#1F36A5#1F36A5

#1F36A5 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.7% C 0.179 H 267.6°. Best body text is #FFFFFF at 9.86:1 contrast (WCAG AA passes).

Color values

HEX	#1F36A5
RGB	rgb(31, 54, 165)
HSL	hsl(230, 68%, 38%)
HSV	hsv(230, 81%, 65%)
CMYK	cmyk(81.2%, 67.3%, 0%, 35.3%)
CIE-LAB	lab(28.50, 33.30, -61.86)
CIE-LCH	lch(28.50, 70.25, 298.29°)
OKLab	oklab(39.68% -0.0075 -0.1791)
OKLCH	oklch(39.68% 0.179 267.6)
XYZ	xyz(8.6734, 5.6452, 36.2225)
Luminance	0.0565 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F36A5 #A58E1F

analogous

#1F79A5 #1F36A5 #4B1FA5

triadic

#1F36A5 #A51F36 #36A51F

tetradic

#1F36A5 #A51F79 #A58E1F #1FA54B

square

#1F36A5 #A51F79 #A58E1F #1FA54B

split-complementary

#1F36A5 #A54B1F #79A51F

monochromatic

#0C143E #152571 #1F36A5 #2A48D7 #5E74E1

Accessibility & contrast

On white

9.86

#1F36A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1F36A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F36A5

9.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F36A5	#FFFFFF	#000000	##FFFFFF
##1F36A5	1.00	9.86	2.13	9.86
#FFFFFF	9.86	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA8

Deuteranopia (green-blind)

#003DA3

Tritanopia (blue-blind)

#005469

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f36a5;
/* rgb */ color: rgb(31, 54, 165);
/* oklch */ color: oklch(39.7% 0.179 267.6);

Tailwind

colors: {
  custom: {
    50: '#736dc1',
    500: '#1f36a5',
    950: '#000000',
  },
}

SCSS

$custom: #1f36a5;
$custom-light: #736dc1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f36a5",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 165
  },
  "hsl": {
    "h": 229.701,
    "s": 68.367,
    "l": 38.431
  },
  "oklch": {
    "l": 0.39678,
    "c": 0.17931,
    "h": 267.6
  },
  "luminance": 0.05646
}

Semantic roles & 50–950 ramp

primary

#1F36A5

secondary

#C5B35B

accent

#CD3DEB

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #1F36A5

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

Preview Lab → · Contrast checker → · Palette generator →