#1550B4#1550B4

#1550B4 is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.8% C 0.170 H 260.6°. Best body text is #FFFFFF at 7.40:1 contrast (WCAG AA passes).

Color values

HEX	#1550B4
RGB	rgb(21, 80, 180)
HSL	hsl(218, 79%, 39%)
HSV	hsv(218, 88%, 71%)
CMYK	cmyk(88.3%, 55.6%, 0%, 29.4%)
CIE-LAB	lab(36.35, 21.03, -57.99)
CIE-LCH	lch(36.35, 61.69, 289.94°)
OKLab	oklab(45.85% -0.0277 -0.1676)
OKLCH	oklch(45.85% 0.17 260.6)
XYZ	xyz(11.4131, 9.1906, 44.3436)
Luminance	0.0919 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1550B4 #B47915

analogous

#15A0B4 #1550B4 #2A15B4

triadic

#1550B4 #B41550 #50B415

tetradic

#1550B4 #B415A0 #B47915 #15B42A

square

#1550B4 #B415A0 #B47915 #15B42A

split-complementary

#1550B4 #B42A15 #A0B415

monochromatic

#081F46 #0F387D #1550B4 #216AE5 #588FEC

Accessibility & contrast

On white

7.40

#1550B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#1550B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1550B4

7.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1550B4	#FFFFFF	#000000	##FFFFFF
##1550B4	1.00	7.40	2.84	7.40
#FFFFFF	7.40	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB7

Deuteranopia (green-blind)

#004FB2

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1550b4;
/* rgb */ color: rgb(21, 80, 180);
/* oklch */ color: oklch(45.8% 0.170 260.6);

Tailwind

colors: {
  custom: {
    50: '#7380cb',
    500: '#1550b4',
    950: '#000000',
  },
}

SCSS

$custom: #1550b4;
$custom-light: #7380cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1550b4",
  "rgb": {
    "r": 21,
    "g": 80,
    "b": 180
  },
  "hsl": {
    "h": 217.736,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.45847,
    "c": 0.16985,
    "h": 260.6
  },
  "luminance": 0.09192
}

Semantic roles & 50–950 ramp

primary

#1550B4

secondary

#CFA256

accent

#AD32F6

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1550B4

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

Preview Lab → · Contrast checker → · Palette generator →