#1F387E#1F387E

#1F387E is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.5% C 0.123 H 265.7°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F387E
RGB	rgb(31, 56, 126)
HSL	hsl(224, 61%, 31%)
HSV	hsv(224, 75%, 49%)
CMYK	cmyk(75.4%, 55.6%, 0%, 50.6%)
CIE-LAB	lab(25.64, 16.73, -42.51)
CIE-LCH	lch(25.64, 45.68, 291.48°)
OKLab	oklab(36.5% -0.0091 -0.1224)
OKLCH	oklch(36.5% 0.123 265.7)
XYZ	xyz(5.7438, 4.6254, 20.3247)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F387E #7E651F

analogous

#1F677E #1F387E #361F7E

triadic

#1F387E #7E1F38 #387E1F

tetradic

#1F387E #7E1F67 #7E651F #1F7E36

square

#1F387E #7E1F67 #7E651F #1F7E36

split-complementary

#1F387E #7E361F #677E1F

monochromatic

#070C1C #13224D #1F387E #2B4EAF #466BD1

Accessibility & contrast

On white

10.91

#1F387E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F387E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F387E

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F387E	#FFFFFF	#000000	##FFFFFF
##1F387E	1.00	10.91	1.93	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#034180

Deuteranopia (green-blind)

#00397D

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f387e;
/* rgb */ color: rgb(31, 56, 126);
/* oklch */ color: oklch(36.5% 0.123 265.7);

Tailwind

colors: {
  custom: {
    50: '#696ea4',
    500: '#1f387e',
    950: '#000000',
  },
}

SCSS

$custom: #1f387e;
$custom-light: #696ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f387e",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 126
  },
  "hsl": {
    "h": 224.211,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36502,
    "c": 0.12272,
    "h": 265.7
  },
  "luminance": 0.04626
}

Semantic roles & 50–950 ramp

primary

#1F387E

secondary

#B19548

accent

#BA44E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F387E

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

Preview Lab → · Contrast checker → · Palette generator →