#51BCE5#51BCE5

#51BCE5 is a light, moderate cyan. Relative luminance 0.434; OKLCH L 74.9% C 0.114 H 226.7°. Best body text is #000000 at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#51BCE5
RGB	rgb(81, 188, 229)
HSL	hsl(197, 74%, 61%)
HSV	hsv(197, 65%, 90%)
CMYK	cmyk(64.6%, 17.9%, 0%, 10.2%)
CIE-LAB	lab(71.80, -18.34, -29.54)
CIE-LCH	lch(71.80, 34.77, 238.17°)
OKLab	oklab(74.93% -0.0779 -0.0825)
OKLCH	oklch(74.93% 0.114 226.7)
XYZ	xyz(35.5138, 43.3691, 80.6130)
Luminance	0.4337 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCE5 #E57A51

analogous

#51E5C4 #51BCE5 #5172E5

triadic

#51BCE5 #E551BC #BCE551

tetradic

#51BCE5 #C451E5 #E57A51 #72E551

square

#51BCE5 #C451E5 #E57A51 #72E551

split-complementary

#51BCE5 #E55172 #E5C451

monochromatic

#187DA3 #20A5D8 #51BCE5 #86D1ED #BBE5F5

Accessibility & contrast

On white

2.17

#51BCE5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.67

#51BCE5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCE5

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCE5	#FFFFFF	#000000	##000000
##51BCE5	1.00	2.17	9.67	9.67
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.67	21.00	1.00	1.00
##000000	9.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A6B9E7

Deuteranopia (green-blind)

#91A9E5

Tritanopia (blue-blind)

#00C8C9

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bce5;
/* rgb */ color: rgb(81, 188, 229);
/* oklch */ color: oklch(74.9% 0.114 226.7);

Tailwind

colors: {
  custom: {
    50: '#91d0ed',
    500: '#51bce5',
    950: '#000000',
  },
}

SCSS

$custom: #51bce5;
$custom-light: #91d0ed;
$custom-dark: #000000;

JSON

{
  "hex": "#51bce5",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 229
  },
  "hsl": {
    "h": 196.622,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.74934,
    "c": 0.11351,
    "h": 226.7
  },
  "luminance": 0.43373
}

Semantic roles & 50–950 ramp

primary

#51BCE5

secondary

#E5BCAD

accent

#460FD6

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCE5

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

Preview Lab → · Contrast checker → · Palette generator →