#1F3DA8#1F3DA8

#1F3DA8 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.3% C 0.175 H 266.3°. Best body text is #FFFFFF at 9.17:1 contrast (WCAG AA passes).

Color values

HEX	#1F3DA8
RGB	rgb(31, 61, 168)
HSL	hsl(227, 69%, 39%)
HSV	hsv(227, 82%, 66%)
CMYK	cmyk(81.5%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(30.53, 29.83, -60.33)
CIE-LCH	lch(30.53, 67.30, 296.31°)
OKLab	oklab(41.26% -0.0113 -0.1746)
OKLCH	oklch(41.26% 0.175 266.3)
XYZ	xyz(9.2992, 6.4548, 37.7940)
Luminance	0.0646 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3DA8 #A88A1F

analogous

#1F82A8 #1F3DA8 #461FA8

triadic

#1F3DA8 #A81F3D #3DA81F

tetradic

#1F3DA8 #A81F82 #A88A1F #1FA846

square

#1F3DA8 #A81F82 #A88A1F #1FA846

split-complementary

#1F3DA8 #A8461F #82A81F

monochromatic

#0C1741 #152A74 #1F3DA8 #2C52D8 #607CE2

Accessibility & contrast

On white

9.17

#1F3DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1F3DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3DA8

9.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3DA8	#FFFFFF	#000000	##FFFFFF
##1F3DA8	1.00	9.17	2.29	9.17
#FFFFFF	9.17	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAB

Deuteranopia (green-blind)

#0042A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1f3da8;
/* rgb */ color: rgb(31, 61, 168);
/* oklch */ color: oklch(41.3% 0.175 266.3);

Tailwind

colors: {
  custom: {
    50: '#7372c3',
    500: '#1f3da8',
    950: '#000000',
  },
}

SCSS

$custom: #1f3da8;
$custom-light: #7372c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3da8",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 226.861,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.41258,
    "c": 0.17498,
    "h": 266.3
  },
  "luminance": 0.06456
}

Semantic roles & 50–950 ramp

primary

#1F3DA8

secondary

#C6AF5D

accent

#C53CEC

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F3DA8

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

Preview Lab → · Contrast checker → · Palette generator →