#1F306E#1F306E

#1F306E is a dark, moderate blue. Relative luminance 0.035; OKLCH L 33.4% C 0.110 H 268.3°. Best body text is #FFFFFF at 12.31:1 contrast (WCAG AA passes).

Color values

HEX	#1F306E
RGB	rgb(31, 48, 110)
HSL	hsl(227, 56%, 28%)
HSV	hsv(227, 72%, 43%)
CMYK	cmyk(71.8%, 56.4%, 0%, 56.9%)
CIE-LAB	lab(22.05, 15.98, -38.13)
CIE-LCH	lch(22.05, 41.35, 292.74°)
OKLab	oklab(33.4% -0.0032 -0.1096)
OKLCH	oklch(33.4% 0.11 268.3)
XYZ	xyz(4.4355, 3.5306, 15.1965)
Luminance	0.0353 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F306E #6E5D1F

analogous

#1F576E #1F306E #361F6E

triadic

#1F306E #6E1F30 #306E1F

tetradic

#1F306E #6E1F57 #6E5D1F #1F6E36

square

#1F306E #6E1F57 #6E5D1F #1F6E36

split-complementary

#1F306E #6E361F #576E1F

monochromatic

#070A18 #121B3E #1F306E #2C459E #3F5CC9

Accessibility & contrast

On white

12.31

#1F306E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1F306E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F306E

12.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F306E	#FFFFFF	#000000	##FFFFFF
##1F306E	1.00	12.31	1.71	12.31
#FFFFFF	12.31	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#043970

Deuteranopia (green-blind)

#00316D

Tritanopia (blue-blind)

#003F4A

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f306e;
/* rgb */ color: rgb(31, 48, 110);
/* oklch */ color: oklch(33.4% 0.110 268.3);

Tailwind

colors: {
  custom: {
    50: '#656798',
    500: '#1f306e',
    950: '#000000',
  },
}

SCSS

$custom: #1f306e;
$custom-light: #656798;
$custom-dark: #000000;

JSON

{
  "hex": "#1f306e",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 110
  },
  "hsl": {
    "h": 227.089,
    "s": 56.028,
    "l": 27.647
  },
  "oklch": {
    "l": 0.334,
    "c": 0.10969,
    "h": 268.3
  },
  "luminance": 0.03531
}

Semantic roles & 50–950 ramp

primary

#1F306E

secondary

#A28E47

accent

#BF48DF

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F306E

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

Preview Lab → · Contrast checker → · Palette generator →