#1D55B3#1D55B3

#1D55B3 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 47.0% C 0.161 H 260.3°. Best body text is #FFFFFF at 6.99:1 contrast (WCAG AA passes).

Color values

HEX	#1D55B3
RGB	rgb(29, 85, 179)
HSL	hsl(218, 72%, 41%)
HSV	hsv(218, 84%, 70%)
CMYK	cmyk(83.8%, 52.5%, 0%, 29.8%)
CIE-LAB	lab(37.86, 17.89, -54.93)
CIE-LCH	lch(37.86, 57.77, 288.04°)
OKLab	oklab(47.03% -0.027 -0.1584)
OKLCH	oklch(47.03% 0.161 260.3)
XYZ	xyz(11.8889, 10.0114, 43.9449)
Luminance	0.1001 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D55B3 #B37B1D

analogous

#1DA0B3 #1D55B3 #301DB3

triadic

#1D55B3 #B31D55 #55B31D

tetradic

#1D55B3 #B31DA0 #B37B1D #1DB330

square

#1D55B3 #B31DA0 #B37B1D #1DB330

split-complementary

#1D55B3 #B3301D #A0B31D

monochromatic

#0C234A #143C7E #1D55B3 #3071DD #6495E6

Accessibility & contrast

On white

6.99

#1D55B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.00

#1D55B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D55B3

6.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D55B3	#FFFFFF	#000000	##FFFFFF
##1D55B3	1.00	6.99	3.00	6.99
#FFFFFF	6.99	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	6.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1060B6

Deuteranopia (green-blind)

#0053B1

Tritanopia (blue-blind)

#006C7C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #1d55b3;
/* rgb */ color: rgb(29, 85, 179);
/* oklch */ color: oklch(47.0% 0.161 260.3);

Tailwind

colors: {
  custom: {
    50: '#7484ca',
    500: '#1d55b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d55b3;
$custom-light: #7484ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1d55b3",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 179
  },
  "hsl": {
    "h": 217.6,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.47028,
    "c": 0.16069,
    "h": 260.3
  },
  "luminance": 0.10013
}

Semantic roles & 50–950 ramp

primary

#1D55B3

secondary

#CBA361

accent

#AB39EF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1D55B3

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

Preview Lab → · Contrast checker → · Palette generator →