#1F306A#1F306A

#1F306A is a dark, moderate blue. Relative luminance 0.034; OKLCH L 33.1% C 0.104 H 268.0°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1F306A
RGB	rgb(31, 48, 106)
HSL	hsl(226, 55%, 27%)
HSV	hsv(226, 71%, 42%)
CMYK	cmyk(70.8%, 54.7%, 0%, 58.4%)
CIE-LAB	lab(21.75, 14.39, -36.05)
CIE-LCH	lch(21.75, 38.81, 291.76°)
OKLab	oklab(33.07% -0.0036 -0.1035)
OKLCH	oklch(33.07% 0.104 268)
XYZ	xyz(4.2227, 3.4454, 14.0754)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F306A #6A591F

analogous

#1F566A #1F306A #341F6A

triadic

#1F306A #6A1F30 #306A1F

tetradic

#1F306A #6A1F56 #6A591F #1F6A34

square

#1F306A #6A1F56 #6A591F #1F6A34

split-complementary

#1F306A #6A341F #566A1F

monochromatic

#070B18 #111B3B #1F306A #2D4599 #3D5CC6

Accessibility & contrast

On white

12.43

#1F306A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1F306A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F306A

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F306A	#FFFFFF	#000000	##FFFFFF
##1F306A	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C386C

Deuteranopia (green-blind)

#003169

Tritanopia (blue-blind)

#003E48

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f306a;
/* rgb */ color: rgb(31, 48, 106);
/* oklch */ color: oklch(33.1% 0.104 268.0);

Tailwind

colors: {
  custom: {
    50: '#656795',
    500: '#1f306a',
    950: '#000000',
  },
}

SCSS

$custom: #1f306a;
$custom-light: #656795;
$custom-dark: #000000;

JSON

{
  "hex": "#1f306a",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 106
  },
  "hsl": {
    "h": 226.4,
    "s": 54.745,
    "l": 26.863
  },
  "oklch": {
    "l": 0.33068,
    "c": 0.10356,
    "h": 268
  },
  "luminance": 0.03446
}

Semantic roles & 50–950 ramp

primary

#1F306A

secondary

#9E8A47

accent

#BC4ADE

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1F306A

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

Preview Lab → · Contrast checker → · Palette generator →