#1F3CA0#1F3CA0

#1F3CA0 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.3% C 0.165 H 266.3°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F3CA0
RGB	rgb(31, 60, 160)
HSL	hsl(227, 68%, 37%)
HSV	hsv(227, 81%, 63%)
CMYK	cmyk(80.6%, 62.5%, 0%, 37.3%)
CIE-LAB	lab(29.56, 27.41, -57.09)
CIE-LCH	lch(29.56, 63.33, 295.65°)
OKLab	oklab(40.32% -0.0107 -0.1651)
OKLCH	oklch(40.32% 0.165 266.3)
XYZ	xyz(8.5239, 6.0601, 33.9714)
Luminance	0.0606 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3CA0 #A0831F

analogous

#1F7CA0 #1F3CA0 #431FA0

triadic

#1F3CA0 #A01F3C #3CA01F

tetradic

#1F3CA0 #A01F7C #A0831F #1FA043

square

#1F3CA0 #A01F7C #A0831F #1FA043

split-complementary

#1F3CA0 #A0431F #7CA01F

monochromatic

#0B1639 #15296D #1F3CA0 #294FD3 #5A78DF

Accessibility & contrast

On white

9.49

#1F3CA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1F3CA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3CA0

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3CA0	#FFFFFF	#000000	##FFFFFF
##1F3CA0	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#00409E

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3ca0;
/* rgb */ color: rgb(31, 60, 160);
/* oklch */ color: oklch(40.3% 0.165 266.3);

Tailwind

colors: {
  custom: {
    50: '#7171bd',
    500: '#1f3ca0',
    950: '#000000',
  },
}

SCSS

$custom: #1f3ca0;
$custom-light: #7171bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3ca0",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 160
  },
  "hsl": {
    "h": 226.512,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40322,
    "c": 0.16548,
    "h": 266.3
  },
  "luminance": 0.06061
}

Semantic roles & 50–950 ramp

primary

#1F3CA0

secondary

#C3AB58

accent

#C43DEA

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3CA0

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

Preview Lab → · Contrast checker → · Palette generator →