#1F3397#1F3397

#1F3397 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.8% C 0.164 H 268.2°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#1F3397
RGB	rgb(31, 51, 151)
HSL	hsl(230, 66%, 36%)
HSV	hsv(230, 79%, 59%)
CMYK	cmyk(79.5%, 66.2%, 0%, 40.8%)
CIE-LAB	lab(26.43, 29.98, -56.75)
CIE-LCH	lch(26.43, 64.18, 297.85°)
OKLab	oklab(37.76% -0.0052 -0.1642)
OKLCH	oklch(37.76% 0.164 268.2)
XYZ	xyz(7.3329, 4.8925, 29.8300)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3397 #97831F

analogous

#1F6F97 #1F3397 #471F97

triadic

#1F3397 #971F33 #33971F

tetradic

#1F3397 #971F6F #97831F #1F9747

square

#1F3397 #971F6F #97831F #1F9747

split-complementary

#1F3397 #97471F #6F971F

monochromatic

#0A1131 #152264 #1F3397 #2944CA #546BDC

Accessibility & contrast

On white

10.61

#1F3397 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1F3397 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3397

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3397	#FFFFFF	#000000	##FFFFFF
##1F3397	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00449A

Deuteranopia (green-blind)

#003995

Tritanopia (blue-blind)

#004E60

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3397;
/* rgb */ color: rgb(31, 51, 151);
/* oklch */ color: oklch(37.8% 0.164 268.2);

Tailwind

colors: {
  custom: {
    50: '#706ab7',
    500: '#1f3397',
    950: '#000000',
  },
}

SCSS

$custom: #1f3397;
$custom-light: #706ab7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3397",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 151
  },
  "hsl": {
    "h": 230,
    "s": 65.934,
    "l": 35.686
  },
  "oklch": {
    "l": 0.37755,
    "c": 0.16431,
    "h": 268.2
  },
  "luminance": 0.04893
}

Semantic roles & 50–950 ramp

primary

#1F3397

secondary

#BFAD52

accent

#CD3FE9

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #1F3397

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

Preview Lab → · Contrast checker → · Palette generator →