#39B9EB
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.9% 0.129 229.1), rgb(57, 185, 235).
Aa
Black text reads best on this color (9.31:1).
About this color
#39B9EB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.129 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.030 away. Black text reads best on it, at 9.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.31:1 |
| White text | 2.25:1 |
Values
| HEX | #39B9EB |
| RGB | rgb(57, 185, 235) |
| HSL | hsl(197, 82%, 57%) |
| OKLCH | oklch(73.9% 0.129 229.1) |
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 #39B9EB | 2.25:1 | Fails | Lc -48.8 | Large or bold text, headings |
| Black text on #39B9EB | 9.31:1 | AAA | Lc 59.9 | Large or bold text, headings |
| #39B9EB text on white | 2.25:1 | Fails | Lc 44.0 | Non-text elements, placeholder text |
| #39B9EB text on black | 9.31:1 | AAA | Lc -58.1 | 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
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#DBEDF7
oklch(93.6% 0.023 231.8)
-
Step 200
200
#BCE0F1
oklch(88.6% 0.044 228.1)
-
Step 300
300
#88CBEA
oklch(80.8% 0.081 228.8)
-
Step 400
400 (this color)
#39B9EB
oklch(73.9% 0.129 229.1)
-
Step 500
500
#0096C5
oklch(63% 0.125 229.4)
-
Step 600
600
#007EA6
oklch(55.5% 0.11 229.3)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#004861
oklch(37.6% 0.075 229.8)
-
Step 950
950
#002B3B
oklch(27% 0.053 228.8)
#39B9EB 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) | #9FB6ED | 0.091 |
| Deuteranopia (no green cones) | #87A5EA | 0.078 |
| Tritanopia (no blue cones) | #00C7CA | 0.073 |
| Achromatopsia (no color) | #ADADAD | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39B9EB
#39B9EB
oklch(73.9% 0.129 229.1)
- #EB905D
#EB905D
oklch(73.8% 0.129 49.1)
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 #39B9EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.030
- Vivid Sky Blue #4CC9F0 ΔE 0.047
- Bright Sky Blue #02CCFE ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.062
- Lightblue #7BC8F6 ΔE 0.069
- Carolina Blue #8AB8FE ΔE 0.074
- Sky #82CAFC ΔE 0.080
- Dark Turquoise #00CED1 ΔE 0.080
Use #39B9EB 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.