#28AEF8
Closest named color: Deep Sky Blue (#00BFFF). oklch(71.6% 0.152 239.7), rgb(40, 174, 248).
Aa
Black text reads best on this color (8.50:1).
About this color
#28AEF8 is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.152 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.045 away. Black text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.50:1 |
| White text | 2.47:1 |
Values
| HEX | #28AEF8 |
| RGB | rgb(40, 174, 248) |
| HSL | hsl(201, 94%, 56%) |
| OKLCH | oklch(71.6% 0.152 239.7) |
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 #28AEF8 | 2.47:1 | Fails | Lc -53.1 | Large or bold text, headings |
| Black text on #28AEF8 | 8.50:1 | AAA | Lc 56.0 | Large or bold text, headings |
| #28AEF8 text on white | 2.47:1 | Fails | Lc 48.0 | Large or bold text, headings |
| #28AEF8 text on black | 8.50:1 | AAA | Lc -54.0 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF7FD
oklch(97.1% 0.013 236.6)
-
Step 100
100
#DAEDFB
oklch(93.6% 0.028 239.7)
-
Step 200
200
#BADFF9
oklch(88.6% 0.053 238.8)
-
Step 300
300
#86C9F8
oklch(80.8% 0.095 240.1)
-
Step 400
400 (this color)
#28AEF8
oklch(71.6% 0.152 239.7)
-
Step 500
500
#0093D7
oklch(63.2% 0.144 239.7)
-
Step 600
600
#007BB5
oklch(55.6% 0.127 239.8)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#28AEF8 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) | #8BAFFB | 0.079 |
| Deuteranopia (no green cones) | #6F9DF7 | 0.061 |
| Tritanopia (no blue cones) | #00C1C8 | 0.101 |
| Achromatopsia (no color) | #A5A5A5 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28AEF8
#28AEF8
oklch(71.6% 0.152 239.7)
- #E7892C
#E7892C
oklch(71.6% 0.152 59.8)
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 #28AEF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.070
- Bright Sky Blue #02CCFE ΔE 0.081
- Turquoise Blue #06B1C4 ΔE 0.083
- Vivid Sky Blue #4CC9F0 ΔE 0.084
- Dodger Blue #1E90FF ΔE 0.084
- Dark Sky Blue #448EE4 ΔE 0.085
Use #28AEF8 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.