#1F376B#1F376B

#1F376B is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.8% C 0.095 H 263.6°. Best body text is #FFFFFF at 11.56:1 contrast (WCAG AA passes).

Color values

HEX	#1F376B
RGB	rgb(31, 55, 107)
HSL	hsl(221, 55%, 27%)
HSV	hsv(221, 71%, 42%)
CMYK	cmyk(71%, 48.6%, 0%, 58%)
CIE-LAB	lab(23.95, 9.81, -33.15)
CIE-LCH	lch(23.95, 34.57, 286.48°)
OKLab	oklab(34.77% -0.0107 -0.0948)
OKLCH	oklch(34.77% 0.095 263.6)
XYZ	xyz(4.5842, 4.0848, 14.4539)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F376B #6B531F

analogous

#1F5D6B #1F376B #2D1F6B

triadic

#1F376B #6B1F37 #376B1F

tetradic

#1F376B #6B1F5D #6B531F #1F6B2D

square

#1F376B #6B1F5D #6B531F #1F6B2D

split-complementary

#1F376B #6B2D1F #5D6B1F

monochromatic

#070C18 #111F3C #1F376B #2D4F9A #3D69C7

Accessibility & contrast

On white

11.56

#1F376B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1F376B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F376B

11.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F376B	#FFFFFF	#000000	##FFFFFF
##1F376B	1.00	11.56	1.82	11.56
#FFFFFF	11.56	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D3D6D

Deuteranopia (green-blind)

#0E366A

Tritanopia (blue-blind)

#00434B

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f376b;
/* rgb */ color: rgb(31, 55, 107);
/* oklch */ color: oklch(34.8% 0.095 263.6);

Tailwind

colors: {
  custom: {
    50: '#646d96',
    500: '#1f376b',
    950: '#000000',
  },
}

SCSS

$custom: #1f376b;
$custom-light: #646d96;
$custom-dark: #000000;

JSON

{
  "hex": "#1f376b",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 107
  },
  "hsl": {
    "h": 221.053,
    "s": 55.072,
    "l": 27.059
  },
  "oklch": {
    "l": 0.34771,
    "c": 0.09545,
    "h": 263.6
  },
  "luminance": 0.04085
}

Semantic roles & 50–950 ramp

primary

#1F376B

secondary

#9F8347

accent

#AF49DE

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #1F376B

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

Preview Lab → · Contrast checker → · Palette generator →