#28E3FF
Closest named color: Aqua Blue (#02D8E9). oklch(84.2% 0.141 211.1), rgb(40, 227, 255).
Aa
Black text reads best on this color (13.52:1).
About this color
#28E3FF is a light, vivid teal or cyan. In OKLCH its lightness is 84%, its chroma 0.141 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.040 away. Black text reads best on it, at 13.52:1.
| Hue family | Teals and cyans |
| Lightness | light (84%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 13.52:1 |
| White text | 1.55:1 |
Values
| HEX | #28E3FF |
| RGB | rgb(40, 227, 255) |
| HSL | hsl(188, 100%, 58%) |
| OKLCH | oklch(84.2% 0.141 211.1) |
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 #28E3FF | 1.55:1 | Fails | Lc -28.1 | Dividers and decoration only |
| Black text on #28E3FF | 13.52:1 | AAA | Lc 78.9 | Fine for body text |
| #28E3FF text on white | 1.55:1 | Fails | Lc 24.8 | Dividers and decoration only |
| #28E3FF text on black | 13.52:1 | AAA | Lc -78.3 | Fine for body text |
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
#E8F9FD
oklch(97.1% 0.019 213.4)
-
Step 100
100
#CCF2F9
oklch(93.6% 0.04 210)
-
Step 200
200
#9BE8F7
oklch(88.6% 0.078 211.2)
-
Step 300
300 (this color)
#28E3FF
oklch(84.2% 0.141 211.1)
-
Step 400
400
#00B4CC
oklch(70.6% 0.123 211.4)
-
Step 500
500
#009BAF
oklch(63.2% 0.11 210.8)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#28E3FF 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) | #CCDBFF | 0.130 |
| Deuteranopia (no green cones) | #B1C7FF | 0.118 |
| Tritanopia (no blue cones) | #00EFEC | 0.049 |
| Achromatopsia (no color) | #CFCFCF | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28E3FF
#28E3FF
oklch(84.2% 0.141 211.1)
- #FFB6A9
#FFB6A9
oklch(84.1% 0.088 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 #28E3FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.040
- Robin's Egg #6DEDFD ΔE 0.047
- Bright Light Blue #26F7FD ΔE 0.057
- Turquoise #40E0D0 ΔE 0.065
- Bright Sky Blue #02CCFE ΔE 0.066
- Vivid Sky Blue #4CC9F0 ΔE 0.068
- Sky Blue #87CEEB ΔE 0.070
- Light Sky Blue #87CEFA ΔE 0.072
Use #28E3FF 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.