#1F437C#1F437C

#1F437C is a dark, moderate blue. Relative luminance 0.058; OKLCH L 38.9% C 0.105 H 259.3°. Best body text is #FFFFFF at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#1F437C
RGB	rgb(31, 67, 124)
HSL	hsl(217, 60%, 30%)
HSV	hsv(217, 75%, 49%)
CMYK	cmyk(75%, 46%, 0%, 51.4%)
CIE-LAB	lab(28.80, 8.27, -36.16)
CIE-LCH	lch(28.80, 37.10, 282.88°)
OKLab	oklab(38.87% -0.0196 -0.1035)
OKLCH	oklch(38.87% 0.105 259.3)
XYZ	xyz(6.2090, 5.7602, 19.8495)
Luminance	0.0576 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F437C #7C581F

analogous

#1F717C #1F437C #291F7C

triadic

#1F437C #7C1F43 #437C1F

tetradic

#1F437C #7C1F71 #7C581F #1F7C29

square

#1F437C #7C1F71 #7C581F #1F7C29

split-complementary

#1F437C #7C291F #717C1F

monochromatic

#070E1A #13294B #1F437C #2B5DAD #457BD0

Accessibility & contrast

On white

9.76

#1F437C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1F437C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F437C

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F437C	#FFFFFF	#000000	##FFFFFF
##1F437C	1.00	9.76	2.15	9.76
#FFFFFF	9.76	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#27487E

Deuteranopia (green-blind)

#15407B

Tritanopia (blue-blind)

#005059

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f437c;
/* rgb */ color: rgb(31, 67, 124);
/* oklch */ color: oklch(38.9% 0.105 259.3);

Tailwind

colors: {
  custom: {
    50: '#6876a2',
    500: '#1f437c',
    950: '#000000',
  },
}

SCSS

$custom: #1f437c;
$custom-light: #6876a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f437c",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 124
  },
  "hsl": {
    "h": 216.774,
    "s": 60,
    "l": 30.392
  },
  "oklch": {
    "l": 0.38872,
    "c": 0.10535,
    "h": 259.3
  },
  "luminance": 0.05761
}

Semantic roles & 50–950 ramp

primary

#1F437C

secondary

#AF8748

accent

#A645E3

background

#F6F7FA

surface

#EBEDF3

border

#C6C8CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F437C

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

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