#51BCD2#51BCD2

#51BCD2 is a light, moderate cyan. Relative luminance 0.424; OKLCH L 74.2% C 0.102 H 213.4°. Best body text is #000000 at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#51BCD2
RGB	rgb(81, 188, 210)
HSL	hsl(190, 59%, 57%)
HSV	hsv(190, 61%, 82%)
CMYK	cmyk(61.4%, 10.5%, 0%, 17.6%)
CIE-LAB	lab(71.12, -24.09, -20.24)
CIE-LCH	lch(71.12, 31.46, 220.04°)
OKLab	oklab(74.16% -0.0851 -0.0562)
OKLCH	oklch(74.16% 0.102 213.4)
XYZ	xyz(33.0047, 42.3655, 67.3983)
Luminance	0.4237 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCD2 #D26751

analogous

#51D2A8 #51BCD2 #517BD2

triadic

#51BCD2 #D251BC #BCD251

tetradic

#51BCD2 #A851D2 #D26751 #7BD251

square

#51BCD2 #A851D2 #D26751 #7BD251

split-complementary

#51BCD2 #D2517B #D2A851

monochromatic

#237586 #2F9FB7 #51BCD2 #82CFDF #B2E1EB

Accessibility & contrast

On white

2.22

#51BCD2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.47

#51BCD2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCD2

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCD2	#FFFFFF	#000000	##000000
##51BCD2	1.00	2.22	9.47	9.47
#FFFFFF	2.22	1.00	21.00	21.00
#000000	9.47	21.00	1.00	1.00
##000000	9.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABB6D3

Deuteranopia (green-blind)

#98A8D2

Tritanopia (blue-blind)

#00C5C3

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51bcd2;
/* rgb */ color: rgb(81, 188, 210);
/* oklch */ color: oklch(74.2% 0.102 213.4);

Tailwind

colors: {
  custom: {
    50: '#8fd0df',
    500: '#51bcd2',
    950: '#000000',
  },
}

SCSS

$custom: #51bcd2;
$custom-light: #8fd0df;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcd2",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 210
  },
  "hsl": {
    "h": 190.233,
    "s": 58.904,
    "l": 57.059
  },
  "oklch": {
    "l": 0.74161,
    "c": 0.10198,
    "h": 213.4
  },
  "luminance": 0.42369
}

Semantic roles & 50–950 ramp

primary

#51BCD2

secondary

#DAAEA5

accent

#6046E2

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #51BCD2

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

Preview Lab → · Contrast checker → · Palette generator →