#1F3D9B#1F3D9B

#1F3D9B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.157 H 265.9°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D9B
RGB	rgb(31, 61, 155)
HSL	hsl(225, 67%, 36%)
HSV	hsv(225, 80%, 61%)
CMYK	cmyk(80%, 60.6%, 0%, 39.2%)
CIE-LAB	lab(29.40, 24.78, -54.33)
CIE-LCH	lch(29.40, 59.71, 294.52°)
OKLab	oklab(40.07% -0.0114 -0.157)
OKLCH	oklch(40.07% 0.157 265.9)
XYZ	xyz(8.1481, 5.9944, 31.7316)
Luminance	0.0600 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D9B #9B7D1F

analogous

#1F7B9B #1F3D9B #3F1F9B

triadic

#1F3D9B #9B1F3D #3D9B1F

tetradic

#1F3D9B #9B1F7B #9B7D1F #1F9B3F

square

#1F3D9B #9B1F7B #9B7D1F #1F9B3F

split-complementary

#1F3D9B #9B3F1F #7B9B1F

monochromatic

#0B1535 #152968 #1F3D9B #2951CE #5778DD

Accessibility & contrast

On white

9.55

#1F3D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1F3D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D9B

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D9B	#FFFFFF	#000000	##FFFFFF
##1F3D9B	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f3d9b;
/* rgb */ color: rgb(31, 61, 155);
/* oklch */ color: oklch(40.1% 0.157 265.9);

Tailwind

colors: {
  custom: {
    50: '#7072b9',
    500: '#1f3d9b',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d9b;
$custom-light: #7072b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d9b",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 155
  },
  "hsl": {
    "h": 225.484,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.40065,
    "c": 0.15743,
    "h": 265.9
  },
  "luminance": 0.05995
}

Semantic roles & 50–950 ramp

primary

#1F3D9B

secondary

#C1A755

accent

#C03EEA

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3D9B

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

Preview Lab → · Contrast checker → · Palette generator →