#1F306D#1F306D

#1F306D is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.3% C 0.108 H 268.3°. Best body text is #FFFFFF at 12.34:1 contrast (WCAG AA passes).

Color values

HEX	#1F306D
RGB	rgb(31, 48, 109)
HSL	hsl(227, 56%, 27%)
HSV	hsv(227, 72%, 43%)
CMYK	cmyk(71.6%, 56%, 0%, 57.3%)
CIE-LAB	lab(21.98, 15.59, -37.61)
CIE-LCH	lch(21.98, 40.71, 292.51°)
OKLab	oklab(33.32% -0.0033 -0.1081)
OKLCH	oklch(33.32% 0.108 268.3)
XYZ	xyz(4.3814, 3.5089, 14.9114)
Luminance	0.0351 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F306D #6D5C1F

analogous

#1F576D #1F306D #351F6D

triadic

#1F306D #6D1F30 #306D1F

tetradic

#1F306D #6D1F57 #6D5C1F #1F6D35

square

#1F306D #6D1F57 #6D5C1F #1F6D35

split-complementary

#1F306D #6D351F #576D1F

monochromatic

#070A18 #111B3D #1F306D #2D459D #3E5CC8

Accessibility & contrast

On white

12.34

#1F306D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1F306D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F306D

12.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F306D	#FFFFFF	#000000	##FFFFFF
##1F306D	1.00	12.34	1.70	12.34
#FFFFFF	12.34	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06386F

Deuteranopia (green-blind)

#00316C

Tritanopia (blue-blind)

#003F49

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f306d;
/* rgb */ color: rgb(31, 48, 109);
/* oklch */ color: oklch(33.3% 0.108 268.3);

Tailwind

colors: {
  custom: {
    50: '#656797',
    500: '#1f306d',
    950: '#000000',
  },
}

SCSS

$custom: #1f306d;
$custom-light: #656797;
$custom-dark: #000000;

JSON

{
  "hex": "#1f306d",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 109
  },
  "hsl": {
    "h": 226.923,
    "s": 55.714,
    "l": 27.451
  },
  "oklch": {
    "l": 0.33316,
    "c": 0.10816,
    "h": 268.3
  },
  "luminance": 0.03509
}

Semantic roles & 50–950 ramp

primary

#1F306D

secondary

#A18D47

accent

#BE49DF

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1F306D

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

Preview Lab → · Contrast checker → · Palette generator →