#39B3EF
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.7% 0.136 235), rgb(57, 179, 239).
Aa
Black text reads best on this color (8.86:1).
About this color
#39B3EF is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.136 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.035 away. Black text reads best on it, at 8.86:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.86:1 |
| White text | 2.36:1 |
Values
| HEX | #39B3EF |
| RGB | rgb(57, 179, 239) |
| HSL | hsl(200, 85%, 58%) |
| OKLCH | oklch(72.7% 0.136 235) |
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 #39B3EF | 2.36:1 | Fails | Lc -51.2 | Large or bold text, headings |
| Black text on #39B3EF | 8.86:1 | AAA | Lc 57.7 | Large or bold text, headings |
| #39B3EF text on white | 2.36:1 | Fails | Lc 46.3 | Large or bold text, headings |
| #39B3EF text on black | 8.86:1 | 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
#DBEDF8
oklch(93.6% 0.024 234.4)
-
Step 200
200
#BCDFF4
oklch(88.5% 0.047 234.4)
-
Step 300
300
#89CAF0
oklch(80.9% 0.085 234.9)
-
Step 400
400 (this color)
#39B3EF
oklch(72.7% 0.136 235)
-
Step 500
500
#0095CE
oklch(63.2% 0.133 234.7)
-
Step 600
600
#007DAE
oklch(55.7% 0.118 234.9)
-
Step 700
700
#006993
oklch(49.2% 0.104 234.9)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#004766
oklch(37.6% 0.081 235.8)
-
Step 950
950
#002A3E
oklch(26.9% 0.057 235.2)
#39B3EF 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) | #96B2F2 | 0.083 |
| Deuteranopia (no green cones) | #7DA1EE | 0.068 |
| Tritanopia (no blue cones) | #00C3C7 | 0.086 |
| Achromatopsia (no color) | #A8A8A8 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39B3EF
#39B3EF
oklch(72.7% 0.136 235)
- #E78E4C
#E78E4C
oklch(72.7% 0.135 55.2)
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 #39B3EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.035
- Vivid Sky Blue #4CC9F0 ΔE 0.064
- Bright Sky Blue #02CCFE ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.068
- Carolina Blue #8AB8FE ΔE 0.075
- Chefchaouen Blue #4895EF ΔE 0.081
- Lightblue #7BC8F6 ΔE 0.082
- Cornflower Blue #6495ED ΔE 0.082
Use #39B3EF 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.