#1F259D#1F259D

#1F259D is a dark, vivid blue. Relative luminance 0.040; OKLCH L 36.1% C 0.187 H 270.2°. Best body text is #FFFFFF at 11.60:1 contrast (WCAG AA passes).

Color values

HEX	#1F259D
RGB	rgb(31, 37, 157)
HSL	hsl(237, 67%, 37%)
HSV	hsv(237, 80%, 62%)
CMYK	cmyk(80.3%, 76.4%, 0%, 38.4%)
CIE-LAB	lab(23.83, 40.96, -64.70)
CIE-LCH	lch(23.83, 76.57, 302.34°)
OKLab	oklab(36.07% 0.0007 -0.1874)
OKLCH	oklch(36.07% 0.187 270.2)
XYZ	xyz(7.3104, 4.0479, 32.2878)
Luminance	0.0405 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F259D #9D971F

analogous

#1F649D #1F259D #581F9D

triadic

#1F259D #9D1F25 #259D1F

tetradic

#1F259D #9D1F64 #9D971F #1F9D58

square

#1F259D #9D1F64 #9D971F #1F9D58

split-complementary

#1F259D #9D581F #649D1F

monochromatic

#0B0D37 #15196A #1F259D #2931D0 #585FDE

Accessibility & contrast

On white

11.60

#1F259D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1F259D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F259D

11.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F259D	#FFFFFF	#000000	##FFFFFF
##1F259D	1.00	11.60	1.81	11.60
#FFFFFF	11.60	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FA0

Deuteranopia (green-blind)

#00329B

Tritanopia (blue-blind)

#00495F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f259d;
/* rgb */ color: rgb(31, 37, 157);
/* oklch */ color: oklch(36.1% 0.187 270.2);

Tailwind

colors: {
  custom: {
    50: '#7361bb',
    500: '#1f259d',
    950: '#000000',
  },
}

SCSS

$custom: #1f259d;
$custom-light: #7361bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f259d",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 157
  },
  "hsl": {
    "h": 237.143,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.36065,
    "c": 0.18739,
    "h": 270.2
  },
  "luminance": 0.04049
}

Semantic roles & 50–950 ramp

primary

#1F259D

secondary

#C2BD56

accent

#E23EEA

background

#F7F5FB

surface

#EEEAF6

border

#C9C6D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #1F259D

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

Preview Lab → · Contrast checker → · Palette generator →