#557EC9#557EC9

#557EC9 is a mid, vivid blue. Relative luminance 0.211; OKLCH L 59.8% C 0.124 H 261.6°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#557EC9
RGB	rgb(85, 126, 201)
HSL	hsl(219, 52%, 56%)
HSV	hsv(219, 58%, 79%)
CMYK	cmyk(57.7%, 37.3%, 0%, 21.2%)
CIE-LAB	lab(53.02, 8.29, -43.27)
CIE-LCH	lch(53.02, 44.06, 280.85°)
OKLab	oklab(59.76% -0.018 -0.1226)
OKLCH	oklch(59.76% 0.124 261.6)
XYZ	xyz(21.7461, 21.0683, 58.1676)
Luminance	0.2107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557EC9 #C9A055

analogous

#55B8C9 #557EC9 #6655C9

triadic

#557EC9 #C9557E #7EC955

tetradic

#557EC9 #C955B8 #C9A055 #55C966

square

#557EC9 #C955B8 #C9A055 #55C966

split-complementary

#557EC9 #C96655 #B8C955

monochromatic

#27457C #365FAB #557EC9 #83A1D8 #B2C4E7

Accessibility & contrast

On white

4.03

#557EC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#557EC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557EC9

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557EC9	#FFFFFF	#000000	##000000
##557EC9	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F84CC

Deuteranopia (green-blind)

#507AC7

Tritanopia (blue-blind)

#008F9A

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #557ec9;
/* rgb */ color: rgb(85, 126, 201);
/* oklch */ color: oklch(59.8% 0.124 261.6);

Tailwind

colors: {
  custom: {
    50: '#8ea3da',
    500: '#557ec9',
    950: '#000000',
  },
}

SCSS

$custom: #557ec9;
$custom-light: #8ea3da;
$custom-dark: #000000;

JSON

{
  "hex": "#557ec9",
  "rgb": {
    "r": 85,
    "g": 126,
    "b": 201
  },
  "hsl": {
    "h": 218.793,
    "s": 51.786,
    "l": 56.078
  },
  "oklch": {
    "l": 0.59758,
    "c": 0.12393,
    "h": 261.6
  },
  "luminance": 0.2107
}

Semantic roles & 50–950 ramp

primary

#557EC9

secondary

#D5C4A5

accent

#A94DDB

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #557EC9

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

Preview Lab → · Contrast checker → · Palette generator →