#1F3D7B#1F3D7B

#1F3D7B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.112 H 262.8°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D7B
RGB	rgb(31, 61, 123)
HSL	hsl(220, 60%, 30%)
HSV	hsv(220, 75%, 48%)
CMYK	cmyk(74.8%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(26.90, 12.02, -38.59)
CIE-LCH	lch(26.90, 40.42, 287.31°)
OKLab	oklab(37.39% -0.014 -0.1107)
OKLCH	oklch(37.39% 0.112 262.8)
XYZ	xyz(5.8077, 5.0582, 19.4053)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D7B #7B5D1F

analogous

#1F6B7B #1F3D7B #2F1F7B

triadic

#1F3D7B #7B1F3D #3D7B1F

tetradic

#1F3D7B #7B1F6B #7B5D1F #1F7B2F

square

#1F3D7B #7B1F6B #7B5D1F #1F7B2F

split-complementary

#1F3D7B #7B2F1F #6B7B1F

monochromatic

#060D19 #13254A #1F3D7B #2B55AC #4472D0

Accessibility & contrast

On white

10.44

#1F3D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1F3D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D7B

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D7B	#FFFFFF	#000000	##FFFFFF
##1F3D7B	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A447D

Deuteranopia (green-blind)

#003C7A

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3d7b;
/* rgb */ color: rgb(31, 61, 123);
/* oklch */ color: oklch(37.4% 0.112 262.8);

Tailwind

colors: {
  custom: {
    50: '#6872a2',
    500: '#1f3d7b',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d7b;
$custom-light: #6872a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d7b",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 220.435,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.3739,
    "c": 0.11162,
    "h": 262.8
  },
  "luminance": 0.05059
}

Semantic roles & 50–950 ramp

primary

#1F3D7B

secondary

#AE8D48

accent

#AF45E3

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F3D7B

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

Preview Lab → · Contrast checker → · Palette generator →