#28A4DB
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.8% 0.13 233.5), rgb(40, 164, 219).
Aa
Black text reads best on this color (7.42:1).
About this color
#28A4DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.130 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.058 away. Black text reads best on it, at 7.42:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.42:1 |
| White text | 2.82:1 |
Values
| HEX | #28A4DB |
| RGB | rgb(40, 164, 219) |
| HSL | hsl(198, 71%, 51%) |
| OKLCH | oklch(67.8% 0.13 233.5) |
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 #28A4DB | 2.82:1 | Fails | Lc -59.1 | Large or bold text, headings |
| Black text on #28A4DB | 7.42:1 | AAA | Lc 50.2 | Large or bold text, headings |
| #28A4DB text on white | 2.82:1 | Fails | Lc 53.9 | Large or bold text, headings |
| #28A4DB text on black | 7.42:1 | AAA | Lc -48.0 | 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
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DBEDF7
oklch(93.6% 0.023 231.8)
-
Step 200
200
#BDDFF3
oklch(88.5% 0.045 233.8)
-
Step 300
300
#8BCAED
oklch(80.9% 0.081 233.5)
-
Step 400
400 (this color)
#28A4DB
oklch(67.8% 0.13 233.5)
-
Step 500
500
#0095CC
oklch(63.1% 0.132 233.7)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#28A4DB 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) | #89A3DE | 0.082 |
| Deuteranopia (no green cones) | #7192DA | 0.069 |
| Tritanopia (no blue cones) | #00B3B7 | 0.079 |
| Achromatopsia (no color) | #9A9A9A | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28A4DB
#28A4DB
oklch(67.8% 0.13 233.5)
- #D57F43
#D57F43
oklch(67.8% 0.13 53.4)
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 #28A4DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.066
- Faded Blue #658CBB ΔE 0.076
- Greyblue #77A1B5 ΔE 0.077
- Deep Sky Blue #00BFFF ΔE 0.080
- Water Blue #0E87CC ΔE 0.083
Use #28A4DB 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.