#1D55B1#1D55B1

#1D55B1 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 46.9% C 0.158 H 260.1°. Best body text is #FFFFFF at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#1D55B1
RGB	rgb(29, 85, 177)
HSL	hsl(217, 72%, 40%)
HSV	hsv(217, 84%, 69%)
CMYK	cmyk(83.6%, 52%, 0%, 30.6%)
CIE-LAB	lab(37.72, 17.10, -53.99)
CIE-LCH	lch(37.72, 56.63, 287.57°)
OKLab	oklab(46.87% -0.0273 -0.1556)
OKLCH	oklch(46.87% 0.158 260.1)
XYZ	xyz(11.6881, 9.9311, 42.8873)
Luminance	0.0993 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D55B1 #B1791D

analogous

#1D9FB1 #1D55B1 #2F1DB1

triadic

#1D55B1 #B11D55 #55B11D

tetradic

#1D55B1 #B11D9F #B1791D #1DB12F

square

#1D55B1 #B11D9F #B1791D #1DB12F

split-complementary

#1D55B1 #B12F1D #9FB11D

monochromatic

#0C2248 #143C7C #1D55B1 #2E70DD #6394E5

Accessibility & contrast

On white

7.03

#1D55B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#1D55B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D55B1

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D55B1	#FFFFFF	#000000	##FFFFFF
##1D55B1	1.00	7.03	2.99	7.03
#FFFFFF	7.03	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1560B4

Deuteranopia (green-blind)

#0052AF

Tritanopia (blue-blind)

#006B7B

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1d55b1;
/* rgb */ color: rgb(29, 85, 177);
/* oklch */ color: oklch(46.9% 0.158 260.1);

Tailwind

colors: {
  custom: {
    50: '#7384c9',
    500: '#1d55b1',
    950: '#000000',
  },
}

SCSS

$custom: #1d55b1;
$custom-light: #7384c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d55b1",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 177
  },
  "hsl": {
    "h": 217.297,
    "s": 71.845,
    "l": 40.392
  },
  "oklch": {
    "l": 0.46872,
    "c": 0.15799,
    "h": 260.1
  },
  "luminance": 0.09933
}

Semantic roles & 50–950 ramp

primary

#1D55B1

secondary

#CAA260

accent

#AA39EF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1D55B1

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

Preview Lab → · Contrast checker → · Palette generator →