#557ECB#557ECB

#557ECB is a mid, vivid blue. Relative luminance 0.212; OKLCH L 59.9% C 0.127 H 262.0°. Best body text is #000000 at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#557ECB
RGB	rgb(85, 126, 203)
HSL	hsl(219, 53%, 56%)
HSV	hsv(219, 58%, 80%)
CMYK	cmyk(58.1%, 37.9%, 0%, 20.4%)
CIE-LAB	lab(53.13, 8.95, -44.25)
CIE-LCH	lch(53.13, 45.15, 281.44°)
OKLab	oklab(59.87% -0.0175 -0.1255)
OKLCH	oklch(59.87% 0.127 262)
XYZ	xyz(21.9829, 21.1630, 59.4147)
Luminance	0.2117 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557ECB #CBA255

analogous

#55B9CB #557ECB #6755CB

triadic

#557ECB #CB557E #7ECB55

tetradic

#557ECB #CB55B9 #CBA255 #55CB67

square

#557ECB #CB55B9 #CBA255 #55CB67

split-complementary

#557ECB #CB6755 #B9CB55

monochromatic

#27457F #355FAE #557ECB #84A2D9 #B3C5E8

Accessibility & contrast

On white

4.01

#557ECB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.23

#557ECB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557ECB

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557ECB	#FFFFFF	#000000	##000000
##557ECB	1.00	4.01	5.23	5.23
#FFFFFF	4.01	1.00	21.00	21.00
#000000	5.23	21.00	1.00	1.00
##000000	5.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E85CE

Deuteranopia (green-blind)

#4E7AC9

Tritanopia (blue-blind)

#008F9B

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #557ecb;
/* rgb */ color: rgb(85, 126, 203);
/* oklch */ color: oklch(59.9% 0.127 262.0);

Tailwind

colors: {
  custom: {
    50: '#8ea3db',
    500: '#557ecb',
    950: '#000000',
  },
}

SCSS

$custom: #557ecb;
$custom-light: #8ea3db;
$custom-dark: #000000;

JSON

{
  "hex": "#557ecb",
  "rgb": {
    "r": 85,
    "g": 126,
    "b": 203
  },
  "hsl": {
    "h": 219.153,
    "s": 53.153,
    "l": 56.471
  },
  "oklch": {
    "l": 0.59872,
    "c": 0.12668,
    "h": 262
  },
  "luminance": 0.21165
}

Semantic roles & 50–950 ramp

primary

#557ECB

secondary

#D6C5A6

accent

#AA4BDD

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #557ECB

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

Preview Lab → · Contrast checker → · Palette generator →