#1F259A#1F259A

#1F259A is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.7% C 0.184 H 270.4°. Best body text is #FFFFFF at 11.73:1 contrast (WCAG AA passes).

Color values

HEX	#1F259A
RGB	rgb(31, 37, 154)
HSL	hsl(237, 66%, 36%)
HSV	hsv(237, 80%, 60%)
CMYK	cmyk(79.9%, 76%, 0%, 39.6%)
CIE-LAB	lab(23.49, 39.92, -63.42)
CIE-LCH	lch(23.49, 74.93, 302.19°)
OKLab	oklab(35.73% 0.0012 -0.1837)
OKLCH	oklch(35.73% 0.184 270.4)
XYZ	xyz(7.0574, 3.9467, 30.9554)
Luminance	0.0395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F259A #9A941F

analogous

#1F639A #1F259A #571F9A

triadic

#1F259A #9A1F25 #259A1F

tetradic

#1F259A #9A1F63 #9A941F #1F9A57

square

#1F259A #9A1F63 #9A941F #1F9A57

split-complementary

#1F259A #9A571F #639A1F

monochromatic

#0A0D34 #151967 #1F259A #2931CD #565DDD

Accessibility & contrast

On white

11.73

#1F259A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1F259A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F259A

11.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F259A	#FFFFFF	#000000	##FFFFFF
##1F259A	1.00	11.73	1.79	11.73
#FFFFFF	11.73	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E9D

Deuteranopia (green-blind)

#003298

Tritanopia (blue-blind)

#00475E

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f259a;
/* rgb */ color: rgb(31, 37, 154);
/* oklch */ color: oklch(35.7% 0.184 270.4);

Tailwind

colors: {
  custom: {
    50: '#7261b9',
    500: '#1f259a',
    950: '#000000',
  },
}

SCSS

$custom: #1f259a;
$custom-light: #7261b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f259a",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 154
  },
  "hsl": {
    "h": 237.073,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.35729,
    "c": 0.18366,
    "h": 270.4
  },
  "luminance": 0.03948
}

Semantic roles & 50–950 ramp

primary

#1F259A

secondary

#C1BB54

accent

#E13EE9

background

#F7F5FB

surface

#EEEAF6

border

#C9C6D0

text

#090512

muted

#7B7981

Preview Lab

Preview with #1F259A

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

Preview Lab → · Contrast checker → · Palette generator →