#1F3D7E#1F3D7E

#1F3D7E is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.6% C 0.116 H 263.3°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D7E
RGB	rgb(31, 61, 126)
HSL	hsl(221, 61%, 31%)
HSV	hsv(221, 75%, 49%)
CMYK	cmyk(75.4%, 51.6%, 0%, 50.6%)
CIE-LAB	lab(27.11, 13.23, -40.12)
CIE-LCH	lch(27.11, 42.25, 288.25°)
OKLab	oklab(37.62% -0.0136 -0.1153)
OKLCH	oklch(37.62% 0.116 263.3)
XYZ	xyz(5.9984, 5.1345, 20.4095)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D7E #7E601F

analogous

#1F6C7E #1F3D7E #301F7E

triadic

#1F3D7E #7E1F3D #3D7E1F

tetradic

#1F3D7E #7E1F6C #7E601F #1F7E30

square

#1F3D7E #7E1F6C #7E601F #1F7E30

split-complementary

#1F3D7E #7E301F #6C7E1F

monochromatic

#070D1C #13254D #1F3D7E #2B55AF #4672D1

Accessibility & contrast

On white

10.36

#1F3D7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F3D7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D7E

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D7E	#FFFFFF	#000000	##FFFFFF
##1F3D7E	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174580

Deuteranopia (green-blind)

#003C7D

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3d7e;
/* rgb */ color: rgb(31, 61, 126);
/* oklch */ color: oklch(37.6% 0.116 263.3);

Tailwind

colors: {
  custom: {
    50: '#6972a4',
    500: '#1f3d7e',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d7e;
$custom-light: #6972a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d7e",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 126
  },
  "hsl": {
    "h": 221.053,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37623,
    "c": 0.11607,
    "h": 263.3
  },
  "luminance": 0.05135
}

Semantic roles & 50–950 ramp

primary

#1F3D7E

secondary

#B19048

accent

#B144E4

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F3D7E

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

Preview Lab → · Contrast checker → · Palette generator →