#1F379E#1F379E

#1F379E is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.2% C 0.169 H 267.4°. Best body text is #FFFFFF at 10.01:1 contrast (WCAG AA passes).

Color values

HEX	#1F379E
RGB	rgb(31, 55, 158)
HSL	hsl(229, 67%, 37%)
HSV	hsv(229, 80%, 62%)
CMYK	cmyk(80.4%, 65.2%, 0%, 38%)
CIE-LAB	lab(28.09, 29.99, -58.29)
CIE-LCH	lch(28.09, 65.55, 297.23°)
OKLab	oklab(39.18% -0.0077 -0.1687)
OKLCH	oklch(39.18% 0.169 267.4)
XYZ	xyz(8.1007, 5.4914, 32.9741)
Luminance	0.0549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F379E #9E861F

analogous

#1F779E #1F379E #461F9E

triadic

#1F379E #9E1F37 #379E1F

tetradic

#1F379E #9E1F77 #9E861F #1F9E46

square

#1F379E #9E1F77 #9E861F #1F9E46

split-complementary

#1F379E #9E461F #779E1F

monochromatic

#0B1338 #15256B #1F379E #2949D1 #5972DE

Accessibility & contrast

On white

10.01

#1F379E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1F379E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F379E

10.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F379E	#FFFFFF	#000000	##FFFFFF
##1F379E	1.00	10.01	2.10	10.01
#FFFFFF	10.01	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048A1

Deuteranopia (green-blind)

#003C9C

Tritanopia (blue-blind)

#005265

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f379e;
/* rgb */ color: rgb(31, 55, 158);
/* oklch */ color: oklch(39.2% 0.169 267.4);

Tailwind

colors: {
  custom: {
    50: '#716dbc',
    500: '#1f379e',
    950: '#000000',
  },
}

SCSS

$custom: #1f379e;
$custom-light: #716dbc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f379e",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 158
  },
  "hsl": {
    "h": 228.661,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.39178,
    "c": 0.16888,
    "h": 267.4
  },
  "luminance": 0.05492
}

Semantic roles & 50–950 ramp

primary

#1F379E

secondary

#C2AE56

accent

#CA3EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F379E

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

Preview Lab → · Contrast checker → · Palette generator →