#39B1F3
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.4% 0.141 237.9), rgb(57, 177, 243).
Aa
Black text reads best on this color (8.75:1).
About this color
#39B1F3 is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.141 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.038 away. Black text reads best on it, at 8.75:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.75:1 |
| White text | 2.39:1 |
Values
| HEX | #39B1F3 |
| RGB | rgb(57, 177, 243) |
| HSL | hsl(201, 89%, 59%) |
| OKLCH | oklch(72.4% 0.141 237.9) |
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 #39B1F3 | 2.39:1 | Fails | Lc -51.8 | Large or bold text, headings |
| Black text on #39B1F3 | 8.75:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #39B1F3 text on white | 2.39:1 | Fails | Lc 46.8 | Large or bold text, headings |
| #39B1F3 text on black | 8.75:1 | AAA | Lc -55.2 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DBEDF9
oklch(93.6% 0.025 236.8)
-
Step 200
200
#BCDFF6
oklch(88.6% 0.049 236.9)
-
Step 300
300
#89C9F3
oklch(80.8% 0.088 238.1)
-
Step 400
400 (this color)
#39B1F3
oklch(72.4% 0.141 237.9)
-
Step 500
500
#0093D3
oklch(63% 0.14 238.1)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#39B1F3 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) | #92B1F6 | 0.079 |
| Deuteranopia (no green cones) | #78A0F2 | 0.062 |
| Tritanopia (no blue cones) | #00C2C8 | 0.092 |
| Achromatopsia (no color) | #A7A7A7 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39B1F3
#39B1F3
oklch(72.4% 0.141 237.9)
- #E68D41
#E68D41
oklch(72.3% 0.14 58.1)
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 #39B1F3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.038
- Vivid Sky Blue #4CC9F0 ΔE 0.071
- Bright Sky Blue #02CCFE ΔE 0.071
- Chefchaouen Blue #4895EF ΔE 0.074
- Turquoise Blue #06B1C4 ΔE 0.075
- Carolina Blue #8AB8FE ΔE 0.075
- Cornflower Blue #6495ED ΔE 0.076
- Lightblue #7BC8F6 ΔE 0.086
Use #39B1F3 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.