#51A9EA#51A9EA

#51A9EA is a light, vivid cyan. Relative luminance 0.361; OKLCH L 70.8% C 0.127 H 243.4°. Best body text is #000000 at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#51A9EA
RGB	rgb(81, 169, 234)
HSL	hsl(205, 78%, 62%)
HSV	hsv(205, 65%, 92%)
CMYK	cmyk(65.4%, 27.8%, 0%, 8.2%)
CIE-LAB	lab(66.57, -6.52, -40.40)
CIE-LCH	lch(66.57, 40.92, 260.83°)
OKLab	oklab(70.84% -0.0571 -0.1139)
OKLCH	oklch(70.84% 0.127 243.4)
XYZ	xyz(32.4270, 36.0624, 83.0778)
Luminance	0.3607 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A9EA #EA9251

analogous

#51EADF #51A9EA #515DEA

triadic

#51A9EA #EA51A9 #A9EA51

tetradic

#51A9EA #DF51EA #EA9251 #5DEA51

square

#51A9EA #DF51EA #EA9251 #5DEA51

split-complementary

#51A9EA #EA515D #EADF51

monochromatic

#156CAC #1B8EE2 #51A9EA #88C4F1 #BEDFF7

Accessibility & contrast

On white

2.56

#51A9EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.21

#51A9EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A9EA

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A9EA	#FFFFFF	#000000	##000000
##51A9EA	1.00	2.56	8.21	8.21
#FFFFFF	2.56	1.00	21.00	21.00
#000000	8.21	21.00	1.00	1.00
##000000	8.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8CAAED

Deuteranopia (green-blind)

#779BE9

Tritanopia (blue-blind)

#00B9C0

Achromatopsia (no color)

#A2A2A2

Design tokens & code

CSS

--color: #51a9ea;
/* rgb */ color: rgb(81, 169, 234);
/* oklch */ color: oklch(70.8% 0.127 243.4);

Tailwind

colors: {
  custom: {
    50: '#91c2f1',
    500: '#51a9ea',
    950: '#000000',
  },
}

SCSS

$custom: #51a9ea;
$custom-light: #91c2f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51a9ea",
  "rgb": {
    "r": 81,
    "g": 169,
    "b": 234
  },
  "hsl": {
    "h": 205.49,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.70838,
    "c": 0.1274,
    "h": 243.4
  },
  "luminance": 0.36066
}

Semantic roles & 50–950 ramp

primary

#51A9EA

secondary

#E8C7AF

accent

#630BDB

background

#F9FBFE

surface

#F2F7FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A9EA

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

Preview Lab → · Contrast checker → · Palette generator →