#52B1EF
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.9% 0.127 240.3), rgb(82, 177, 239).
Aa
Black text reads best on this color (8.89:1).
About this color
#52B1EF is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.127 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.043 away. Black text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.89:1 |
| White text | 2.36:1 |
Values
| HEX | #52B1EF |
| RGB | rgb(82, 177, 239) |
| HSL | hsl(204, 83%, 63%) |
| OKLCH | oklch(72.9% 0.127 240.3) |
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 #52B1EF | 2.36:1 | Fails | Lc -51.2 | Large or bold text, headings |
| Black text on #52B1EF | 8.89:1 | AAA | Lc 57.7 | Large or bold text, headings |
| #52B1EF text on white | 2.36:1 | Fails | Lc 46.3 | Large or bold text, headings |
| #52B1EF text on black | 8.89:1 | AAA | Lc -55.8 | 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
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DDECF8
oklch(93.5% 0.023 241.9)
-
Step 200
200
#C0DEF4
oklch(88.6% 0.044 239.8)
-
Step 300
300
#92C8EF
oklch(80.9% 0.079 240.3)
-
Step 400
400 (this color)
#52B1EF
oklch(72.9% 0.127 240.3)
-
Step 500
500
#0092D8
oklch(63% 0.146 240.6)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#002942
oklch(26.9% 0.063 241.6)
#52B1EF 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) | #95B1F2 | 0.067 |
| Deuteranopia (no green cones) | #7FA2EE | 0.054 |
| Tritanopia (no blue cones) | #00C0C6 | 0.089 |
| Achromatopsia (no color) | #A9A9A9 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #52B1EF
#52B1EF
oklch(72.9% 0.127 240.3)
- #E1934E
#E1934E
oklch(72.9% 0.127 60.2)
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 #52B1EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.043
- Carolina Blue #8AB8FE ΔE 0.063
- Vivid Sky Blue #4CC9F0 ΔE 0.066
- Bright Sky Blue #02CCFE ΔE 0.071
- Cornflower Blue #6495ED ΔE 0.075
- Turquoise Blue #06B1C4 ΔE 0.076
- Lightblue #7BC8F6 ΔE 0.076
- Chefchaouen Blue #4895EF ΔE 0.079
Use #52B1EF 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.