#1F156F#1F156F

#1F156F is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.5% C 0.145 H 277.0°. Best body text is #FFFFFF at 15.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F156F
RGB	rgb(31, 21, 111)
HSL	hsl(247, 68%, 26%)
HSV	hsv(247, 81%, 44%)
CMYK	cmyk(72.1%, 81.1%, 0%, 56.5%)
CIE-LAB	lab(15.36, 34.33, -49.74)
CIE-LCH	lch(15.36, 60.43, 304.61°)
OKLab	oklab(28.54% 0.0176 -0.1437)
OKLCH	oklch(28.54% 0.145 277)
XYZ	xyz(3.7015, 1.9750, 15.2220)
Luminance	0.0198 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F156F #656F15

analogous

#15386F #1F156F #4C156F

triadic

#1F156F #6F1F15 #156F1F

tetradic

#1F156F #6F1538 #656F15 #156F4C

square

#1F156F #6F1538 #656F15 #156F4C

split-complementary

#1F156F #6F4C15 #386F15

monochromatic

#07051A #110B3C #1F156F #2D1FA2 #3C28D6

Accessibility & contrast

On white

15.05

#1F156F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#1F156F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F156F

15.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F156F	#FFFFFF	#000000	##FFFFFF
##1F156F	1.00	15.05	1.40	15.05
#FFFFFF	15.05	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A72

Deuteranopia (green-blind)

#00236D

Tritanopia (blue-blind)

#003041

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1f156f;
/* rgb */ color: rgb(31, 21, 111);
/* oklch */ color: oklch(28.5% 0.145 277.0);

Tailwind

colors: {
  custom: {
    50: '#685599',
    500: '#1f156f',
    950: '#000000',
  },
}

SCSS

$custom: #1f156f;
$custom-light: #685599;
$custom-dark: #000000;

JSON

{
  "hex": "#1f156f",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 111
  },
  "hsl": {
    "h": 246.667,
    "s": 68.182,
    "l": 25.882
  },
  "oklch": {
    "l": 0.28539,
    "c": 0.14481,
    "h": 277
  },
  "luminance": 0.01975
}

Semantic roles & 50–950 ramp

primary

#1F156F

secondary

#99A53A

accent

#EB3DD8

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1F156F

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

Preview Lab → · Contrast checker → · Palette generator →