#51A7E4#51A7E4

#51A7E4 is a light, vivid cyan. Relative luminance 0.350; OKLCH L 70.1% C 0.122 H 242.2°. Best body text is #000000 at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#51A7E4
RGB	rgb(81, 167, 228)
HSL	hsl(205, 73%, 61%)
HSV	hsv(205, 64%, 89%)
CMYK	cmyk(64.5%, 26.8%, 0%, 10.6%)
CIE-LAB	lab(65.74, -7.36, -38.40)
CIE-LCH	lch(65.74, 39.10, 259.14°)
OKLab	oklab(70.1% -0.0569 -0.1081)
OKLCH	oklch(70.1% 0.122 242.2)
XYZ	xyz(31.2103, 34.9850, 78.4917)
Luminance	0.3499 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A7E4 #E48E51

analogous

#51E4D7 #51A7E4 #515DE4

triadic

#51A7E4 #E451A7 #A7E451

tetradic

#51A7E4 #D751E4 #E48E51 #5DE451

square

#51A7E4 #D751E4 #E48E51 #5DE451

split-complementary

#51A7E4 #E4515D #E4D751

monochromatic

#1969A2 #218BD7 #51A7E4 #86C2EC #BBDDF4

Accessibility & contrast

On white

2.63

#51A7E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.00

#51A7E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A7E4

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A7E4	#FFFFFF	#000000	##000000
##51A7E4	1.00	2.63	8.00	8.00
#FFFFFF	2.63	1.00	21.00	21.00
#000000	8.00	21.00	1.00	1.00
##000000	8.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8CA8E7

Deuteranopia (green-blind)

#7799E3

Tritanopia (blue-blind)

#00B6BC

Achromatopsia (no color)

#A0A0A0

Design tokens & code

CSS

--color: #51a7e4;
/* rgb */ color: rgb(81, 167, 228);
/* oklch */ color: oklch(70.1% 0.122 242.2);

Tailwind

colors: {
  custom: {
    50: '#90c1ec',
    500: '#51a7e4',
    950: '#000000',
  },
}

SCSS

$custom: #51a7e4;
$custom-light: #90c1ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51a7e4",
  "rgb": {
    "r": 81,
    "g": 167,
    "b": 228
  },
  "hsl": {
    "h": 204.898,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.70096,
    "c": 0.12221,
    "h": 242.2
  },
  "luminance": 0.34988
}

Semantic roles & 50–950 ramp

primary

#51A7E4

secondary

#E4C4AC

accent

#6210D5

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A7E4

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

Preview Lab → · Contrast checker → · Palette generator →