#1F387D#1F387D

#1F387D is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.4% C 0.121 H 265.6°. Best body text is #FFFFFF at 10.94:1 contrast (WCAG AA passes).

Color values

HEX	#1F387D
RGB	rgb(31, 56, 125)
HSL	hsl(224, 60%, 31%)
HSV	hsv(224, 75%, 49%)
CMYK	cmyk(75.2%, 55.2%, 0%, 51%)
CIE-LAB	lab(25.56, 16.33, -42.00)
CIE-LCH	lch(25.56, 45.07, 291.24°)
OKLab	oklab(36.42% -0.0092 -0.1209)
OKLCH	oklch(36.42% 0.121 265.6)
XYZ	xyz(5.6796, 4.5997, 19.9866)
Luminance	0.0460 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F387D #7D641F

analogous

#1F677D #1F387D #351F7D

triadic

#1F387D #7D1F38 #387D1F

tetradic

#1F387D #7D1F67 #7D641F #1F7D35

square

#1F387D #7D1F67 #7D641F #1F7D35

split-complementary

#1F387D #7D351F #677D1F

monochromatic

#070C1B #13224C #1F387D #2B4EAE #456BD1

Accessibility & contrast

On white

10.94

#1F387D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1F387D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F387D

10.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F387D	#FFFFFF	#000000	##FFFFFF
##1F387D	1.00	10.94	1.92	10.94
#FFFFFF	10.94	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06417F

Deuteranopia (green-blind)

#00387C

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f387d;
/* rgb */ color: rgb(31, 56, 125);
/* oklch */ color: oklch(36.4% 0.121 265.6);

Tailwind

colors: {
  custom: {
    50: '#696ea3',
    500: '#1f387d',
    950: '#000000',
  },
}

SCSS

$custom: #1f387d;
$custom-light: #696ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f387d",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 125
  },
  "hsl": {
    "h": 224.043,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.36419,
    "c": 0.12125,
    "h": 265.6
  },
  "luminance": 0.046
}

Semantic roles & 50–950 ramp

primary

#1F387D

secondary

#B09448

accent

#B944E3

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F387D

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

Preview Lab → · Contrast checker → · Palette generator →