#1F437F#1F437F

#1F437F is a dark, moderate blue. Relative luminance 0.058; OKLCH L 39.1% C 0.110 H 260.0°. Best body text is #FFFFFF at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#1F437F
RGB	rgb(31, 67, 127)
HSL	hsl(218, 61%, 31%)
HSV	hsv(218, 76%, 50%)
CMYK	cmyk(75.6%, 47.2%, 0%, 50.2%)
CIE-LAB	lab(29.00, 9.48, -37.72)
CIE-LCH	lch(29.00, 38.89, 284.10°)
OKLab	oklab(39.09% -0.019 -0.1081)
OKLCH	oklch(39.09% 0.11 260)
XYZ	xyz(6.4016, 5.8372, 20.8639)
Luminance	0.0584 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F437F #7F5B1F

analogous

#1F737F #1F437F #2B1F7F

triadic

#1F437F #7F1F43 #437F1F

tetradic

#1F437F #7F1F73 #7F5B1F #1F7F2B

square

#1F437F #7F1F73 #7F5B1F #1F7F2B

split-complementary

#1F437F #7F2B1F #737F1F

monochromatic

#070F1D #13294E #1F437F #2B5DB0 #467BD2

Accessibility & contrast

On white

9.69

#1F437F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1F437F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F437F

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F437F	#FFFFFF	#000000	##FFFFFF
##1F437F	1.00	9.69	2.17	9.69
#FFFFFF	9.69	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244981

Deuteranopia (green-blind)

#0F407E

Tritanopia (blue-blind)

#00515A

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f437f;
/* rgb */ color: rgb(31, 67, 127);
/* oklch */ color: oklch(39.1% 0.110 260.0);

Tailwind

colors: {
  custom: {
    50: '#6976a4',
    500: '#1f437f',
    950: '#000000',
  },
}

SCSS

$custom: #1f437f;
$custom-light: #6976a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f437f",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 127
  },
  "hsl": {
    "h": 217.5,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.39089,
    "c": 0.10975,
    "h": 260
  },
  "luminance": 0.05838
}

Semantic roles & 50–950 ramp

primary

#1F437F

secondary

#B28A48

accent

#A844E4

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F437F

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

Preview Lab → · Contrast checker → · Palette generator →