#4EFDFD
A color in the Cyan, Emerald family
#4efdfd is a color in the Cyan, Emerald family: RGB(78, 253, 253), HSL(180°, 98%, 65%), CMYK(69%, 0%, 0%, 1%). Closest named color: aqua. Contrast is 1.25:1 on white and 16.79:1 on black. See shades, harmonies and color-blindness simulation.
Color Codes
| HEX | #4efdfd |
|---|---|
| RGB | rgb(78 253 253) |
| RGB (legacy) | rgb(78, 253, 253) |
| RGB % | rgb(31% 99% 99%) |
| HSL | hsl(180 98% 65%) |
| HSV / HSB | hsv(180, 69%, 99%) |
| HWB | hwb(180 31% 1%) |
| CMYK | cmyk(69%, 0%, 0%, 1%) |
| CIELAB (D50) | lab(90.81 -45.21 -13.62) |
| LCH | lch(90.81 47.22 196.76) |
| OKLab | oklab(0.9082 -0.1335 -0.0358) |
| OKLCH | oklch(0.9082 0.1382 194.99) |
| Decimal | 5176829 |
Properties
| Color Tone | Cyan, Emerald |
|---|---|
| Closest named color | aqua ΔE 1.7 |
| Closest web-safe color | #66ffff |
| Hue | 180° |
| Saturation (HSL / HSV) | 98% / 69% |
| Lightness (HSL) | 65% |
| Brightness or Value (HSV) | 99% |
| Luminance (Rec.601 / Rec.709) | 79% / 85% |
| Relative luminance (WCAG) | 0.7896 |
| Red / Green / Blue | 78 / 253 / 253 |
WCAG 2.2 Contrast Ratio
On White (#ffffff)
1.25:1
AA Normal (4.5:1) · FailAA Large (3:1) · FailAAA Normal (7:1) · Fail
On Black (#000000)
16.79:1
AA Normal (4.5:1) · PassAA Large (3:1) · PassAAA Normal (7:1) · Pass
Aa Bb 123
APCA Contrast Lc (reference) — As text on white / black: Lc 12 / -92 · As background with white / black text: Lc -13.9 / 91.6
Lightness Scale (OKLCH 50–950)
Eleven steps that change only perceived lightness while keeping hue and chroma — ready to use as design-system color tokens.
Tints (mixed with white)
Shades (mixed with black)
Color Harmonies
Complementary
Split Complementary
Analogous
Color Vision Deficiency Simulation
Estimated appearance of this color for people with color vision deficiencies (Machado 2009).
Similar Named Colors
Use in CSS
:root {
--color-brand: #4efdfd;
--color-brand-oklch: oklch(90.82% 0.1382 194.99);
}
.text { color: var(--color-brand); }
.background { background-color: var(--color-brand); }
.border { border: 1px solid rgb(78 253 253 / 50%); }
/* Tailwind CSS */
<div class="bg-[#4efdfd] text-[#4efdfd] border-[#4efdfd]">