#3DB9F0
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.2% 0.132 232), rgb(61, 185, 240).
Aa
Black text reads best on this color (9.39:1).
About this color
#3DB9F0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 74%, its chroma 0.132 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.025 away. Black text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.39:1 |
| White text | 2.23:1 |
Values
| HEX | #3DB9F0 |
| RGB | rgb(61, 185, 240) |
| HSL | hsl(198, 86%, 59%) |
| OKLCH | oklch(74.2% 0.132 232) |
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 #3DB9F0 | 2.23:1 | Fails | Lc -48.4 | Large or bold text, headings |
| Black text on #3DB9F0 | 9.39:1 | AAA | Lc 60.3 | Content text, not long reading |
| #3DB9F0 text on white | 2.23:1 | Fails | Lc 43.6 | Non-text elements, placeholder text |
| #3DB9F0 text on black | 9.39:1 | AAA | Lc -58.5 | 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
#DBEDF7
oklch(93.6% 0.023 231.8)
-
Step 200
200
#BCDFF3
oklch(88.5% 0.046 233.1)
-
Step 300
300
#89CBED
oklch(81% 0.082 231.5)
-
Step 400
400 (this color)
#3DB9F0
oklch(74.2% 0.132 232)
-
Step 500
500
#0096C9
oklch(63.2% 0.128 231.5)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
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
#002B3D
oklch(27.1% 0.055 231.9)
#3DB9F0 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) | #9DB7F3 | 0.086 |
| Deuteranopia (no green cones) | #85A6EF | 0.073 |
| Tritanopia (no blue cones) | #00C8CB | 0.080 |
| Achromatopsia (no color) | #ADADAD | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3DB9F0
#3DB9F0
oklch(74.2% 0.132 232)
- #EC9258
#EC9258
oklch(74.2% 0.132 52.2)
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 #3DB9F0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.025
- Vivid Sky Blue #4CC9F0 ΔE 0.047
- Bright Sky Blue #02CCFE ΔE 0.050
- Lightblue #7BC8F6 ΔE 0.067
- Carolina Blue #8AB8FE ΔE 0.069
- Turquoise Blue #06B1C4 ΔE 0.070
- Sky #82CAFC ΔE 0.077
- Dark Turquoise #00CED1 ΔE 0.086
Use #3DB9F0 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.