#1F3DA0#1F3DA0

#1F3DA0 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.164 H 266.1°. Best body text is #FFFFFF at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F3DA0
RGB	rgb(31, 61, 160)
HSL	hsl(226, 68%, 37%)
HSV	hsv(226, 81%, 63%)
CMYK	cmyk(80.6%, 61.9%, 0%, 37.3%)
CIE-LAB	lab(29.83, 26.74, -56.66)
CIE-LCH	lch(29.83, 62.65, 295.26°)
OKLab	oklab(40.52% -0.0113 -0.1639)
OKLCH	oklch(40.52% 0.164 266.1)
XYZ	xyz(8.5767, 6.1659, 33.9890)
Luminance	0.0617 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3DA0 #A0821F

analogous

#1F7DA0 #1F3DA0 #421FA0

triadic

#1F3DA0 #A01F3D #3DA01F

tetradic

#1F3DA0 #A01F7D #A0821F #1FA042

square

#1F3DA0 #A01F7D #A0821F #1FA042

split-complementary

#1F3DA0 #A0421F #7DA01F

monochromatic

#0B1639 #15296D #1F3DA0 #2951D3 #5A79DF

Accessibility & contrast

On white

9.40

#1F3DA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1F3DA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3DA0

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3DA0	#FFFFFF	#000000	##FFFFFF
##1F3DA0	1.00	9.40	2.23	9.40
#FFFFFF	9.40	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA3

Deuteranopia (green-blind)

#00409E

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f3da0;
/* rgb */ color: rgb(31, 61, 160);
/* oklch */ color: oklch(40.5% 0.164 266.1);

Tailwind

colors: {
  custom: {
    50: '#7172bd',
    500: '#1f3da0',
    950: '#000000',
  },
}

SCSS

$custom: #1f3da0;
$custom-light: #7172bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3da0",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 160
  },
  "hsl": {
    "h": 226.047,
    "s": 67.539,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40517,
    "c": 0.16426,
    "h": 266.1
  },
  "luminance": 0.06167
}

Semantic roles & 50–950 ramp

primary

#1F3DA0

secondary

#C3AA58

accent

#C23DEA

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1F3DA0

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

Preview Lab → · Contrast checker → · Palette generator →