#1F236E#1F236E

#1F236E is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.7% C 0.127 H 273.7°. Best body text is #FFFFFF at 13.78:1 contrast (WCAG AA passes).

Color values

HEX	#1F236E
RGB	rgb(31, 35, 110)
HSL	hsl(237, 56%, 28%)
HSV	hsv(237, 72%, 43%)
CMYK	cmyk(71.8%, 68.2%, 0%, 56.9%)
CIE-LAB	lab(18.45, 25.14, -44.00)
CIE-LCH	lch(18.45, 50.68, 299.74°)
OKLab	oklab(30.72% 0.0083 -0.127)
OKLCH	oklch(30.72% 0.127 273.7)
XYZ	xyz(3.9796, 2.6188, 15.0446)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F236E #6E6A1F

analogous

#1F4A6E #1F236E #421F6E

triadic

#1F236E #6E1F23 #236E1F

tetradic

#1F236E #6E1F4A #6E6A1F #1F6E42

square

#1F236E #6E1F4A #6E6A1F #1F6E42

split-complementary

#1F236E #6E421F #4A6E1F

monochromatic

#070818 #12143E #1F236E #2C329E #3F46C9

Accessibility & contrast

On white

13.78

#1F236E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1F236E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F236E

13.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F236E	#FFFFFF	#000000	##FFFFFF
##1F236E	1.00	13.78	1.52	13.78
#FFFFFF	13.78	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003170

Deuteranopia (green-blind)

#00296D

Tritanopia (blue-blind)

#003745

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f236e;
/* rgb */ color: rgb(31, 35, 110);
/* oklch */ color: oklch(30.7% 0.127 273.7);

Tailwind

colors: {
  custom: {
    50: '#675e98',
    500: '#1f236e',
    950: '#000000',
  },
}

SCSS

$custom: #1f236e;
$custom-light: #675e98;
$custom-dark: #000000;

JSON

{
  "hex": "#1f236e",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 110
  },
  "hsl": {
    "h": 236.962,
    "s": 56.028,
    "l": 27.647
  },
  "oklch": {
    "l": 0.30721,
    "c": 0.12731,
    "h": 273.7
  },
  "luminance": 0.02619
}

Semantic roles & 50–950 ramp

primary

#1F236E

secondary

#A29D47

accent

#D848DF

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F236E

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

Preview Lab → · Contrast checker → · Palette generator →