#39C4FF
Closest named color: Deep Sky Blue (#00BFFF). oklch(77.3% 0.141 231.6), rgb(57, 196, 255).
Aa
Black text reads best on this color (10.51:1).
About this color
#39C4FF is a medium-light, vivid blue. In OKLCH its lightness is 77%, its chroma 0.141 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.021 away. Black text reads best on it, at 10.51:1.
| Hue family | Blues |
| Lightness | medium-light (77%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 10.51:1 |
| White text | 1.99:1 |
Values
| HEX | #39C4FF |
| RGB | rgb(57, 196, 255) |
| HSL | hsl(198, 100%, 61%) |
| OKLCH | oklch(77.3% 0.141 231.6) |
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 #39C4FF | 1.99:1 | Fails | Lc -42.6 | Non-text elements, placeholder text |
| Black text on #39C4FF | 10.51:1 | AAA | Lc 65.7 | Content text, not long reading |
| #39C4FF text on white | 1.99:1 | Fails | Lc 38.2 | Non-text elements, placeholder text |
| #39C4FF text on black | 10.51:1 | AAA | Lc -64.2 | Content text, not long reading |
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 300.
-
Step 50
50
#EBF8FF
oklch(97.1% 0.017 230.9)
-
Step 100
100
#D2EFFF
oklch(93.6% 0.037 231.9)
-
Step 200
200
#ABE2FF
oklch(88.5% 0.069 231.5)
-
Step 300
300 (this color)
#39C4FF
oklch(77.3% 0.141 231.6)
-
Step 400
400
#00AFEA
oklch(70.8% 0.144 231.6)
-
Step 500
500
#0096C9
oklch(63.2% 0.128 231.5)
-
Step 600
600
#007EA9
oklch(55.6% 0.112 231.2)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#002B3C
oklch(27.1% 0.054 230.4)
#39C4FF 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) | #A6C2FF | 0.093 |
| Deuteranopia (no green cones) | #8CAFFE | 0.080 |
| Tritanopia (no blue cones) | #00D4D8 | 0.083 |
| Achromatopsia (no color) | #B7B7B7 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39C4FF
#39C4FF
oklch(77.3% 0.141 231.6)
- #FB995B
#FB995B
oklch(77.3% 0.141 51.6)
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 #39C4FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.021
- Bright Sky Blue #02CCFE ΔE 0.024
- Vivid Sky Blue #4CC9F0 ΔE 0.031
- Lightblue #7BC8F6 ΔE 0.050
- Sky #82CAFC ΔE 0.058
- Carolina Blue #8AB8FE ΔE 0.066
- Light Sky Blue #87CEFA ΔE 0.068
- Aqua Blue #02D8E9 ΔE 0.072
Use #39C4FF 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.