#39BBF9
Closest named color: Deep Sky Blue (#00BFFF). oklch(75% 0.141 234.4), rgb(57, 187, 249).
Aa
Black text reads best on this color (9.65:1).
About this color
#39BBF9 is a medium-light, vivid blue. In OKLCH its lightness is 75%, its chroma 0.141 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.016 away. Black text reads best on it, at 9.65:1.
| Hue family | Blues |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.65:1 |
| White text | 2.17:1 |
Values
| HEX | #39BBF9 |
| RGB | rgb(57, 187, 249) |
| HSL | hsl(199, 94%, 60%) |
| OKLCH | oklch(75% 0.141 234.4) |
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 #39BBF9 | 2.17:1 | Fails | Lc -47.1 | Large or bold text, headings |
| Black text on #39BBF9 | 9.65:1 | AAA | Lc 61.6 | Content text, not long reading |
| #39BBF9 text on white | 2.17:1 | Fails | Lc 42.4 | Non-text elements, placeholder text |
| #39BBF9 text on black | 9.65:1 | AAA | Lc -59.8 | 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
#EEF7FC
oklch(97.1% 0.012 231.7)
-
Step 100
100
#DAEDF9
oklch(93.6% 0.026 235.4)
-
Step 200
200
#BBDFF5
oklch(88.5% 0.049 234.9)
-
Step 300
300
#86CAF1
oklch(80.8% 0.088 234.5)
-
Step 400
400 (this color)
#39BBF9
oklch(75% 0.141 234.4)
-
Step 500
500
#0095CD
oklch(63.1% 0.132 234.2)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005679
oklch(42.8% 0.09 234.7)
-
Step 900
900
#004765
oklch(37.6% 0.08 234.9)
-
Step 950
950
#002A3E
oklch(26.9% 0.057 235.2)
#39BBF9 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) | #9DBAFC | 0.087 |
| Deuteranopia (no green cones) | #83A8F8 | 0.072 |
| Tritanopia (no blue cones) | #00CBD0 | 0.087 |
| Achromatopsia (no color) | #B0B0B0 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39BBF9
#39BBF9
oklch(75% 0.141 234.4)
- #F1934F
#F1934F
oklch(74.9% 0.141 54.5)
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 #39BBF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.016
- Bright Sky Blue #02CCFE ΔE 0.045
- Vivid Sky Blue #4CC9F0 ΔE 0.047
- Lightblue #7BC8F6 ΔE 0.065
- Carolina Blue #8AB8FE ΔE 0.066
- Sky #82CAFC ΔE 0.073
- Turquoise Blue #06B1C4 ΔE 0.082
- Light Sky Blue #87CEFA ΔE 0.085
Use #39BBF9 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.