#557CCF#557CCF

#557CCF is a mid, vivid blue. Relative luminance 0.209; OKLCH L 59.7% C 0.135 H 263.8°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#557CCF
RGB	rgb(85, 124, 207)
HSL	hsl(221, 56%, 57%)
HSV	hsv(221, 59%, 81%)
CMYK	cmyk(58.9%, 40.1%, 0%, 18.8%)
CIE-LAB	lab(52.78, 11.50, -47.06)
CIE-LCH	lch(52.78, 48.45, 283.73°)
OKLab	oklab(59.68% -0.0145 -0.1337)
OKLCH	oklch(59.68% 0.135 263.8)
XYZ	xyz(22.2126, 20.8497, 61.8732)
Luminance	0.2085 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557CCF #CFA855

analogous

#55B9CF #557CCF #6B55CF

triadic

#557CCF #CF557C #7CCF55

tetradic

#557CCF #CF55B9 #CFA855 #55CF6B

square

#557CCF #CF55B9 #CFA855 #55CF6B

split-complementary

#557CCF #CF6B55 #B9CF55

monochromatic

#254484 #335CB4 #557CCF #85A1DC #B4C6EA

Accessibility & contrast

On white

4.06

#557CCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.17

#557CCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557CCF

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557CCF	#FFFFFF	#000000	##000000
##557CCF	1.00	4.06	5.17	5.17
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.17	21.00	1.00	1.00
##000000	5.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5884D2

Deuteranopia (green-blind)

#4879CD

Tritanopia (blue-blind)

#008F9B

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #557ccf;
/* rgb */ color: rgb(85, 124, 207);
/* oklch */ color: oklch(59.7% 0.135 263.8);

Tailwind

colors: {
  custom: {
    50: '#8ea1de',
    500: '#557ccf',
    950: '#000000',
  },
}

SCSS

$custom: #557ccf;
$custom-light: #8ea1de;
$custom-dark: #000000;

JSON

{
  "hex": "#557ccf",
  "rgb": {
    "r": 85,
    "g": 124,
    "b": 207
  },
  "hsl": {
    "h": 220.82,
    "s": 55.963,
    "l": 57.255
  },
  "oklch": {
    "l": 0.59676,
    "c": 0.1345,
    "h": 263.8
  },
  "luminance": 0.20852
}

Semantic roles & 50–950 ramp

primary

#557CCF

secondary

#D9C9A7

accent

#AF49DF

background

#F9F9FD

surface

#F1F2FB

border

#CBCCD4

text

#0D0E15

muted

#7E7E83

Preview Lab

Preview with #557CCF

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

Preview Lab → · Contrast checker → · Palette generator →