#28A4DD
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.9% 0.132 234.5), rgb(40, 164, 221).
Aa
Black text reads best on this color (7.44:1).
About this color
#28A4DD is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.132 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.056 away. Black text reads best on it, at 7.44:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.44:1 |
| White text | 2.82:1 |
Values
| HEX | #28A4DD |
| RGB | rgb(40, 164, 221) |
| HSL | hsl(199, 73%, 51%) |
| OKLCH | oklch(67.9% 0.132 234.5) |
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 #28A4DD | 2.82:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #28A4DD | 7.44:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #28A4DD text on white | 2.82:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #28A4DD text on black | 7.44:1 | AAA | Lc -48.1 | 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
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DBEDF8
oklch(93.6% 0.024 234.4)
-
Step 200
200
#BDDFF3
oklch(88.5% 0.045 233.8)
-
Step 300
300
#8BCAEE
oklch(80.9% 0.082 234.2)
-
Step 400
400 (this color)
#28A4DD
oklch(67.9% 0.132 234.5)
-
Step 500
500
#0095CD
oklch(63.1% 0.132 234.2)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#004765
oklch(37.6% 0.08 234.9)
-
Step 950
950
#002A3E
oklch(26.9% 0.057 235.2)
#28A4DD 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) | #88A3E0 | 0.081 |
| Deuteranopia (no green cones) | #7093DC | 0.066 |
| Tritanopia (no blue cones) | #00B3B8 | 0.081 |
| Achromatopsia (no color) | #9A9A9A | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28A4DD
#28A4DD
oklch(67.9% 0.132 234.5)
- #D67F40
#D67F40
oklch(67.9% 0.133 54.1)
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 #28A4DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.064
- Faded Blue #658CBB ΔE 0.078
- Greyblue #77A1B5 ΔE 0.079
- Deep Sky Blue #00BFFF ΔE 0.079
- Dodger Blue #1E90FF ΔE 0.082
Use #28A4DD 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.