#51BAE5#51BAE5

#51BAE5 is a light, moderate cyan. Relative luminance 0.425; OKLCH L 74.5% C 0.114 H 228.3°. Best body text is #000000 at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#51BAE5
RGB	rgb(81, 186, 229)
HSL	hsl(197, 74%, 61%)
HSV	hsv(197, 65%, 90%)
CMYK	cmyk(64.6%, 18.8%, 0%, 10.2%)
CIE-LAB	lab(71.23, -17.30, -30.43)
CIE-LCH	lch(71.23, 35.00, 240.39°)
OKLab	oklab(74.47% -0.0759 -0.0851)
OKLCH	oklch(74.47% 0.114 228.3)
XYZ	xyz(35.0895, 42.5206, 80.4716)
Luminance	0.4252 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BAE5 #E57C51

analogous

#51E5C6 #51BAE5 #5170E5

triadic

#51BAE5 #E551BA #BAE551

tetradic

#51BAE5 #C651E5 #E57C51 #70E551

square

#51BAE5 #C651E5 #E57C51 #70E551

split-complementary

#51BAE5 #E55170 #E5C651

monochromatic

#187BA3 #20A3D8 #51BAE5 #86CFED #BBE4F5

Accessibility & contrast

On white

2.21

#51BAE5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.50

#51BAE5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BAE5

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BAE5	#FFFFFF	#000000	##000000
##51BAE5	1.00	2.21	9.50	9.50
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.50	21.00	1.00	1.00
##000000	9.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A4B7E7

Deuteranopia (green-blind)

#8FA8E4

Tritanopia (blue-blind)

#00C6C8

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bae5;
/* rgb */ color: rgb(81, 186, 229);
/* oklch */ color: oklch(74.5% 0.114 228.3);

Tailwind

colors: {
  custom: {
    50: '#91ceed',
    500: '#51bae5',
    950: '#000000',
  },
}

SCSS

$custom: #51bae5;
$custom-light: #91ceed;
$custom-dark: #000000;

JSON

{
  "hex": "#51bae5",
  "rgb": {
    "r": 81,
    "g": 186,
    "b": 229
  },
  "hsl": {
    "h": 197.432,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.74473,
    "c": 0.11402,
    "h": 228.3
  },
  "luminance": 0.42524
}

Semantic roles & 50–950 ramp

primary

#51BAE5

secondary

#E5BDAD

accent

#490FD6

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BAE5

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

Preview Lab → · Contrast checker → · Palette generator →