#1F389C#1F389C

#1F389C is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.2% C 0.165 H 267.1°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F389C
RGB	rgb(31, 56, 156)
HSL	hsl(228, 67%, 37%)
HSV	hsv(228, 80%, 61%)
CMYK	cmyk(80.1%, 64.1%, 0%, 38.8%)
CIE-LAB	lab(28.16, 28.55, -56.95)
CIE-LCH	lch(28.16, 63.71, 296.63°)
OKLab	oklab(39.18% -0.0082 -0.1648)
OKLCH	oklch(39.18% 0.165 267.1)
XYZ	xyz(7.9779, 5.5190, 32.0909)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F389C #9C831F

analogous

#1F779C #1F389C #451F9C

triadic

#1F389C #9C1F38 #389C1F

tetradic

#1F389C #9C1F77 #9C831F #1F9C45

square

#1F389C #9C1F77 #9C831F #1F9C45

split-complementary

#1F389C #9C451F #779C1F

monochromatic

#0B1336 #152669 #1F389C #294ACF #5872DE

Accessibility & contrast

On white

9.98

#1F389C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1F389C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F389C

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F389C	#FFFFFF	#000000	##FFFFFF
##1F389C	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00489F

Deuteranopia (green-blind)

#003D9A

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f389c;
/* rgb */ color: rgb(31, 56, 156);
/* oklch */ color: oklch(39.2% 0.165 267.1);

Tailwind

colors: {
  custom: {
    50: '#716eba',
    500: '#1f389c',
    950: '#000000',
  },
}

SCSS

$custom: #1f389c;
$custom-light: #716eba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f389c",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 156
  },
  "hsl": {
    "h": 228,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.39176,
    "c": 0.16499,
    "h": 267.1
  },
  "luminance": 0.0552
}

Semantic roles & 50–950 ramp

primary

#1F389C

secondary

#C1AC55

accent

#C73EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F389C

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

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