#1F3D74#1F3D74

#1F3D74 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.9% C 0.101 H 261.4°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D74
RGB	rgb(31, 61, 116)
HSL	hsl(219, 58%, 29%)
HSV	hsv(219, 73%, 45%)
CMYK	cmyk(73.3%, 47.4%, 0%, 54.5%)
CIE-LAB	lab(26.42, 9.21, -34.94)
CIE-LCH	lch(26.42, 36.13, 284.76°)
OKLab	oklab(36.86% -0.0152 -0.1)
OKLCH	oklch(36.86% 0.101 261.4)
XYZ	xyz(5.3851, 4.8892, 17.1795)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D74 #74561F

analogous

#1F6874 #1F3D74 #2C1F74

triadic

#1F3D74 #741F3D #3D741F

tetradic

#1F3D74 #741F68 #74561F #1F742C

square

#1F3D74 #741F68 #74561F #1F742C

split-complementary

#1F3D74 #742C1F #68741F

monochromatic

#060D18 #122444 #1F3D74 #2C56A4 #4172CC

Accessibility & contrast

On white

10.62

#1F3D74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1F3D74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D74

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D74	#FFFFFF	#000000	##FFFFFF
##1F3D74	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214376

Deuteranopia (green-blind)

#103B73

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3d74;
/* rgb */ color: rgb(31, 61, 116);
/* oklch */ color: oklch(36.9% 0.101 261.4);

Tailwind

colors: {
  custom: {
    50: '#66729c',
    500: '#1f3d74',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d74;
$custom-light: #66729c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d74",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 116
  },
  "hsl": {
    "h": 218.824,
    "s": 57.823,
    "l": 28.824
  },
  "oklch": {
    "l": 0.36864,
    "c": 0.10117,
    "h": 261.4
  },
  "luminance": 0.0489
}

Semantic roles & 50–950 ramp

primary

#1F3D74

secondary

#A88647

accent

#AB47E1

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1F3D74

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

Preview Lab → · Contrast checker → · Palette generator →