#28BEF9
Closest named color: Deep Sky Blue (#00BFFF). oklch(75.3% 0.144 231.1), rgb(40, 190, 249).
Aa
Black text reads best on this color (9.82:1).
About this color
#28BEF9 is a medium-light, vivid blue. In OKLCH its lightness is 75%, its chroma 0.144 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.010 away. Black text reads best on it, at 9.82:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.82:1 |
| White text | 2.13:1 |
Values
| HEX | #28BEF9 |
| RGB | rgb(40, 190, 249) |
| HSL | hsl(197, 95%, 57%) |
| OKLCH | oklch(75.3% 0.144 231.1) |
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 #28BEF9 | 2.13:1 | Fails | Lc -46.1 | Large or bold text, headings |
| Black text on #28BEF9 | 9.82:1 | AAA | Lc 62.5 | Content text, not long reading |
| #28BEF9 text on white | 2.13:1 | Fails | Lc 41.4 | Non-text elements, placeholder text |
| #28BEF9 text on black | 9.82:1 | AAA | Lc -60.8 | Content text, not long reading |
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
#EEF7FC
oklch(97.1% 0.012 231.7)
-
Step 100
100
#D9EDF8
oklch(93.5% 0.026 231.6)
-
Step 200
200
#B9E0F5
oklch(88.6% 0.05 231.6)
-
Step 300
300
#82CCF0
oklch(81% 0.09 230.4)
-
Step 400
400 (this color)
#28BEF9
oklch(75.3% 0.144 231.1)
-
Step 500
500
#0096C8
oklch(63.1% 0.127 231)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8E
oklch(49.1% 0.099 230.6)
-
Step 800
800
#005775
oklch(42.8% 0.086 230.3)
-
Step 900
900
#004862
oklch(37.7% 0.076 230.8)
-
Step 950
950
#002B3C
oklch(27.1% 0.054 230.4)
#28BEF9 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) | #A0BCFC | 0.096 |
| Deuteranopia (no green cones) | #85A9F8 | 0.081 |
| Tritanopia (no blue cones) | #00CED2 | 0.083 |
| Achromatopsia (no color) | #B1B1B1 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28BEF9
#28BEF9
oklch(75.3% 0.144 231.1)
- #F69253
#F69253
oklch(75.4% 0.144 51.2)
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 #28BEF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.010
- Bright Sky Blue #02CCFE ΔE 0.037
- Vivid Sky Blue #4CC9F0 ΔE 0.042
- Lightblue #7BC8F6 ΔE 0.064
- Carolina Blue #8AB8FE ΔE 0.072
- Sky #82CAFC ΔE 0.073
- Turquoise Blue #06B1C4 ΔE 0.081
- Aqua Blue #02D8E9 ΔE 0.082
Use #28BEF9 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.