#1F239D#1F239D

#1F239D is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.8% C 0.189 H 270.4°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#1F239D
RGB	rgb(31, 35, 157)
HSL	hsl(238, 67%, 37%)
HSV	hsv(238, 80%, 62%)
CMYK	cmyk(80.3%, 77.7%, 0%, 38.4%)
CIE-LAB	lab(23.43, 42.10, -65.36)
CIE-LCH	lch(23.43, 77.75, 302.78°)
OKLab	oklab(35.78% 0.0014 -0.1893)
OKLCH	oklch(35.78% 0.189 270.4)
XYZ	xyz(7.2498, 3.9269, 32.2676)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F239D #9D991F

analogous

#1F629D #1F239D #5A1F9D

triadic

#1F239D #9D1F23 #239D1F

tetradic

#1F239D #9D1F62 #9D991F #1F9D5A

square

#1F239D #9D1F62 #9D991F #1F9D5A

split-complementary

#1F239D #9D5A1F #629D1F

monochromatic

#0B0C37 #15186A #1F239D #292ED0 #585DDE

Accessibility & contrast

On white

11.76

#1F239D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1F239D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F239D

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F239D	#FFFFFF	#000000	##FFFFFF
##1F239D	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA0

Deuteranopia (green-blind)

#00319B

Tritanopia (blue-blind)

#00485F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f239d;
/* rgb */ color: rgb(31, 35, 157);
/* oklch */ color: oklch(35.8% 0.189 270.4);

Tailwind

colors: {
  custom: {
    50: '#7360bb',
    500: '#1f239d',
    950: '#000000',
  },
}

SCSS

$custom: #1f239d;
$custom-light: #7360bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f239d",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 157
  },
  "hsl": {
    "h": 238.095,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.35782,
    "c": 0.1893,
    "h": 270.4
  },
  "luminance": 0.03928
}

Semantic roles & 50–950 ramp

primary

#1F239D

secondary

#C2BE56

accent

#E43EEA

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #1F239D

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

Preview Lab → · Contrast checker → · Palette generator →