#1F3EBC#1F3EBC

#1F3EBC is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.4% C 0.200 H 266.4°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F3EBC
RGB	rgb(31, 62, 188)
HSL	hsl(228, 72%, 43%)
HSV	hsv(228, 84%, 74%)
CMYK	cmyk(83.5%, 67%, 0%, 26.3%)
CIE-LAB	lab(32.63, 36.71, -68.79)
CIE-LCH	lch(32.63, 77.97, 298.09°)
OKLab	oklab(43.36% -0.0125 -0.1993)
OKLCH	oklch(43.36% 0.2 266.4)
XYZ	xyz(11.3616, 7.3660, 48.3902)
Luminance	0.0737 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.21

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3EBC #BC9D1F

analogous

#1F8CBC #1F3EBC #4F1FBC

triadic

#1F3EBC #BC1F3E #3EBC1F

tetradic

#1F3EBC #BC1F8C #BC9D1F #1FBC4F

square

#1F3EBC #BC1F8C #BC9D1F #1FBC4F

split-complementary

#1F3EBC #BC4F1F #8CBC1F

monochromatic

#0E1B53 #162D87 #1F3EBC #3A5ADE #6E86E7

Accessibility & contrast

On white

8.49

#1F3EBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#1F3EBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3EBC

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3EBC	#FFFFFF	#000000	##FFFFFF
##1F3EBC	1.00	8.49	2.47	8.49
#FFFFFF	8.49	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C0

Deuteranopia (green-blind)

#0045BA

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f3ebc;
/* rgb */ color: rgb(31, 62, 188);
/* oklch */ color: oklch(43.4% 0.200 266.4);

Tailwind

colors: {
  custom: {
    50: '#7873d1',
    500: '#1f3ebc',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ebc;
$custom-light: #7873d1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ebc",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 188
  },
  "hsl": {
    "h": 228.153,
    "s": 71.689,
    "l": 42.941
  },
  "oklch": {
    "l": 0.4336,
    "c": 0.19972,
    "h": 266.4
  },
  "luminance": 0.07367
}

Semantic roles & 50–950 ramp

primary

#1F3EBC

secondary

#CDBA69

accent

#CB39EE

background

#F8F7FD

surface

#EFEDFA

border

#CAC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #1F3EBC

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

Preview Lab → · Contrast checker → · Palette generator →