#3FA9DC
Closest named color: Turquoise Blue (#06B1C4). oklch(69.6% 0.121 233.4), rgb(63, 169, 220).
Aa
Black text reads best on this color (7.92:1).
About this color
#3FA9DC is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.121 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.052 away. Black text reads best on it, at 7.92:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.92:1 |
| White text | 2.65:1 |
Values
| HEX | #3FA9DC |
| RGB | rgb(63, 169, 220) |
| HSL | hsl(199, 69%, 55%) |
| OKLCH | oklch(69.6% 0.121 233.4) |
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 #3FA9DC | 2.65:1 | Fails | Lc -56.4 | Large or bold text, headings |
| Black text on #3FA9DC | 7.92:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #3FA9DC text on white | 2.65:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #3FA9DC text on black | 7.92:1 | AAA | Lc -50.6 | 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
#EFF7FB
oklch(97.1% 0.01 228.9)
-
Step 100
100
#DCEDF6
oklch(93.6% 0.022 230.5)
-
Step 200
200
#BFDFF1
oklch(88.6% 0.042 232.6)
-
Step 300
300
#8FC9EA
oklch(80.8% 0.076 233.9)
-
Step 400
400 (this color)
#3FA9DC
oklch(69.6% 0.121 233.4)
-
Step 500
500
#0095CC
oklch(63.1% 0.132 233.7)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#3FA9DC 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) | #90A7DE | 0.077 |
| Deuteranopia (no green cones) | #7B98DB | 0.066 |
| Tritanopia (no blue cones) | #00B7BA | 0.076 |
| Achromatopsia (no color) | #9F9F9F | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA9DC
#3FA9DC
oklch(69.6% 0.121 233.4)
- #D78751
#D78751
oklch(69.6% 0.121 53.4)
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 #3FA9DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.068
- Greyblue #77A1B5 ΔE 0.068
- Deep Sky Blue #00BFFF ΔE 0.068
- Cornflower Blue #6495ED ΔE 0.070
- Dark Sky Blue #448EE4 ΔE 0.078
- Bluegrey #85A3B2 ΔE 0.081
- Faded Blue #658CBB ΔE 0.083
Use #3FA9DC 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.