#1F3F77#1F3F77

#1F3F77 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.6% C 0.103 H 260.7°. Best body text is #FFFFFF at 10.32:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F77
RGB	rgb(31, 63, 119)
HSL	hsl(218, 59%, 29%)
HSV	hsv(218, 74%, 47%)
CMYK	cmyk(73.9%, 47.1%, 0%, 53.3%)
CIE-LAB	lab(27.23, 9.02, -35.53)
CIE-LCH	lch(27.23, 36.65, 284.25°)
OKLab	oklab(37.56% -0.0166 -0.1017)
OKLCH	oklch(37.56% 0.103 260.7)
XYZ	xyz(5.6712, 5.1776, 18.1497)
Luminance	0.0518 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F77 #77571F

analogous

#1F6B77 #1F3F77 #2B1F77

triadic

#1F3F77 #771F3F #3F771F

tetradic

#1F3F77 #771F6B #77571F #1F772B

square

#1F3F77 #771F6B #77571F #1F772B

split-complementary

#1F3F77 #772B1F #6B771F

monochromatic

#060D18 #122546 #1F3F77 #2C59A8 #4375CE

Accessibility & contrast

On white

10.32

#1F3F77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1F3F77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F77

10.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F77	#FFFFFF	#000000	##FFFFFF
##1F3F77	1.00	10.32	2.04	10.32
#FFFFFF	10.32	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234579

Deuteranopia (green-blind)

#113D76

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f3f77;
/* rgb */ color: rgb(31, 63, 119);
/* oklch */ color: oklch(37.6% 0.103 260.7);

Tailwind

colors: {
  custom: {
    50: '#67739f',
    500: '#1f3f77',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f77;
$custom-light: #67739f;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f77",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 119
  },
  "hsl": {
    "h": 218.182,
    "s": 58.667,
    "l": 29.412
  },
  "oklch": {
    "l": 0.37559,
    "c": 0.10306,
    "h": 260.7
  },
  "luminance": 0.05178
}

Semantic roles & 50–950 ramp

primary

#1F3F77

secondary

#AB8647

accent

#A946E2

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #1F3F77

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

Preview Lab → · Contrast checker → · Palette generator →