#1F40A8#1F40A8

#1F40A8 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.8% C 0.171 H 265.6°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F40A8
RGB	rgb(31, 64, 168)
HSL	hsl(226, 69%, 39%)
HSV	hsv(226, 82%, 66%)
CMYK	cmyk(81.5%, 61.9%, 0%, 34.1%)
CIE-LAB	lab(31.31, 27.82, -59.06)
CIE-LCH	lch(31.31, 65.28, 295.23°)
OKLab	oklab(41.83% -0.013 -0.1708)
OKLCH	oklch(41.83% 0.171 265.6)
XYZ	xyz(9.4639, 6.7841, 37.8489)
Luminance	0.0678 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F40A8 #A8871F

analogous

#1F85A8 #1F40A8 #421FA8

triadic

#1F40A8 #A81F40 #40A81F

tetradic

#1F40A8 #A81F85 #A8871F #1FA842

square

#1F40A8 #A81F85 #A8871F #1FA842

split-complementary

#1F40A8 #A8421F #85A81F

monochromatic

#0C1941 #152C74 #1F40A8 #2C56D8 #607FE2

Accessibility & contrast

On white

8.91

#1F40A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1F40A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F40A8

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F40A8	#FFFFFF	#000000	##FFFFFF
##1F40A8	1.00	8.91	2.36	8.91
#FFFFFF	8.91	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#005B6E

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f40a8;
/* rgb */ color: rgb(31, 64, 168);
/* oklch */ color: oklch(41.8% 0.171 265.6);

Tailwind

colors: {
  custom: {
    50: '#7374c3',
    500: '#1f40a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f40a8;
$custom-light: #7374c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f40a8",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 168
  },
  "hsl": {
    "h": 225.547,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.41834,
    "c": 0.17135,
    "h": 265.6
  },
  "luminance": 0.06785
}

Semantic roles & 50–950 ramp

primary

#1F40A8

secondary

#C6AD5D

accent

#C13CEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F40A8

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

Preview Lab → · Contrast checker → · Palette generator →