#1F437E#1F437E

#1F437E is a dark, moderate blue. Relative luminance 0.058; OKLCH L 39.0% C 0.108 H 259.8°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F437E
RGB	rgb(31, 67, 126)
HSL	hsl(217, 61%, 31%)
HSV	hsv(217, 75%, 49%)
CMYK	cmyk(75.4%, 46.8%, 0%, 50.6%)
CIE-LAB	lab(28.93, 9.07, -37.20)
CIE-LCH	lch(28.93, 38.29, 283.71°)
OKLab	oklab(39.02% -0.0192 -0.1066)
OKLCH	oklch(39.02% 0.108 259.8)
XYZ	xyz(6.3368, 5.8113, 20.5223)
Luminance	0.0581 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F437E #7E5A1F

analogous

#1F727E #1F437E #2A1F7E

triadic

#1F437E #7E1F43 #437E1F

tetradic

#1F437E #7E1F72 #7E5A1F #1F7E2A

square

#1F437E #7E1F72 #7E5A1F #1F7E2A

split-complementary

#1F437E #7E2A1F #727E1F

monochromatic

#070F1C #13294D #1F437E #2B5DAF #467BD1

Accessibility & contrast

On white

9.71

#1F437E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1F437E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F437E

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F437E	#FFFFFF	#000000	##FFFFFF
##1F437E	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254980

Deuteranopia (green-blind)

#11407D

Tritanopia (blue-blind)

#00515A

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f437e;
/* rgb */ color: rgb(31, 67, 126);
/* oklch */ color: oklch(39.0% 0.108 259.8);

Tailwind

colors: {
  custom: {
    50: '#6876a4',
    500: '#1f437e',
    950: '#000000',
  },
}

SCSS

$custom: #1f437e;
$custom-light: #6876a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f437e",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 126
  },
  "hsl": {
    "h": 217.263,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.39016,
    "c": 0.10827,
    "h": 259.8
  },
  "luminance": 0.05812
}

Semantic roles & 50–950 ramp

primary

#1F437E

secondary

#B18948

accent

#A744E4

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F437E

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

Preview Lab → · Contrast checker → · Palette generator →