#28D8FB
Closest named color: Aqua Blue (#02D8E9). oklch(81.5% 0.138 215.8), rgb(40, 216, 251).
Aa
Black text reads best on this color (12.30:1).
About this color
#28D8FB is a light, moderately saturated teal or cyan. In OKLCH its lightness is 81%, its chroma 0.138 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.028 away. Black text reads best on it, at 12.30:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.30:1 |
| White text | 1.70:1 |
Values
| HEX | #28D8FB |
| RGB | rgb(40, 216, 251) |
| HSL | hsl(190, 96%, 57%) |
| OKLCH | oklch(81.5% 0.138 215.8) |
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 #28D8FB | 1.70:1 | Fails | Lc -33.8 | Non-text elements, placeholder text |
| Black text on #28D8FB | 12.30:1 | AAA | Lc 73.8 | Content text, not long reading |
| #28D8FB text on white | 1.70:1 | Fails | Lc 30.0 | Non-text elements, placeholder text |
| #28D8FB text on black | 12.30:1 | AAA | Lc -72.8 | 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
#E8F9FD
oklch(97.1% 0.019 213.4)
-
Step 100
100
#CDF1FB
oklch(93.6% 0.04 216.4)
-
Step 200
200
#9DE7FA
oklch(88.6% 0.078 215.6)
-
Step 300
300 (this color)
#28D8FB
oklch(81.5% 0.138 215.8)
-
Step 400
400
#00B3D2
oklch(70.6% 0.125 216)
-
Step 500
500
#009AB4
oklch(63.2% 0.112 215.3)
-
Step 600
600
#008198
oklch(55.6% 0.099 216.1)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#28D8FB 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) | #C0D1FD | 0.122 |
| Deuteranopia (no green cones) | #A6BEFB | 0.109 |
| Tritanopia (no blue cones) | #00E5E3 | 0.058 |
| Achromatopsia (no color) | #C6C6C6 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28D8FB
#28D8FB
oklch(81.5% 0.138 215.8)
- #FFAA92
#FFAA92
oklch(81.5% 0.106 36.5)
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 #28D8FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.028
- Bright Sky Blue #02CCFE ΔE 0.037
- Vivid Sky Blue #4CC9F0 ΔE 0.040
- Lightblue #7BC8F6 ΔE 0.058
- Sky Blue #87CEEB ΔE 0.059
- Light Sky Blue #87CEFA ΔE 0.061
- Sky #82CAFC ΔE 0.062
- Dark Turquoise #00CED1 ΔE 0.063
Use #28D8FB 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.