#557DDD#557DDD

#557DDD is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.7% C 0.153 H 265.1°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).

Color values

HEX	#557DDD
RGB	rgb(85, 125, 221)
HSL	hsl(222, 67%, 60%)
HSV	hsv(222, 62%, 87%)
CMYK	cmyk(61.5%, 43.4%, 0%, 13.3%)
CIE-LAB	lab(53.83, 15.58, -53.30)
CIE-LCH	lch(53.83, 55.53, 286.30°)
OKLab	oklab(60.73% -0.0129 -0.152)
OKLCH	oklch(60.73% 0.153 265.1)
XYZ	xyz(24.1266, 21.8169, 71.3322)
Luminance	0.2182 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557DDD #DDB555

analogous

#55C1DD #557DDD #7155DD

triadic

#557DDD #DD557D #7DDD55

tetradic

#557DDD #DD55C1 #DDB555 #55DD71

square

#557DDD #DD55C1 #DDB555 #55DD71

split-complementary

#557DDD #DD7155 #C1DD55

monochromatic

#1F4399 #2959CC #557DDD #88A4E7 #BBCBF1

Accessibility & contrast

On white

3.92

#557DDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.36

#557DDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557DDD

5.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557DDD	#FFFFFF	#000000	##000000
##557DDD	1.00	3.92	5.36	5.36
#FFFFFF	3.92	1.00	21.00	21.00
#000000	5.36	21.00	1.00	1.00
##000000	5.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5187E1

Deuteranopia (green-blind)

#3C7BDB

Tritanopia (blue-blind)

#0093A2

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #557ddd;
/* rgb */ color: rgb(85, 125, 221);
/* oklch */ color: oklch(60.7% 0.153 265.1);

Tailwind

colors: {
  custom: {
    50: '#91a2e8',
    500: '#557ddd',
    950: '#000000',
  },
}

SCSS

$custom: #557ddd;
$custom-light: #91a2e8;
$custom-dark: #000000;

JSON

{
  "hex": "#557ddd",
  "rgb": {
    "r": 85,
    "g": 125,
    "b": 221
  },
  "hsl": {
    "h": 222.353,
    "s": 66.667,
    "l": 60
  },
  "oklch": {
    "l": 0.60734,
    "c": 0.15256,
    "h": 265.1
  },
  "luminance": 0.21819
}

Semantic roles & 50–950 ramp

primary

#557DDD

secondary

#E1D2AD

accent

#B73EEA

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0E0F16

muted

#7E7E84

Preview Lab

Preview with #557DDD

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

Preview Lab → · Contrast checker → · Palette generator →