#28A4E8
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.5% 0.143 239.2), rgb(40, 164, 232).
Aa
Black text reads best on this color (7.56:1).
About this color
#28A4E8 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.143 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.045 away. Black text reads best on it, at 7.56:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.56:1 |
| White text | 2.77:1 |
Values
| HEX | #28A4E8 |
| RGB | rgb(40, 164, 232) |
| HSL | hsl(201, 81%, 53%) |
| OKLCH | oklch(68.5% 0.143 239.2) |
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 #28A4E8 | 2.77:1 | Fails | Lc -58.3 | Large or bold text, headings |
| Black text on #28A4E8 | 7.56:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #28A4E8 text on white | 2.77:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #28A4E8 text on black | 7.56:1 | AAA | Lc -48.8 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DBEDFA
oklch(93.7% 0.026 239.1)
-
Step 200
200
#BCDEF7
oklch(88.4% 0.05 240)
-
Step 300
300
#8AC9F4
oklch(80.9% 0.089 239.1)
-
Step 400
400 (this color)
#28A4E8
oklch(68.5% 0.143 239.2)
-
Step 500
500
#0093D6
oklch(63.1% 0.143 239.3)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#00476A
oklch(37.9% 0.085 239)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#28A4E8 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) | #83A5EB | 0.075 |
| Deuteranopia (no green cones) | #6A93E7 | 0.061 |
| Tritanopia (no blue cones) | #00B5BC | 0.093 |
| Achromatopsia (no color) | #9B9B9B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28A4E8
#28A4E8
oklch(68.5% 0.143 239.2)
- #D9812E
#D9812E
oklch(68.5% 0.143 59.2)
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 #28A4E8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.045
- Cornflower Blue #6495ED ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.070
- Deep Sky Blue #00BFFF ΔE 0.074
- Turquoise Blue #06B1C4 ΔE 0.074
- Soft Blue #6488EA ΔE 0.081
- Faded Blue #658CBB ΔE 0.085
Use #28A4E8 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.