#51A3E5#51A3E5

#51A3E5 is a light, vivid cyan. Relative luminance 0.336; OKLCH L 69.2% C 0.126 H 245.4°. Best body text is #000000 at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#51A3E5
RGB	rgb(81, 163, 229)
HSL	hsl(207, 74%, 61%)
HSV	hsv(207, 65%, 90%)
CMYK	cmyk(64.6%, 28.8%, 0%, 10.2%)
CIE-LAB	lab(64.64, -4.80, -40.67)
CIE-LCH	lch(64.64, 40.95, 263.26°)
OKLab	oklab(69.25% -0.0526 -0.1147)
OKLCH	oklch(69.25% 0.126 245.4)
XYZ	xyz(30.6281, 33.5977, 78.9844)
Luminance	0.3360 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A3E5 #E59351

analogous

#51E5DD #51A3E5 #5159E5

triadic

#51A3E5 #E551A3 #A3E551

tetradic

#51A3E5 #DD51E5 #E59351 #59E551

square

#51A3E5 #DD51E5 #E59351 #59E551

split-complementary

#51A3E5 #E55159 #E5DD51

monochromatic

#1865A3 #2086D8 #51A3E5 #86BFED #BBDBF5

Accessibility & contrast

On white

2.72

#51A3E5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.72

#51A3E5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3E5

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A3E5	#FFFFFF	#000000	##000000
##51A3E5	1.00	2.72	7.72	7.72
#FFFFFF	2.72	1.00	21.00	21.00
#000000	7.72	21.00	1.00	1.00
##000000	7.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#86A5E8

Deuteranopia (green-blind)

#7296E4

Tritanopia (blue-blind)

#00B3BA

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51a3e5;
/* rgb */ color: rgb(81, 163, 229);
/* oklch */ color: oklch(69.2% 0.126 245.4);

Tailwind

colors: {
  custom: {
    50: '#90beed',
    500: '#51a3e5',
    950: '#000000',
  },
}

SCSS

$custom: #51a3e5;
$custom-light: #90beed;
$custom-dark: #000000;

JSON

{
  "hex": "#51a3e5",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 229
  },
  "hsl": {
    "h": 206.757,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.69245,
    "c": 0.1262,
    "h": 245.4
  },
  "luminance": 0.33601
}

Semantic roles & 50–950 ramp

primary

#51A3E5

secondary

#E5C6AD

accent

#680FD6

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A3E5

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

Preview Lab → · Contrast checker → · Palette generator →