#1F387F#1F387F

#1F387F is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.6% C 0.124 H 265.8°. Best body text is #FFFFFF at 10.88:1 contrast (WCAG AA passes).

Color values

HEX	#1F387F
RGB	rgb(31, 56, 127)
HSL	hsl(224, 61%, 31%)
HSV	hsv(224, 76%, 50%)
CMYK	cmyk(75.6%, 55.9%, 0%, 50.2%)
CIE-LAB	lab(25.72, 17.13, -43.01)
CIE-LCH	lch(25.72, 46.30, 291.72°)
OKLab	oklab(36.59% -0.0091 -0.1239)
OKLCH	oklch(36.59% 0.124 265.8)
XYZ	xyz(5.8087, 4.6513, 20.6662)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F387F #7F661F

analogous

#1F687F #1F387F #361F7F

triadic

#1F387F #7F1F38 #387F1F

tetradic

#1F387F #7F1F68 #7F661F #1F7F36

square

#1F387F #7F1F68 #7F661F #1F7F36

split-complementary

#1F387F #7F361F #687F1F

monochromatic

#070D1D #13224E #1F387F #2B4EB0 #466BD2

Accessibility & contrast

On white

10.88

#1F387F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F387F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F387F

10.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F387F	#FFFFFF	#000000	##FFFFFF
##1F387F	1.00	10.88	1.93	10.88
#FFFFFF	10.88	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#014281

Deuteranopia (green-blind)

#00397E

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f387f;
/* rgb */ color: rgb(31, 56, 127);
/* oklch */ color: oklch(36.6% 0.124 265.8);

Tailwind

colors: {
  custom: {
    50: '#696ea5',
    500: '#1f387f',
    950: '#000000',
  },
}

SCSS

$custom: #1f387f;
$custom-light: #696ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f387f",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 127
  },
  "hsl": {
    "h": 224.375,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.36585,
    "c": 0.12419,
    "h": 265.8
  },
  "luminance": 0.04652
}

Semantic roles & 50–950 ramp

primary

#1F387F

secondary

#B29648

accent

#BA44E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F387F

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

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