#1F306F#1F306F

#1F306F is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.5% C 0.111 H 268.4°. Best body text is #FFFFFF at 12.28:1 contrast (WCAG AA passes).

Color values

HEX	#1F306F
RGB	rgb(31, 48, 111)
HSL	hsl(227, 56%, 28%)
HSV	hsv(227, 72%, 44%)
CMYK	cmyk(72.1%, 56.8%, 0%, 56.5%)
CIE-LAB	lab(22.13, 16.38, -38.65)
CIE-LCH	lch(22.13, 41.98, 292.97°)
OKLab	oklab(33.48% -0.0031 -0.1112)
OKLCH	oklch(33.48% 0.111 268.4)
XYZ	xyz(4.4903, 3.5525, 15.4849)
Luminance	0.0355 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F306F #6F5E1F

analogous

#1F586F #1F306F #361F6F

triadic

#1F306F #6F1F30 #306F1F

tetradic

#1F306F #6F1F58 #6F5E1F #1F6F36

square

#1F306F #6F1F58 #6F5E1F #1F6F36

split-complementary

#1F306F #6F361F #586F1F

monochromatic

#070A18 #121B3F #1F306F #2C459F #3F5CC9

Accessibility & contrast

On white

12.28

#1F306F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1F306F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F306F

12.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F306F	#FFFFFF	#000000	##FFFFFF
##1F306F	1.00	12.28	1.71	12.28
#FFFFFF	12.28	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#023971

Deuteranopia (green-blind)

#00316E

Tritanopia (blue-blind)

#003F4A

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f306f;
/* rgb */ color: rgb(31, 48, 111);
/* oklch */ color: oklch(33.5% 0.111 268.4);

Tailwind

colors: {
  custom: {
    50: '#666799',
    500: '#1f306f',
    950: '#000000',
  },
}

SCSS

$custom: #1f306f;
$custom-light: #666799;
$custom-dark: #000000;

JSON

{
  "hex": "#1f306f",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 111
  },
  "hsl": {
    "h": 227.25,
    "s": 56.338,
    "l": 27.843
  },
  "oklch": {
    "l": 0.33484,
    "c": 0.1112,
    "h": 268.4
  },
  "luminance": 0.03553
}

Semantic roles & 50–950 ramp

primary

#1F306F

secondary

#A38F47

accent

#BF48E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F306F

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

Preview Lab → · Contrast checker → · Palette generator →