#51A4E5#51A4E5

#51A4E5 is a light, vivid cyan. Relative luminance 0.340; OKLCH L 69.5% C 0.125 H 244.7°. Best body text is #000000 at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#51A4E5
RGB	rgb(81, 164, 229)
HSL	hsl(206, 74%, 61%)
HSV	hsv(206, 65%, 90%)
CMYK	cmyk(64.6%, 28.4%, 0%, 10.2%)
CIE-LAB	lab(64.93, -5.36, -40.22)
CIE-LCH	lch(64.93, 40.58, 262.40°)
OKLab	oklab(69.47% -0.0536 -0.1134)
OKLCH	oklch(69.47% 0.125 244.7)
XYZ	xyz(30.8063, 33.9543, 79.0439)
Luminance	0.3396 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A4E5 #E59251

analogous

#51E5DC #51A4E5 #515AE5

triadic

#51A4E5 #E551A4 #A4E551

tetradic

#51A4E5 #DC51E5 #E59251 #5AE551

square

#51A4E5 #DC51E5 #E59251 #5AE551

split-complementary

#51A4E5 #E5515A #E5DC51

monochromatic

#1866A3 #2088D8 #51A4E5 #86C0ED #BBDCF5

Accessibility & contrast

On white

2.70

#51A4E5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.79

#51A4E5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A4E5

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A4E5	#FFFFFF	#000000	##000000
##51A4E5	1.00	2.70	7.79	7.79
#FFFFFF	2.70	1.00	21.00	21.00
#000000	7.79	21.00	1.00	1.00
##000000	7.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#87A6E8

Deuteranopia (green-blind)

#7397E4

Tritanopia (blue-blind)

#00B4BB

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a4e5;
/* rgb */ color: rgb(81, 164, 229);
/* oklch */ color: oklch(69.5% 0.125 244.7);

Tailwind

colors: {
  custom: {
    50: '#90beed',
    500: '#51a4e5',
    950: '#000000',
  },
}

SCSS

$custom: #51a4e5;
$custom-light: #90beed;
$custom-dark: #000000;

JSON

{
  "hex": "#51a4e5",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 229
  },
  "hsl": {
    "h": 206.351,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.6947,
    "c": 0.12545,
    "h": 244.7
  },
  "luminance": 0.33957
}

Semantic roles & 50–950 ramp

primary

#51A4E5

secondary

#E5C5AD

accent

#670FD6

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A4E5

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

Preview Lab → · Contrast checker → · Palette generator →