#1F3F7A#1F3F7A

#1F3F7A is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.8% C 0.108 H 261.4°. Best body text is #FFFFFF at 10.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F7A
RGB	rgb(31, 63, 122)
HSL	hsl(219, 59%, 30%)
HSV	hsv(219, 75%, 48%)
CMYK	cmyk(74.6%, 48.4%, 0%, 52.2%)
CIE-LAB	lab(27.44, 10.23, -37.09)
CIE-LCH	lch(27.44, 38.48, 285.42°)
OKLab	oklab(37.78% -0.0161 -0.1063)
OKLCH	oklch(37.78% 0.108 261.4)
XYZ	xyz(5.8542, 5.2508, 19.1136)
Luminance	0.0525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F7A #7A5A1F

analogous

#1F6D7A #1F3F7A #2C1F7A

triadic

#1F3F7A #7A1F3F #3F7A1F

tetradic

#1F3F7A #7A1F6D #7A5A1F #1F7A2C

square

#1F3F7A #7A1F6D #7A5A1F #1F7A2C

split-complementary

#1F3F7A #7A2C1F #6D7A1F

monochromatic

#060D18 #132649 #1F3F7A #2B58AB #4475CF

Accessibility & contrast

On white

10.24

#1F3F7A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1F3F7A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F7A

10.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F7A	#FFFFFF	#000000	##FFFFFF
##1F3F7A	1.00	10.24	2.05	10.24
#FFFFFF	10.24	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#20457C

Deuteranopia (green-blind)

#0B3D79

Tritanopia (blue-blind)

#004D56

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f3f7a;
/* rgb */ color: rgb(31, 63, 122);
/* oklch */ color: oklch(37.8% 0.108 261.4);

Tailwind

colors: {
  custom: {
    50: '#6873a1',
    500: '#1f3f7a',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f7a;
$custom-light: #6873a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f7a",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 122
  },
  "hsl": {
    "h": 218.901,
    "s": 59.477,
    "l": 30
  },
  "oklch": {
    "l": 0.3778,
    "c": 0.10752,
    "h": 261.4
  },
  "luminance": 0.05251
}

Semantic roles & 50–950 ramp

primary

#1F3F7A

secondary

#AD8A47

accent

#AB45E3

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080F

muted

#7A7B7E

Preview Lab

Preview with #1F3F7A

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

Preview Lab → · Contrast checker → · Palette generator →