#1F36B4#1F36B4

#1F36B4 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 41.2% C 0.198 H 267.5°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#1F36B4
RGB	rgb(31, 54, 180)
HSL	hsl(231, 71%, 41%)
HSV	hsv(231, 83%, 71%)
CMYK	cmyk(82.8%, 70%, 0%, 29.4%)
CIE-LAB	lab(29.97, 38.83, -68.42)
CIE-LCH	lch(29.97, 78.68, 299.58°)
OKLab	oklab(41.19% -0.0086 -0.1983)
OKLCH	oklch(41.19% 0.198 267.5)
XYZ	xyz(10.1196, 6.2237, 43.8391)
Luminance	0.0622 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F36B4 #B49D1F

analogous

#1F81B4 #1F36B4 #531FB4

triadic

#1F36B4 #B41F36 #36B41F

tetradic

#1F36B4 #B41F81 #B49D1F #1FB453

square

#1F36B4 #B41F81 #B49D1F #1FB453

split-complementary

#1F36B4 #B4531F #81B41F

monochromatic

#0D174C #162680 #1F36B4 #344EDC #687CE5

Accessibility & contrast

On white

9.35

#1F36B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1F36B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F36B4

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F36B4	#FFFFFF	#000000	##FFFFFF
##1F36B4	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB8

Deuteranopia (green-blind)

#003FB2

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f36b4;
/* rgb */ color: rgb(31, 54, 180);
/* oklch */ color: oklch(41.2% 0.198 267.5);

Tailwind

colors: {
  custom: {
    50: '#776dcc',
    500: '#1f36b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f36b4;
$custom-light: #776dcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f36b4",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 180
  },
  "hsl": {
    "h": 230.738,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41192,
    "c": 0.19849,
    "h": 267.5
  },
  "luminance": 0.06225
}

Semantic roles & 50–950 ramp

primary

#1F36B4

secondary

#CBBB64

accent

#D23AED

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #1F36B4

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

Preview Lab → · Contrast checker → · Palette generator →