#1F155B#1F155B

#1F155B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.3% C 0.118 H 281.0°. Best body text is #FFFFFF at 15.95:1 contrast (WCAG AA passes).

Color values

HEX	#1F155B
RGB	rgb(31, 21, 91)
HSL	hsl(249, 63%, 22%)
HSV	hsv(249, 77%, 36%)
CMYK	cmyk(65.9%, 76.9%, 0%, 64.3%)
CIE-LAB	lab(13.13, 27.42, -40.19)
CIE-LCH	lch(13.13, 48.65, 304.30°)
OKLab	oklab(26.3% 0.0226 -0.1159)
OKLCH	oklch(26.3% 0.118 281)
XYZ	xyz(2.7210, 1.5828, 10.0576)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F155B #515B15

analogous

#152E5B #1F155B #42155B

triadic

#1F155B #5B1F15 #155B1F

tetradic

#1F155B #5B152E #515B15 #155B42

square

#1F155B #5B152E #515B15 #155B42

split-complementary

#1F155B #5B4215 #2E5B15

monochromatic

#080619 #0E0A29 #1F155B #30208D #412CBE

Accessibility & contrast

On white

15.95

#1F155B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#1F155B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F155B

15.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F155B	#FFFFFF	#000000	##FFFFFF
##1F155B	1.00	15.95	1.32	15.95
#FFFFFF	15.95	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00245D

Deuteranopia (green-blind)

#001F5A

Tritanopia (blue-blind)

#002836

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #1f155b;
/* rgb */ color: rgb(31, 21, 91);
/* oklch */ color: oklch(26.3% 0.118 281.0);

Tailwind

colors: {
  custom: {
    50: '#63538a',
    500: '#1f155b',
    950: '#000000',
  },
}

SCSS

$custom: #1f155b;
$custom-light: #63538a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f155b",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 91
  },
  "hsl": {
    "h": 248.571,
    "s": 62.5,
    "l": 21.961
  },
  "oklch": {
    "l": 0.26296,
    "c": 0.11807,
    "h": 281
  },
  "luminance": 0.01583
}

Semantic roles & 50–950 ramp

primary

#1F155B

secondary

#869239

accent

#E642CE

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1F155B

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

Preview Lab → · Contrast checker → · Palette generator →