#1F155E#1F155E

#1F155E is a dark, vivid blue. Relative luminance 0.016; OKLCH L 26.6% C 0.122 H 280.3°. Best body text is #FFFFFF at 15.82:1 contrast (WCAG AA passes).

Color values

HEX	#1F155E
RGB	rgb(31, 21, 94)
HSL	hsl(248, 63%, 23%)
HSV	hsv(248, 78%, 37%)
CMYK	cmyk(67%, 77.7%, 0%, 63.1%)
CIE-LAB	lab(13.45, 28.47, -41.68)
CIE-LCH	lch(13.45, 50.47, 304.34°)
OKLab	oklab(26.62% 0.0219 -0.1202)
OKLCH	oklch(26.62% 0.122 280.3)
XYZ	xyz(2.8530, 1.6356, 10.7529)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F155E #545E15

analogous

#15305E #1F155E #43155E

triadic

#1F155E #5E1F15 #155E1F

tetradic

#1F155E #5E1530 #545E15 #155E43

square

#1F155E #5E1530 #545E15 #155E43

split-complementary

#1F155E #5E4315 #305E15

monochromatic

#080619 #0F0A2C #1F155E #2F2090 #402BC2

Accessibility & contrast

On white

15.82

#1F155E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#1F155E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F155E

15.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F155E	#FFFFFF	#000000	##FFFFFF
##1F155E	1.00	15.82	1.33	15.82
#FFFFFF	15.82	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002560

Deuteranopia (green-blind)

#00205D

Tritanopia (blue-blind)

#002938

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #1f155e;
/* rgb */ color: rgb(31, 21, 94);
/* oklch */ color: oklch(26.6% 0.122 280.3);

Tailwind

colors: {
  custom: {
    50: '#64548c',
    500: '#1f155e',
    950: '#000000',
  },
}

SCSS

$custom: #1f155e;
$custom-light: #64548c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f155e",
  "rgb": {
    "r": 31,
    "g": 21,
    "b": 94
  },
  "hsl": {
    "h": 248.219,
    "s": 63.478,
    "l": 22.549
  },
  "oklch": {
    "l": 0.26621,
    "c": 0.12221,
    "h": 280.3
  },
  "luminance": 0.01636
}

Semantic roles & 50–950 ramp

primary

#1F155E

secondary

#899539

accent

#E741D0

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #1F155E

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

Preview Lab → · Contrast checker → · Palette generator →