#1F41B4#1F41B4

#1F41B4 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.1% C 0.186 H 265.8°. Best body text is #FFFFFF at 8.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F41B4
RGB	rgb(31, 65, 180)
HSL	hsl(226, 71%, 41%)
HSV	hsv(226, 83%, 71%)
CMYK	cmyk(82.8%, 63.9%, 0%, 29.4%)
CIE-LAB	lab(32.63, 31.76, -64.06)
CIE-LCH	lch(32.63, 71.50, 296.37°)
OKLab	oklab(43.14% -0.0136 -0.1855)
OKLCH	oklch(43.14% 0.186 265.8)
XYZ	xyz(10.6907, 7.3659, 44.0295)
Luminance	0.0737 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F41B4 #B4921F

analogous

#1F8CB4 #1F41B4 #481FB4

triadic

#1F41B4 #B41F41 #41B41F

tetradic

#1F41B4 #B41F8C #B4921F #1FB448

square

#1F41B4 #B41F8C #B4921F #1FB448

split-complementary

#1F41B4 #B4481F #8CB41F

monochromatic

#0D1B4C #162E80 #1F41B4 #345ADC #6885E5

Accessibility & contrast

On white

8.49

#1F41B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#1F41B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F41B4

8.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F41B4	#FFFFFF	#000000	##FFFFFF
##1F41B4	1.00	8.49	2.47	8.49
#FFFFFF	8.49	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B8

Deuteranopia (green-blind)

#0046B2

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f41b4;
/* rgb */ color: rgb(31, 65, 180);
/* oklch */ color: oklch(43.1% 0.186 265.8);

Tailwind

colors: {
  custom: {
    50: '#7675cb',
    500: '#1f41b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f41b4;
$custom-light: #7675cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f41b4",
  "rgb": {
    "r": 31,
    "g": 65,
    "b": 180
  },
  "hsl": {
    "h": 226.309,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.43135,
    "c": 0.18599,
    "h": 265.8
  },
  "luminance": 0.07367
}

Semantic roles & 50–950 ramp

primary

#1F41B4

secondary

#CBB364

accent

#C53AED

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F41B4

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

Preview Lab → · Contrast checker → · Palette generator →