#1F306C#1F306C

#1F306C is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.2% C 0.107 H 268.2°. Best body text is #FFFFFF at 12.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F306C
RGB	rgb(31, 48, 108)
HSL	hsl(227, 55%, 27%)
HSV	hsv(227, 71%, 42%)
CMYK	cmyk(71.3%, 55.6%, 0%, 57.6%)
CIE-LAB	lab(21.90, 15.19, -37.09)
CIE-LCH	lch(21.90, 40.08, 292.27°)
OKLab	oklab(33.23% -0.0034 -0.1066)
OKLCH	oklch(33.23% 0.107 268.2)
XYZ	xyz(4.3279, 3.4875, 14.6295)
Luminance	0.0349 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F306C #6C5B1F

analogous

#1F576C #1F306C #341F6C

triadic

#1F306C #6C1F30 #306C1F

tetradic

#1F306C #6C1F57 #6C5B1F #1F6C34

square

#1F306C #6C1F57 #6C5B1F #1F6C34

split-complementary

#1F306C #6C341F #576C1F

monochromatic

#070B18 #111B3C #1F306C #2D459C #3E5CC8

Accessibility & contrast

On white

12.37

#1F306C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1F306C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F306C

12.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F306C	#FFFFFF	#000000	##FFFFFF
##1F306C	1.00	12.37	1.70	12.37
#FFFFFF	12.37	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#08386E

Deuteranopia (green-blind)

#00316B

Tritanopia (blue-blind)

#003E49

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f306c;
/* rgb */ color: rgb(31, 48, 108);
/* oklch */ color: oklch(33.2% 0.107 268.2);

Tailwind

colors: {
  custom: {
    50: '#656797',
    500: '#1f306c',
    950: '#000000',
  },
}

SCSS

$custom: #1f306c;
$custom-light: #656797;
$custom-dark: #000000;

JSON

{
  "hex": "#1f306c",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 108
  },
  "hsl": {
    "h": 226.753,
    "s": 55.396,
    "l": 27.255
  },
  "oklch": {
    "l": 0.33233,
    "c": 0.10663,
    "h": 268.2
  },
  "luminance": 0.03488
}

Semantic roles & 50–950 ramp

primary

#1F306C

secondary

#A08C47

accent

#BE49DF

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1F306C

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

Preview Lab → · Contrast checker → · Palette generator →