#1D55BB#1D55BB

#1D55BB is a mid, vivid blue. Relative luminance 0.103; OKLCH L 47.7% C 0.171 H 261.2°. Best body text is #FFFFFF at 6.84:1 contrast (WCAG AA passes).

Color values

HEX	#1D55BB
RGB	rgb(29, 85, 187)
HSL	hsl(219, 73%, 42%)
HSV	hsv(219, 84%, 73%)
CMYK	cmyk(84.5%, 54.5%, 0%, 26.7%)
CIE-LAB	lab(38.45, 21.05, -58.68)
CIE-LCH	lch(38.45, 62.34, 289.73°)
OKLab	oklab(47.66% -0.0261 -0.1694)
OKLCH	oklch(47.66% 0.171 261.2)
XYZ	xyz(12.7216, 10.3445, 48.3303)
Luminance	0.1035 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D55BB #BB831D

analogous

#1DA4BB #1D55BB #341DBB

triadic

#1D55BB #BB1D55 #55BB1D

tetradic

#1D55BB #BB1DA4 #BB831D #1DBB34

square

#1D55BB #BB1DA4 #BB831D #1DBB34

split-complementary

#1D55BB #BB341D #A4BB1D

monochromatic

#0D2551 #153D86 #1D55BB #3572E0 #6A97E8

Accessibility & contrast

On white

6.84

#1D55BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#1D55BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1D55BB

6.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D55BB	#FFFFFF	#000000	##FFFFFF
##1D55BB	1.00	6.84	3.07	6.84
#FFFFFF	6.84	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062BF

Deuteranopia (green-blind)

#0054B9

Tritanopia (blue-blind)

#006E7F

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #1d55bb;
/* rgb */ color: rgb(29, 85, 187);
/* oklch */ color: oklch(47.7% 0.171 261.2);

Tailwind

colors: {
  custom: {
    50: '#7684d0',
    500: '#1d55bb',
    950: '#000000',
  },
}

SCSS

$custom: #1d55bb;
$custom-light: #7684d0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d55bb",
  "rgb": {
    "r": 29,
    "g": 85,
    "b": 187
  },
  "hsl": {
    "h": 218.734,
    "s": 73.148,
    "l": 42.353
  },
  "oklch": {
    "l": 0.47664,
    "c": 0.17142,
    "h": 261.2
  },
  "luminance": 0.10346
}

Semantic roles & 50–950 ramp

primary

#1D55BB

secondary

#CEA966

accent

#AF38F0

background

#F7F8FC

surface

#EEEFF9

border

#C9CAD2

text

#0A0A14

muted

#7C7C82

Preview Lab

Preview with #1D55BB

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

Preview Lab → · Contrast checker → · Palette generator →