#1F408B#1F408B

#1F408B is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.3% C 0.131 H 263.6°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F408B
RGB	rgb(31, 64, 139)
HSL	hsl(222, 64%, 33%)
HSV	hsv(222, 78%, 55%)
CMYK	cmyk(77.7%, 54%, 0%, 45.5%)
CIE-LAB	lab(28.96, 16.37, -45.24)
CIE-LCH	lch(28.96, 48.11, 289.89°)
OKLab	oklab(39.33% -0.0146 -0.1303)
OKLCH	oklch(39.33% 0.131 263.6)
XYZ	xyz(7.0570, 5.8214, 25.1728)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F408B #8B6A1F

analogous

#1F768B #1F408B #341F8B

triadic

#1F408B #8B1F40 #408B1F

tetradic

#1F408B #8B1F76 #8B6A1F #1F8B34

square

#1F408B #8B1F76 #8B6A1F #1F8B34

split-complementary

#1F408B #8B341F #768B1F

monochromatic

#091227 #142959 #1F408B #2A57BD #4D77D7

Accessibility & contrast

On white

9.70

#1F408B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1F408B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F408B

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F408B	#FFFFFF	#000000	##FFFFFF
##1F408B	1.00	9.70	2.16	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A498E

Deuteranopia (green-blind)

#00408A

Tritanopia (blue-blind)

#00525F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f408b;
/* rgb */ color: rgb(31, 64, 139);
/* oklch */ color: oklch(39.3% 0.131 263.6);

Tailwind

colors: {
  custom: {
    50: '#6c74ad',
    500: '#1f408b',
    950: '#000000',
  },
}

SCSS

$custom: #1f408b;
$custom-light: #6c74ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f408b",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 139
  },
  "hsl": {
    "h": 221.667,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.39331,
    "c": 0.13107,
    "h": 263.6
  },
  "luminance": 0.05822
}

Semantic roles & 50–950 ramp

primary

#1F408B

secondary

#BA984C

accent

#B441E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F408B

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

Preview Lab → · Contrast checker → · Palette generator →