#1F4071#1F4071

#1F4071 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.093 H 258.2°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#1F4071
RGB	rgb(31, 64, 113)
HSL	hsl(216, 57%, 28%)
HSV	hsv(216, 73%, 44%)
CMYK	cmyk(72.6%, 43.4%, 0%, 55.7%)
CIE-LAB	lab(27.16, 5.93, -31.85)
CIE-LCH	lch(27.16, 32.40, 280.55°)
OKLab	oklab(37.37% -0.0189 -0.0909)
OKLCH	oklch(37.37% 0.093 258.2)
XYZ	xyz(5.3780, 5.1498, 16.3302)
Luminance	0.0515 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4071 #71501F

analogous

#1F6971 #1F4071 #271F71

triadic

#1F4071 #711F40 #40711F

tetradic

#1F4071 #711F69 #71501F #1F7127

square

#1F4071 #711F69 #71501F #1F7127

split-complementary

#1F4071 #71271F #69711F

monochromatic

#070E18 #122541 #1F4071 #2C5BA1 #4078CB

Accessibility & contrast

On white

10.34

#1F4071 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F4071 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4071

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4071	#FFFFFF	#000000	##FFFFFF
##1F4071	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294473

Deuteranopia (green-blind)

#1C3D70

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f4071;
/* rgb */ color: rgb(31, 64, 113);
/* oklch */ color: oklch(37.4% 0.093 258.2);

Tailwind

colors: {
  custom: {
    50: '#65749a',
    500: '#1f4071',
    950: '#000000',
  },
}

SCSS

$custom: #1f4071;
$custom-light: #65749a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4071",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 113
  },
  "hsl": {
    "h": 215.854,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.37373,
    "c": 0.09284,
    "h": 258.2
  },
  "luminance": 0.0515
}

Semantic roles & 50–950 ramp

primary

#1F4071

secondary

#A57F47

accent

#A348E0

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1F4071

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

Preview Lab → · Contrast checker → · Palette generator →