D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F156D

15.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F156D	#FFFFFF	#000000	##FFFFFF
##1F156D	1.00	15.15	1.39	15.15
#FFFFFF	15.15	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296F

Deuteranopia (green-blind)

#00226B

Tritanopia (blue-blind)

#002F40

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1f156d;
/* rgb */ color: rgb(31, 21, 109);
/* oklch */ color: oklch(28.3% 0.142 277.3);

Tailwind

colors: {
  custom: {
    50: '#685498',
    500: '#1f156d',
    950: '#000000',
  },
}

SCSS

$custom: #1f156d;
$custom-light: #685498;
$custom-dark: #000000;

JSON

{
  "hex": "#1f156d",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 109
  },
  "hsl": {
    "h": 246.818,
    "s": 67.692,
    "l": 25.49
  },
  "oklch": {
    "l": 0.28307,
    "c": 0.14222,
    "h": 277.3
  },
  "luminance": 0.01932
}

Semantic roles & 50–950 ramp

primary

#1F156D

secondary

#98A33A

accent

#EB3DD7

background

#F6F5F9

surface

#EBE8F2

border

#C6C4CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1F156D

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

Preview Lab → · Contrast checker → · Palette generator →