#1F41A5#1F41A5

#1F41A5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.8% C 0.166 H 265.3°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#1F41A5
RGB	rgb(31, 65, 165)
HSL	hsl(225, 68%, 38%)
HSV	hsv(225, 81%, 65%)
CMYK	cmyk(81.2%, 60.6%, 0%, 35.3%)
CIE-LAB	lab(31.32, 25.99, -57.24)
CIE-LCH	lch(31.32, 62.86, 294.42°)
OKLab	oklab(41.76% -0.0137 -0.1655)
OKLCH	oklch(41.76% 0.166 265.3)
XYZ	xyz(9.2445, 6.7874, 36.4129)
Luminance	0.0679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F41A5 #A5831F

analogous

#1F84A5 #1F41A5 #401FA5

triadic

#1F41A5 #A51F41 #41A51F

tetradic

#1F41A5 #A51F84 #A5831F #1FA540

square

#1F41A5 #A51F84 #A5831F #1FA540

split-complementary

#1F41A5 #A5401F #84A51F

monochromatic

#0C183E #152D71 #1F41A5 #2A56D7 #5E7FE1

Accessibility & contrast

On white

8.91

#1F41A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1F41A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F41A5

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F41A5	#FFFFFF	#000000	##FFFFFF
##1F41A5	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)

#0050A8

Deuteranopia (green-blind)

#0044A3

Tritanopia (blue-blind)

#005B6C

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1f41a5;
/* rgb */ color: rgb(31, 65, 165);
/* oklch */ color: oklch(41.8% 0.166 265.3);

Tailwind

colors: {
  custom: {
    50: '#7275c1',
    500: '#1f41a5',
    950: '#000000',
  },
}

SCSS

$custom: #1f41a5;
$custom-light: #7275c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f41a5",
  "rgb": {
    "r": 31,
    "g": 65,
    "b": 165
  },
  "hsl": {
    "h": 224.776,
    "s": 68.367,
    "l": 38.431
  },
  "oklch": {
    "l": 0.41761,
    "c": 0.16607,
    "h": 265.3
  },
  "luminance": 0.06789
}

Semantic roles & 50–950 ramp

primary

#1F41A5

secondary

#C5AA5B

accent

#BF3DEB

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1F41A5

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

Preview Lab → · Contrast checker → · Palette generator →