#28A8EF
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.8% 0.147 239.6), rgb(40, 168, 239).
Aa
Black text reads best on this color (7.93:1).
About this color
#28A8EF is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.147 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.052 away. Black text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #28A8EF |
| RGB | rgb(40, 168, 239) |
| HSL | hsl(201, 86%, 55%) |
| OKLCH | oklch(69.8% 0.147 239.6) |
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 #28A8EF | 2.64:1 | Fails | Lc -56.2 | Large or bold text, headings |
| Black text on #28A8EF | 7.93:1 | AAA | Lc 53.0 | Large or bold text, headings |
| #28A8EF text on white | 2.64:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #28A8EF text on black | 7.93:1 | AAA | Lc -50.9 | 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
#DBEDFA
oklch(93.7% 0.026 239.1)
-
Step 200
200
#BBDFF8
oklch(88.6% 0.051 238.5)
-
Step 300
300
#88C9F6
oklch(80.9% 0.092 239.6)
-
Step 400
400 (this color)
#28A8EF
oklch(69.8% 0.147 239.6)
-
Step 500
500
#0093D6
oklch(63.1% 0.143 239.3)
-
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)
#28A8EF 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) | #86A9F2 | 0.076 |
| Deuteranopia (no green cones) | #6B97EE | 0.060 |
| Tritanopia (no blue cones) | #00BAC1 | 0.097 |
| Achromatopsia (no color) | #9F9F9F | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28A8EF
#28A8EF
oklch(69.8% 0.147 239.6)
- #DF842C
#DF842C
oklch(69.7% 0.147 59.4)
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 #28A8EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.059
- Deep Sky Blue #00BFFF ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.068
- Dodger Blue #1E90FF ΔE 0.074
- Turquoise Blue #06B1C4 ΔE 0.077
- Soft Blue #6488EA ΔE 0.088
- Greyblue #77A1B5 ΔE 0.096
Use #28A8EF 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.