#51A4E8#51A4E8

#51A4E8 is a light, vivid cyan. Relative luminance 0.341; OKLCH L 69.6% C 0.129 H 245.9°. Best body text is #000000 at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#51A4E8
RGB	rgb(81, 164, 232)
HSL	hsl(207, 77%, 61%)
HSV	hsv(207, 65%, 91%)
CMYK	cmyk(65.1%, 29.3%, 0%, 9%)
CIE-LAB	lab(65.06, -4.38, -41.66)
CIE-LCH	lch(65.06, 41.89, 264.00°)
OKLab	oklab(69.62% -0.0527 -0.1176)
OKLCH	oklch(69.62% 0.129 245.9)
XYZ	xyz(31.2288, 34.1233, 81.2689)
Luminance	0.3413 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A4E8 #E89551

analogous

#51E8E1 #51A4E8 #5159E8

triadic

#51A4E8 #E851A4 #A4E851

tetradic

#51A4E8 #E151E8 #E89551 #59E851

square

#51A4E8 #E151E8 #E89551 #59E851

split-complementary

#51A4E8 #E85159 #E8E151

monochromatic

#1667A8 #1D87DE #51A4E8 #87C0EF #BDDDF6

Accessibility & contrast

On white

2.68

#51A4E8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.83

#51A4E8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A4E8

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A4E8	#FFFFFF	#000000	##000000
##51A4E8	1.00	2.68	7.83	7.83
#FFFFFF	2.68	1.00	21.00	21.00
#000000	7.83	21.00	1.00	1.00
##000000	7.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#86A6EB

Deuteranopia (green-blind)

#7197E7

Tritanopia (blue-blind)

#00B4BC

Achromatopsia (no color)

#9E9E9E

Design tokens & code

CSS

--color: #51a4e8;
/* rgb */ color: rgb(81, 164, 232);
/* oklch */ color: oklch(69.6% 0.129 245.9);

Tailwind

colors: {
  custom: {
    50: '#90beef',
    500: '#51a4e8',
    950: '#000000',
  },
}

SCSS

$custom: #51a4e8;
$custom-light: #90beef;
$custom-dark: #000000;

JSON

{
  "hex": "#51a4e8",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 232
  },
  "hsl": {
    "h": 207.02,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.69619,
    "c": 0.12887,
    "h": 245.9
  },
  "luminance": 0.34126
}

Semantic roles & 50–950 ramp

primary

#51A4E8

secondary

#E7C8AE

accent

#690DD9

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A4E8

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

Preview Lab → · Contrast checker → · Palette generator →