#27D4ED
Closest named color: Aqua Blue (#02D8E9). oklch(80% 0.133 210.4), rgb(39, 212, 237).
Aa
Black text reads best on this color (11.72:1).
About this color
#27D4ED is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.133 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.015 away. Black text reads best on it, at 11.72:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 11.72:1 |
| White text | 1.79:1 |
Values
| HEX | #27D4ED |
| RGB | rgb(39, 212, 237) |
| HSL | hsl(188, 85%, 54%) |
| OKLCH | oklch(80% 0.133 210.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #27D4ED | 1.79:1 | Fails | Lc -36.6 | Non-text elements, placeholder text |
| Black text on #27D4ED | 11.72:1 | AAA | Lc 71.3 | Content text, not long reading |
| #27D4ED text on white | 1.79:1 | Fails | Lc 32.6 | Non-text elements, placeholder text |
| #27D4ED text on black | 11.72:1 | AAA | Lc -70.1 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#E9F9FC
oklch(97.1% 0.017 210.2)
-
Step 100
100
#CEF1F8
oklch(93.5% 0.038 211.1)
-
Step 200
200
#9FE7F4
oklch(88.5% 0.073 210)
-
Step 300
300 (this color)
#27D4ED
oklch(80% 0.133 210.4)
-
Step 400
400
#00B4CB
oklch(70.6% 0.122 210.8)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005A66
oklch(42.9% 0.074 210.4)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#27D4ED with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #BFCCEF | 0.124 |
| Deuteranopia (no green cones) | #A6BAED | 0.112 |
| Tritanopia (no blue cones) | #00DFDC | 0.045 |
| Achromatopsia (no color) | #C1C1C1 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #27D4ED
#27D4ED
oklch(80% 0.133 210.4)
- #FFA191
#FFA191
oklch(80% 0.115 30.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #27D4ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.015
- Vivid Sky Blue #4CC9F0 ΔE 0.034
- Bright Sky Blue #02CCFE ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.042
- Medium Turquoise #48D1CC ΔE 0.046
- Sky Blue #87CEEB ΔE 0.060
- Lightblue #7BC8F6 ΔE 0.061
- Turquoise #40E0D0 ΔE 0.062
Use #27D4ED in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.